IMA no. 2018-121a

• Pošepnýite

• $({\mathrm{Cu}}_{\mathrm{3}}^{+}{\mathrm{\square }}_{\mathrm{3}}{)}_{\mathrm{\Sigma }\mathrm{6}}$$({\mathrm{Hg}}_{\mathrm{4}}^{\mathrm{2}+}{\mathrm{Cu}}_{\mathrm{2}}^{+}{)}_{\mathrm{\Sigma }\mathrm{6}}$Sb₄(Se_12.5□_0.5)_Σ13

• At the mine dump of shaft no. 16 – Háje, near Příbram, Central Bohemia, Czech Republic ($\mathrm{49}{}^{\circ }{\mathrm{40}}^{\prime }{\mathrm{33.894}}^{\prime \prime }$ N, $\mathrm{14}{}^{\circ }{\mathrm{3}}^{\prime }{\mathrm{29.922}}^{\prime \prime }$ E)

• Pavel Škácha*, Jiří Sejkora, Jakub Plášil, and Emil Makovicky

• *E-mail: skacha-p@muzeum-pribram.cz

• Tetrahedrite group

• Cubic: $I\stackrel{\mathrm{‾}}{\mathrm{4}}\mathrm{3}m$; structure determined

• a=10.964(1) Å

• 4.476(11), 3.165(100), 2.930(24), 2.002(16), 1.938(65), 1.778(13), 1.653(31), 1.119(12)

• Type material is deposited in the mineralogical collections of the National Museum, Department of Mineralogy and Petrology, Cirkusová 1740, Prague 9, Czech Republic, catalogue number P1P 15/2015, and the Mining Museum, Hynka Kličky Place 293, Příbram VI, Březové Hory, Czech Republic, catalogue number 1/2016

• How to cite: Škácha, P., Sejkora, J., Plášil, J., and Makovicky, E.: Pošepnýite, IMA 2018-121a, in: CNMNC Newsletter 54, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-275-2020, 2020.

IMA no. 2018-145

• Hydroxyplumbopyrochlore

• (Pb_1.5□_0.5)Nb₂O₆(OH)

• Jabal Sayid peralkaline granitic complex, Saudi Arabia ($\mathrm{23}{}^{\circ }{\mathrm{49}}^{\prime }{\mathrm{28.72}}^{\prime \prime }$ N, $\mathrm{40}{}^{\circ }{\mathrm{56}}^{\prime }{\mathrm{30.93}}^{\prime \prime }$ E)

• Ting Li*, Ziying Li, Guang Fan, Honghai Fan, Jun Zhong, Naser S. Jahdali, Mingkuan Qin, Abdullah M. Jehani, Fenggang Wang, and Mubarak M. Nahdi

• *E-mail: liting_c@126.com

• Pyrochlore supergroup

• Cubic: Fd$\stackrel{\mathrm{‾}}{\mathrm{3}}m$; structure determined

• a=10.558(2) Å

• 6.051(8), 3.043(100), 2.636(42), 1.862(36), 1.591(43), 1.521(8), 1.320(6), 1.183(12)

• Type material is deposited in the mineralogical collections of the Geological Museum of China, no. 16 Yangrou Hutong, Xisi, Beijing 100031, People's Republic of China, catalogue number M13239

• How to cite: Li, T., Li, Z., Fan, G., Fan, H., Zhong, J., Jahdali, N. S., Qin, M., Jehani, A. M., Wang, F., and Nahdi, M. M.: Hydroxyplumbopyrochlore, IMA 2018-145, in: CNMNC Newsletter 54, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-275-2020, 2020.

IMA no. 2019-092

• Stangersite

• SnGeS₃

• In the central part of a burning coal mine dump of the abandoned Kateřina mine, Radvanice village, ca. 12 km east of Trutnov, northern Bohemia, Czech Republic ($\mathrm{50}{}^{\circ }{\mathrm{33}}^{\prime }{\mathrm{39.0}}^{\prime \prime }$ N, $\mathrm{16}{}^{\circ }{\mathrm{03}}^{\prime }{\mathrm{56.2}}^{\prime \prime }$ E)

• Jiří Sejkora*, Emil Makovicky, Tonci Balić-Žunić, and Peter Berlepsch

• *E-mail: jiri_sejkora@nm.cz

• Known synthetic analogue

• Monoclinic: P2₁∕c; structure determined

• a=7.270(1), b=10.197(2), c=6.846(1) Å, β=105.34(3)^∘

• 7.006(100), 4.135(49), 3.077(47), 2.810(29), 2.776(38), 2.699(69), 2.121(31), 1.724(35)

• Type material is deposited in the mineralogical collections of the Department of Mineralogy and Petrology, National Museum in Prague, Cirkusová 1740, 19300 Prague 9, Czech Republic, catalogue number P1P 8/2000

• How to cite: Sejkora, J., Makovicky, E., Balić-Žunić, T., and Berlepsch, P.: Stangersite, IMA 2019-092, in: CNMNC Newsletter 54, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-275-2020, 2020.

IMA no. 2019-101

• Meifuite

• KFe₆(Si₇Al)O₁₉(OH)₄Cl₂

• Fe–Cu ore deposit of Yinachang, Yangtze Block, China

• Shiyun Jin, Xiaochun Li, and Huifang Xu*

• *E-mail: hfxu@geology.wisc.edu

• Chemically and structurally related to annite

• Triclinic: $P\stackrel{\mathrm{‾}}{\mathrm{1}}$; structure determined

• a=22.777(1), b=9.5553(5), c=14.3282(8) Å, α=99.258(4), β=136.750(3), γ=89.899(4)^∘

• 9.56(100), 4.78(25), 3.19(19), 2.79(20), 2.69(15), 2.55(37), 2.44(13), 2.23(15)

• Type material is deposited in the mineralogical collections of the Geology Museum, Department of Geoscience, University of Wisconsin, 1215 West Dayton Street, Madison, WI 53706, USA, catalogue numbers UWGM 6859 (holotype), UWGM 6860 and UWGM 6861 (cotypes)

• How to cite: Jin, S., Li, X., and Xu, H.: Meifuite, IMA 2019-101, in: CNMNC Newsletter 54, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-275-2020, 2020.

IMA no. 2019-102

• Dutkevichite-(Ce)

• NaZnBa₂Ce₂Ti₂Si₈O₂₆F•H₂O

• In the moraine of Darai-Pioz glacier, Alai mountain range, Tien Shan, Rashtskii district, Tajikistan ($\mathrm{39}{}^{\circ }{\mathrm{30}}^{\prime }$ N, $\mathrm{70}{}^{\circ }{\mathrm{40}}^{\prime }$ E)

• Atali A. Agakhanov*, Leonid A. Pautov, Natalia V. Zubkova, Andrey A. Zolotarev, Anatoly V. Kasatkin, Vladimir Y. Karpenko, Igor V. Pekov, Vitaliya A. Agakhanova, Vyacheslav A. Muftakhov, Radek Škoda, and Sergey N. Britvin

• *E-mail: atali99@mail.ru

• The Zn analogue of byelorussite-(Ce)

• Orthorhombic: Ama2; structure determined

• a=22.238(5), b=10.497(3), c=9.649(2) Å

• 4.420(73), 4.281(35), 3.287(53), 3.203(39), 2.992(100), 2.939(56), 2.779(47), 2.606(40)

• Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5281/1

• How to cite: Agakhanov, A. A., Pautov, L. A., Zubkova, N. V., Zolotarev, A. A., Kasatkin, A. V., Karpenko, V. Y., Pekov, I. V., Agakhanova, V. A., Muftakhov, V. A., Škoda, R., and Britvin, S. N.: Dutkevichite-(Ce), IMA 2019-102, in: CNMNC Newsletter 54, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-275-2020, 2020.

IMA no. 2019-105

• Niasite

• ${\mathrm{Ni}}_{\mathrm{4.5}}^{\mathrm{2}+}$(AsO₄)₃

• Johanngeorgenstadt, Erzgebirgskreis, Saxony, Germany

• Anthony R. Kampf*, Barbara P. Nash, Jakub Plášil, Jason B. Smith, and Mark N. Feinglos

• *E-mail: akampf@nhm.org

• Isostructural with jeffbenite

• Tetragonal: $I\stackrel{\mathrm{‾}}{\mathrm{4}}$2d; structure determined

• a=6.8046(8), c=18.619(1) Å

• 3.274(18), 3.008(25), 2.752(100), 2.330(10), 1.706(21), 1.678(28), 1.446(13), 1.412(10)

• Cotype material is deposited in the mineralogical collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue number 74203, and the American Museum of Natural History, Central Park West and 79th Street, New York City, NY 10024, USA, catalogue number 17956

• How to cite: Kampf, A. R., Nash, B. P., Plášil, J., Smith, J. B., and Feinglos, M. N.: Niasite, IMA 2019-105, in: CNMNC Newsletter 54, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-275-2020, 2020.

IMA no. 2019-106

• Dobrovolskyite

• Na₄Ca(SO₄)₃

• Second scoria cone of the Northern Breakthrough of the Great Tolbachik fissure eruption, Tolbachik volcano, Kamchatka, Far Eastern Region, Russia ($\mathrm{55}{}^{\circ }{\mathrm{41}}^{\prime }$ N, $\mathrm{160}{}^{\circ }{\mathrm{14}}^{\prime }$ E, 1200 m a.s.l.)

• Andrey P. Shablinskii*, Stanislav K. Filatov, Lidiya P. Vergasova, Svetlana V. Moskaleva, Eugeniya Y. Avdontseva, and Rimma S. Bubnova

• *E-mail: shablinskii.andrey@mail.ru

• Chemically and structurally related to bubnovaite

• Trigonal: R3; structure determined

• a=15.7223(2), c=22.0160(5) Å

• 11.58(40), 5.79(22), 3.86(88), 3.67(32), 3.11(24), 3.09(26), 2.855(50), 2.682(100)

• Type material is deposited in the collections of the Saint Petersburg State University mineralogical museum, University Emb. 7/9, St. Petersburg 199034, Russia, catalogue number 1/19829

• How to cite: Shablinskii, A. P., Filatov, S. K., Vergasova, L. P., Moskaleva, S. V., Avdontseva, E. Y., and Bubnova, R. S.: Dobrovolskyite, IMA 2019-106, in: CNMNC Newsletter 54, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-275-2020, 2020.

IMA no. 2019-108

• Keplerite

• Ca₉(Ca_0.5□_0.5)Mg(PO₄)₇

• Marjalahti meteorite, fell 1 June 1902 at the northern coast of Lake Ladoga, Karelia, Russia ($\mathrm{61}{}^{\circ }{\mathrm{30}}^{\prime }$ N, $\mathrm{30}{}^{\circ }{\mathrm{30}}^{\prime }$ E – holotype); Hatrurim Formation, near Arad, Negev Desert, Israel ($\mathrm{31}{}^{\circ }{\mathrm{13}}^{\prime }{\mathrm{58}}^{\prime \prime }$ N, $\mathrm{35}{}^{\circ }{\mathrm{16}}^{\prime }{\mathrm{2}}^{\prime \prime }$ E – cotype)

• Sergey N. Britvin*, Irina O. Galuskina, Natalia S. Vlasenko, Oleg S. Vereshchagin, Vladimir N. Bocharov, Maria G. Krzhizhanovskaya, Vladimir V. Shilovskikh, Evgeny V. Galuskin, Yevgeny Vapnik, and Edita V. Obolonskaya

• *E-mail: sbritvin@gmail.com

• The Mg analogue of matyhite

• Trigonal: R3c; structure determined

• a=10.3330(4), c=37.067(2) Å

• 5.166(25), 3.424(24), 3.177(46), 2.854(100), 2.583(64), 1.915(22), 1.877(19), 1.712(28)

• Type material is deposited in the collections of the Mining Museum, Saint Petersburg Mining University, St. Petersburg, Russia, catalogue number MM74/2-1

• How to cite: Britvin, S. N., Galuskina, I. O., Vlasenko, N. S., Vereshchagin, O. S., Bocharov, V. N., Krzhizhanovskaya, M. G., Shilovskikh, V. V., Galuskin, E. V., Vapnik, Y., and Obolonskaya, E. V.: Keplerite, IMA 2019-108, in: CNMNC Newsletter 54, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-275-2020, 2020.

IMA no. 2019-111

• Tilkerodeite

• Pd₂HgSe₃

• Eskaborn adit (60 m level, 5 m N of the blind shaft IV), Tilkerode, Harz Mountains, Germany ($\mathrm{51}{}^{\circ }{\mathrm{38}}^{\prime }{\mathrm{3}}^{\prime \prime }$ N, $\mathrm{11}{}^{\circ }{\mathrm{19}}^{\prime }{\mathrm{4}}^{\prime \prime }$ E)

• Chi Ma* and Hans-Jürgen Förster

• *E-mail: chi@gps.caltech.edu

• The Pd analogue of jacutingaite

• Trigonal: $P\stackrel{\mathrm{‾}}{\mathrm{3}}m$1

• a=7.325, c=5.288 Å

• 5.288(9), 2.720(100), 2.031(34), 1.831(37), 1.519(19), 1.360(10), 1.270(10), 1.169(15)

• Type material is deposited in the collections of the Mineralogical Institute, Technische Universität Bergakademie Freiberg, Freiberg, Germany, inventory number MiSa84670

• How to cite: Ma, C. and Förster, H.-J.: Tilkerodeite, IMA 2019-111, in: CNMNC Newsletter 54, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-275-2020, 2020.

IMA no. 2018-073b

• Fleetite

• Cu₂RhIrSb₂

• Miass Placer Zone, close to the city of Miass, Chelyabinsk Oblast, Southern Urals, Russia

• Andrei Y. Barkov*, Luca Bindi, Nobumichi Tamura, Robert F. Martin, Chi Ma, Björn Winkler, Gennadiy I. Shvedov, and Wolfgang Morgenroth

• *E-mail: ore-minerals@mail.ru

• New structure type

• Cubic: Fd$\stackrel{\mathrm{‾}}{\mathrm{3}}m$; structure determined

• a=11.6682(8) Å

• 6.7(75), 4.13(100), 3.52(30), 2.679(20), 2.380(50), 2.064(40), 1.969(15), 1.556(20)

• Type material is deposited in the mineralogical collections of the State Museum of Geology of Central Siberia, 13 Partizana Zheleznyaka Street, 660021 Krasnoyarsk, Russia, catalogue number 1/41/11002

• How to cite: Barkov, A. Y., Bindi, L., Tamura, N., Martin, R. F., Ma, C., Winkler, B., Shvedov, G. I., and Morgenroth, W.: Fleetite, IMA 2018-073b, in: CNMNC Newsletter 54, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-275-2020, 2020.

IMA no. 2018-132a

• Chukochenite

• LiAl₅O₈

• Xianghualing skarn, Linwu County, Hunan Province, China ($\mathrm{25}{}^{\circ }{\mathrm{26}}^{\prime }$ N, $\mathrm{112}{}^{\circ }{\mathrm{34}}^{\prime }$ E)

• Can Rao*, Xiangping Gu, Rucheng Wang, Qunke Xia, Yuanfeng Cai, Chuanwan Dong, Frédéric Hatert, and Yantao Hao

• *E-mail: canrao@zju.edu.cn

• New structure type

• Orthorhombic: Imma; structure determined

• a=5.642(1), b=16.827(2), c=8.014(1) Å

• 2.404(53), 1.538(77), 1.412(100), 1.256(52), 1.068(36), 1.040(61), 0.999(59), 0.942(35)

• Type material is deposited in the mineralogical collections of the Geological Museum of China, no. 15 Yangrou Hutong, Xisi, Beijing 100031, People's Republic of China, catalogue number M13818

• How to cite: Rao, C., Gu, X., Wang, R., Xia, Q., Cai, Y., Dong, C., Hatert, F., and Hao, Y.: Chukochenite, IMA 2018-132a, in: CNMNC Newsletter 54, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-275-2020, 2020.

IMA no. 2018-026b

• Poirierite

• Mg₂SiO₄

• Suizhou meteorite, fell at Xihe, Zengdu District, Suizhou, Hubei, China ($\mathrm{31}{}^{\circ }{\mathrm{37}}^{\prime }$ N, $\mathrm{113}{}^{\circ }{\mathrm{28}}^{\prime }$ E – holotype); Tenham meteorite, fell at Tenham Station, Windorah, Barcoo Shire, Queensland, Australia ($\mathrm{25}{}^{\circ }{\mathrm{43}}^{\prime }{\mathrm{59}}^{\prime \prime }$ S, $\mathrm{142}{}^{\circ }{\mathrm{57}}^{\prime }{\mathrm{0}}^{\prime \prime }$ E – cotype); Miami meteorite, Texas, USA ($\mathrm{35}{}^{\circ }{\mathrm{40}}^{\prime }$ N, $\mathrm{100}{}^{\circ }{\mathrm{36}}^{\prime }$ W)

• Naotaka Tomioka*, Takuo Okuchi, Toshiaki Iitaka, Masaaki Miyahara, Luca Bindi, and Xiande Xie

• *E-mail: tomioka@jamstec.go.jp

• A polymorph of forsterite, wadsleyite and ringwoodite

• Orthorhombic: Pmma; structure determined

• a= 5.801(11), b= 2.905(9), c= 8.411(16) Å

• 3.405(54), 2.804(71), 2.742(62), 2.482(95), 2.053(82), 1.469(100), 1.453(32), 1.450(32)

• Type material is deposited in the mineralogical collections of the Museo di Storia Naturale, Università di Firenze, Via La Pira 4, I-50121, Florence, Italy, catalogue number 3238/I (holotype – Suizhou), and the Department of Geology and Paleontology, National Museum of Nature and Science, Tokyo, Japan, sample number NSM-MF15125 (cotype – Tenham)

• How to cite: Tomioka, N., Okuchi, T., Iitaka, T., Miyahara, M., Bindi, L., and Xie, X.: Poirierite, IMA 2018-026b, in: CNMNC Newsletter 54, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-275-2020, 2020.

IMA no. 2019-084

• Zaykovite

• Rh₃Se₄

• Kazan gold-bearing placer, Gogino placer zone, 100–150 km south-southeast from the city of Magnitogorsk, Chelyabinsk region, Russia ($\mathrm{52}{}^{\circ }{\mathrm{42}}^{\prime }{\mathrm{00}}^{\prime \prime }$ N, $\mathrm{60}{}^{\circ }{\mathrm{26}}^{\prime }{\mathrm{27}}^{\prime \prime }$ E)

• Elena V. Belogub*, Sergey N. Britvin, Vladimir V. Shilovskikh, Leonid A. Pautov, Vasiliy A. Kotlyarov, and Elisaveta V. Zaykova

• *E-mail: belogub_e@yahoo.com

• The Se analogue of kingstonite

• Monoclinic: C2∕m; structure determined

• a=10.877(1), b=11.192(1), c=6.4796(6) Å, β=108.887(2)^∘

• 5.43(37), 3.275(75), 3.199(100), 3.061(87), 2.568(62), 2.545(41), 3.413(34), 1.697(34)

• Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5395/1

• How to cite: Belogub, E. V., Britvin, S. N., Shilovskikh, V. V., Pautov, L. A., Kotlyarov, V. A., and Zaykova, E. V.: Zaykovite, IMA 2019-084, in: CNMNC Newsletter 54, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-275-2020, 2020.

IMA no. 2019-110

• Oxycalciomicrolite

• Ca₂Ta₂O₇

• Fumal pegmatite, Nazareno, Minas Gerais, Brazil ($\mathrm{21}{}^{\circ }{\mathrm{04}}^{\prime }{\mathrm{08.23}}^{\prime \prime }$ S, $\mathrm{44}{}^{\circ }{\mathrm{33}}^{\prime }{\mathrm{59.63}}^{\prime \prime }$ W)

• Victor Hugo Riboura Menezes da Silva*, Reiner Neumann, Ciro Alexandre Ávila, Fabiano Richard Leite Faulstich, Felipe Emerson André Alves, and Filipe Barra de Almeida

• *E-mail: vmenezes92@gmail.com

• Pyrochlore supergroup

• Cubic: Fd$\stackrel{\mathrm{‾}}{\mathrm{3}}m$; structure determined

• a=10.3803(6) Å

• 6.023(89), 3.145(44), 3.011(100), 2.608(25), 2.008(14), 1.844(48), 1.763(11), 1.573(33)

• Type material is deposited in the mineralogical collections of the Museu Nacional, Universidade Federal do Rio de Janeiro, Quinta da Boa Vista s/n, 20940-040 Rio de Janeiro, Brazil, registration number MN-7601-M

• How to cite: Menezes da Silva, V. H. R., Neumann, R., Ávila, C. A., Faulstich, F. R. L., Alves, F. E. A., and de Almeida, F. B.: Oxycalciomicrolite, IMA 2019-110, in: CNMNC Newsletter 54, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-275-2020, 2020.

IMA no. 2019-113

• Uvite

• CaMg₃(Al₅Mg)(Si₆O₁₈)(BO₃)₃(OH)₃(OH)

• Facciatoia Quarry, San Piero in Campo (LI), Elba, Tuscany, Italy ($\mathrm{42}{}^{\circ }{\mathrm{45}}^{\prime }{\mathrm{04.55}}^{\prime \prime }$ N, $\mathrm{10}{}^{\circ }{\mathrm{12}}^{\prime }{\mathrm{50.89}}^{\prime \prime }$ E)

• Ferdinando Bosi*, Cristian Biagioni, Federico Pezzotta, Henrik Skobgy, Ulf Hålenius, Jan Cempírek, Frank C. Hawthorne, Aaron J. Lussier, Yassir A. Abdu, Maxwell C. Day, Mostafa Fayek, Christine M. Clark, Joel D. Grice, and Darrell J. Henry

• *E-mail: ferdinando.bosi@uniroma1.it

• Tourmaline supergroup

• Trigonal: R3m; structure determined

• a=15.952(1), c=7.2222(5) Å

• 4.237(49), 3.994(51), 3.497(57), 2.973(88), 2.584(100), 2.047(53), 1.925(37), 1.666(26)

• Type material is deposited in the mineralogical collections of the Museo Civico di Storia Naturale, Corso Venezia 55, 20121 Milan, Italy, catalogue number M38848, and the Museo di Storia Naturale, Università di Pisa, Via Roma 79, 56011 Calci (PI), Italy, catalogue number 19911

• How to cite: Bosi, F., Biagioni, C., Pezzotta, F., Skobgy, H., Hålenius, U., Cempírek, J., Hawthorne, F. C., Lussier, A. J., Abdu, Y. A., Day, M. C., Fayek, M., Clark, C. M., Grice, J. D., and Henry, D. J.: Uvite, IMA 2019-113, in: CNMNC Newsletter 54, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-275-2020, 2020.

IMA no. 2019-114

• Rhabdoborite-(Mo)

• ${\mathrm{Mg}}_{\mathrm{12}}{\mathrm{Mo}}_{\mathrm{1.33}}^{\mathrm{6}+}{\mathrm{O}}_{\mathrm{6}}({\mathrm{BO}}_{\mathrm{3}}{)}_{\mathrm{6}}{\mathrm{F}}_{\mathrm{2}}$

• Arsenatnaya fumarole, second scoria cone of the Northern Breakthrough of the Great Tolbachik fissure eruption, Tolbachik volcano, Kamchatka, Far Eastern Region, Russia ($\mathrm{55}{}^{\circ }{\mathrm{41}}^{\prime }$ N, $\mathrm{160}{}^{\circ }{\mathrm{14}}^{\prime }$ E, 1200 m a.s.l.)

• Igor V. Pekov*, Natalia V. Zubkova, Natalia N. Koshlyakova, Dmitry I. Belakovskiy, Atali A. Agakhanov, Sergey N. Britvin, Evgeny G. Sidorov, and Dmitry Y. Pushcharovsky

• *E-mail: igorpekov@mail.ru

• Isostructural with rhabdoborite-(V) and rhabdoborite-(W)

• Hexagonal: P6₃; structure determined

• a=10.6304(3), c=4.5637(2) Å

• 9.20(100), 5.312(32), 3.483(73), 2.769(70), 2.549(40), 2.228(72), 1.702(61), 1.475(37)

• Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5464/1

• How to cite: Pekov, I. V., Zubkova, N. V., Koshlyakova, N. N., Belakovskiy, D. I., Agakhanov, A. A., Britvin, S. N., Sidorov, E. G., and Pushcharovsky, D. Y.: Rhabdoborite-(Mo), IMA 2019-114, in: CNMNC Newsletter 54, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-275-2020, 2020.

IMA no. 2019-115

• Popugaevaite

• Ca₃[B₅O₆(OH)₆]FCl₂•8H₂O

• International diamond mine, Internatsional'naya kimberlite pipe, Irelyakh river basin, 10 km southwest of the city of Mirny, Sakha Republic, Siberia, Russia

• Igor V. Pekov*, Natalia V. Zubkova, Ilya I. Chaikovskiy, Nikita V. Chukanov, Dmitry I. Belakovskiy, Vasiliy O. Yapaskurt, Yana V. Bychkova, Dmitry A. Ksenofontov, Elena P. Chirkova, Sergey N. Britvin, and Dmitry Y. Pushcharovsky

• *E-mail: igorpekov@mail.ru

• The F analogue of brianroulstonite

• Monoclinic: Pn; structure determined

• a=8.705(1), b=8.102(1), c=14.812(2) Å, β=91.367(7)^∘

• 8.12(100), 7.13(12), 4.058(27), 3.577(15), 2.936(10), 2.834(16), 2.283(10), 2.104(9)

• Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5465/1

• How to cite: Pekov, I. V., Zubkova, N. V., Chaikovskiy, I. I., Chukanov, N. V., Belakovskiy, D. I., Yapaskurt, V. O., Bychkova, Y. V., Ksenofontov, D. A., Chirkova, E. P., Britvin, S. N., and Pushcharovsky, D. Y.: Popugaevaite, IMA 2019-115, in: CNMNC Newsletter 54, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-275-2020, 2020.

IMA no. 2019-116

• Freitalite

• C₁₄H₁₀

• Königin Carola shaft, Freital, near Dresden, Saxony, Germany ($\mathrm{51}{}^{\circ }{\mathrm{00}}^{\prime }{\mathrm{10}}^{\prime \prime }$ N, $\mathrm{13}{}^{\circ }{\mathrm{38}}^{\prime }{\mathrm{18}}^{\prime \prime }$ E)

• Thomas Witzke*, Martin Schreyer, René Csuk, and Herbert Pöllmann

• *E-mail: thomas.witzke@panalytical.com

• Known synthetic analogue (anthracene)

• Monoclinic: P2₁∕a; structure determined

• a=8.5572(9), b=6.0220(5), c=11.173(1) Å, β=124.174(1)^∘

• 9.252(98), 4.877(19), 4.628(10), 4.587(100), 4.152(7), 3.538(27), 3.434(22), 3.050(20)

• Type material is deposited in the mineralogical collections of the Technische Universität Bergakademie Freiberg, Akademiestraße 6, 09599 Freiberg, Germany, specimen nos. MiSa72396 and MiSa84590

• How to cite: Witzke, T., Schreyer, M., Csuk, R., and Pöllmann, H.: Freitalite, IMA 2019-116, in: CNMNC Newsletter 54, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-275-2020, 2020.

IMA no. 2019-117

• Shuiskite-(Cr)

• Ca₂CrCr₂[SiO₄][Si₂O₆(OH)](OH)₂O

• Rudnaya underground chromite mine (level 280 m), Glavnoe Saranovskoe deposit, Saranovskaya deposits, Sarany, Middle Urals, Russia

• Inna Lykova*, Dmitry A. Varlamov, Nikita V. Chukanov, Igor V. Pekov, Dmitry I. Belakovskiy, Oleg K. Ivanov, Natalia V. Zubkova, and Sergey N. Britvin

• *E-mail: ilykova@nature.ca

• Pumpellyite group

• Monoclinic: C2∕m; structure determined

• a=19.2436(6), b=5.9999(2), c=8.8316(3) Å, β=97.833(3)^∘

• 4.759(34), 4.707(36), 3.783(75), 2.913(100), 2.755(52), 2.539(48), 2.470(39), 1.602(35)

• Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5481/1, and the Canadian Museum of Nature, 240 McLeod Street, Ottawa, ON K2P 2R1, Canada, catalogue number CMNMC 87302

• How to cite: Lykova, I., Varlamov, D. A., Chukanov, N. V., Pekov, I. V., Belakovskiy, D. I., Ivanov, O. K., Zubkova, N. V., and Britvin, S. N.: Shuiskite-(Cr), IMA 2019-117, in: CNMNC Newsletter 54, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-275-2020, 2020.

IMA no. 2019-118

• Alexkuznetsovite-(Ce)

• Ce₂Mn(CO₃)(Si₂O₇)

• Mochalin Log REE deposit, 14 km N of the city of Kyshtym, Chelyabinsk Oblast, Southern Urals, Russia ($\mathrm{55}{}^{\circ }{\mathrm{48}}^{\prime }{\mathrm{42}}^{\prime \prime }$ N, $\mathrm{60}{}^{\circ }{\mathrm{33}}^{\prime }{\mathrm{46}}^{\prime \prime }$ E)

• Anatoly V. Kasatkin*, Natalia V. Zubkova, Igor V. Pekov, Nikita V. Chukanov, Radek Škoda, Atali A. Agakhanov, and Dmitriy I. Belakovskiy

• *E-mail: anatoly.kasatkin@gmail.com

• The Ce analogue of alexkuznetsovite-(La)

• Monoclinic: P2₁∕c; structure determined

• a=6.5764(4), b=6.7685(4), c=18.749(1) Å, β=108.672(8)^∘

• 4.145(35), 3.177(26), 2.893(100), 2.797(36), 2.027(24), 1.833(26), 1.808(25), 1.686(20)

• Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5416/3

• How to cite: Kasatkin, A. V., Zubkova, N. V., Pekov, I. V., Chukanov, N. V., Škoda, R., Agakhanov, A. A., and Belakovskiy, D. I.: Alexkuznetsovite-(Ce), IMA 2019-118, in: CNMNC Newsletter 54, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-275-2020, 2020.

IMA no. 2019-120

• Biagioniite

• Tl₂SbS₂

• Museum sample from Hemlo gold deposit, Marathon, Ontario, Canada

• Luca Bindi* and Yves Moëlo

• *E-mail: luca.bindi@unifi.it

• Isostructural with dervillite

• Monoclinic: Pc; structure determined

• a=11.0895(9), b=14.3124(11), c=7.9352(6) Å, β=96.230(8)^∘

• 3.79(60), 3.68(40), 3.56(100), 3.48(40), 3.37(75), 3.16(49), 3.08(40), 3.03(60)

• Type material is deposited in the mineralogical collections of the Museo di Storia Naturale, Università di Firenze, Via La Pira 4, I-50121, Florence, Italy, catalogue number 46582/G

• How to cite: Bindi, L. and Moëlo, Y.: Biagioniite, IMA 2019-120, in: CNMNC Newsletter 54, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-275-2020, 2020.

IMA no. 2019-121

• Jasonsmithite

• ${\mathrm{Mn}}_{\mathrm{4}}^{\mathrm{2}+}\mathrm{ZnAl}$(PO₄)₄(OH)(H₂O)₇•3.5H₂O

• East dump of the Foote Lithium Company mine, Kings Mountain district, Cleveland Co., North Carolina, USA ($\mathrm{35}{}^{\circ }{\mathrm{12}}^{\prime }{\mathrm{40}}^{\prime \prime }$ N, $\mathrm{81}{}^{\circ }{\mathrm{21}}^{\prime }{\mathrm{20}}^{\prime \prime }$ W)

• Anthony R. Kampf*, Aaron J. Celestian, and Barbara P. Nash

• *E-mail: akampf@nhm.org

• New structure type

• Monoclinic: P2₁∕c; structure determined

• a=8.5822(3), b=13.1770(6), c=20.304(1) Å, β=98.485(7)^∘

• 10.98(43), 10.08(100), 7.95(18), 4.074(19), 3.029(30), 2.846(18), 2.605(29), 2.543(24)

• Type material is deposited in the mineralogical collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue numbers 74374 (holotype), 74375 (cotype) and 74376 (cotype)

• How to cite: Kampf, A. R., Celestian, A. J., and Nash, B. P.: Jasonsmithite, IMA 2019-121, in: CNMNC Newsletter 54, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-275-2020, 2020.

IMA no. 2019-122

• Johanngeorgenstadtite

• ${\mathrm{Ni}}_{\mathrm{4.5}}^{\mathrm{2}+}$(AsO₄)₃

• Johanngeorgenstadt, Erzgebirgskreis, Saxony, Germany

• Anthony R. Kampf*, Barbara P. Nash, and Jakub Plášil

• *E-mail: akampf@nhm.org

• Alluaudite supergroup

• Monoclinic: C2∕c; structure determined

• a=11.993(3), b=12.753(3), c=6.696(2) Å, β=113.302(8)^∘

• 3.514(16), 3.215(48), 3.076(18), 2.748(100), 2.623(20), 1.948(17), 1.661(28), 1.585(16)

• Type material is deposited in the mineralogical collections of the American Museum of Natural History, Central Park West and 79th Street, New York City, NY 10024, USA, catalogue number 17956

• How to cite: Kampf, A. R., Nash, B. P., and Plášil, J.: Johanngeorgenstadtite, IMA 2019-122, in: CNMNC Newsletter 54, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-275-2020, 2020.

IMA no. 2019-123

• Grguricite

• CaCr₂(CO₃)₂(OH)₄•4H₂O

• Adeghoual mine, northern outskirts of the town of Mibladen, Midelt region, Morocco ($\mathrm{32}{}^{\circ }{\mathrm{46}}^{\prime }{\mathrm{00}}^{\prime \prime }$ N, $\mathrm{4}{}^{\circ }{\mathrm{37}}^{\prime }{\mathrm{59}}^{\prime \prime }$ W)

• Mike S. Rumsey*, Mark D. Welch, John Spratt, and Annette Kleppe

• *E-mail: m.rumsey@nhm.ac.uk

• The Cr analogue of alumohydrocalcite

• Triclinic: $P\stackrel{\mathrm{‾}}{\mathrm{1}}$

• a=5.724(2), b=6.5304(9), c=14.646(4) Å, α=81.682(1), β=83.712(2), γ=86.365(2)^∘

• 7.208(45), 6.454(63), 6.222(100), 4.039(40), 3.227(87), 2.883(58), 2.648(47), 2.589(64)

• Type material is deposited in the mineralogical collections of the Natural History Museum, Cromwell Road, London SW7 5BD, United Kingdom, specimen no. BM2019,5

• How to cite: Rumsey, M. S., Welch, M. D., Spratt, J., and Kleppe, A.: Grguricite, IMA 2019-123, in: CNMNC Newsletter 54, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-275-2020, 2020.

IMA no. 2019-124

• Chukotkaite

• AgPb₇Sb₅S₁₅

• In the valley of Levyi Vulvyveem river, Amguema river basin, Iultin District, Chukotka Autonomous Okrug, Russia

• Anatoly V. Kasatkin*, Jakub Plášil, Emil Makovicky, Radek Škoda, Atali A. Agakhanov, Ilya I. Chaikovskiy, Evgeny A. Vlasov, and Igor V. Pekov

• *E-mail: anatoly.kasatkin@gmail.com

• New structure type

• Monoclinic: P2₁∕c; structure determined

• a=4.0575(3), b=35.950(1), c=19.221(2) Å, β=90.525(8)^∘

• 3.52(100), 3.38(50), 3.13(50), 2.96(30), 2.82(25), 2.26(15), 2.23(15), 1.91(50)

• Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5467/1

• How to cite: Kasatkin, A. V., Plášil, J., Makovicky, E., Škoda, R., Agakhanov, A. A., Chaikovskiy, I. I., Vlasov, E. A., and Pekov, I. V.: Chukotkaite, IMA 2019-124, in: CNMNC Newsletter 54, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-275-2020, 2020.

IMA no. 2019-125

• Luboržákite

• Mn₂AsSbS₅

• Vorontsovskoe gold deposit, ca. 13 km S of the city of Krasnoturinsk, Sverdlovskaya Oblast, Northern Urals, Russia ($\mathrm{59}{}^{\circ }{\mathrm{66}}^{\prime }{\mathrm{29}}^{\prime \prime }$ N, $\mathrm{60}{}^{\circ }{\mathrm{19}}^{\prime }{\mathrm{61}}^{\prime \prime }$ E)

• Anatoly V. Kasatkin*, Jakub Plášil, Emil Makovicky, Radek Škoda, Atali A. Agakhanov, and Sergey Y. Stepanov

• *E-mail: anatoly.kasatkin@gmail.com

• Pavonite homologous series

• Monoclinic: C2∕m; structure determined

• a=12.5077(6), b=3.8034(2), c=16.0517(8) Å, β= 94.190(4)^∘

• 3.486(50), 3.286(50), 3.262(36), 2.806(39), 2.788(57), 2.690(100), 1.904(37), 1.902(36)

• Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5498/1

• How to cite: Kasatkin, A. V., Plášil, J., Makovicky, E., Škoda, R., Agakhanov, A. A., and Stepanov, S. Y.: Luboržákite, IMA 2019-125, in: CNMNC Newsletter 54, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-275-2020, 2020.

IMA no. 2019-126

• Cuyaite

• ${\mathrm{Ca}}_{\mathrm{2}}{\mathrm{Mn}}^{\mathrm{3}+}{\mathrm{As}}_{\mathrm{14}}^{\mathrm{3}+}{\mathrm{O}}_{\mathrm{24}}\mathrm{Cl}$

• NW side of the steep Camarones Valley, ca. 9 km northeast of the village of Cuya, Arica Province, Chile

• Anthony R. Kampf*, Barbara Nash, Maurizio Dini, and Arturo A. Molina Donoso

• *E-mail: akampf@nhm.org

• New structure type

• Monoclinic: Pn; structure determined

• a=14.7231(6), b=5.5871(2), c=17.418(1) Å, β=112.451(8)^∘

• 4.73(45), 3.162(100), 3.035(28), 3.004(37), 2.931(90), 2.799(28), 1.854(23), 1.832(26)

• Type material is deposited in the mineralogical collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue number 74462

• How to cite: Kampf, A. R., Nash, B., Dini, M., and Molina Donoso, A. A.: Cuyaite, IMA 2019-126, in: CNMNC Newsletter 54, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-275-2020, 2020.

IMA no. 2019-127

• Brattforsite

• Mn₁₉As₁₂O₃₆Cl₂

• Brattforsgruvan mine, Filipstad Municipality, Värmland, Sweden ($\mathrm{59}{}^{\circ }{\mathrm{49}}^{\prime }{\mathrm{59}}^{\prime \prime }$ N, $\mathrm{14}{}^{\circ }{\mathrm{07}}^{\prime }{\mathrm{25}}^{\prime \prime }$ E, 230 m a.s.l.)

• Dan Holtstam*, Cristian Biagioni, and Ulf Hålenius

• *E-mail: dan.holtstam@nrm.se

• The Cl analogue of magnussonite, with lower symmetry

• Monoclinic: C2∕c; structure determined

• a=27.7223(9), b=19.5763(7), c=19.5806(7) Å, β=134.541(1)^∘

• 2.843(100), 2.828(99), 2.471(16), 2.448(28), 1.746(16), 1.739(25), 1.731(32), 1.475(16)

• Type material is deposited in the mineralogical collections of the Department of Geosciences, Swedish Museum of Natural History, Box 50007, SE-10405 Stockholm, Sweden, collection number GEO-NRM no. 19100303, and the Natural History Museum, University of Pisa, Via Roma 79, Calci (PI), Italy, catalogue number 19912

• How to cite: Holtstam, D., Biagioni, C., and Hålenius, U.: Brattforsite, IMA 2019-127, in: CNMNC Newsletter 54, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-275-2020, 2020.

Arctite supergroup

The arctite supergroup has been established; it currently includes nine mineral species. The supergroup is divided into the zadovite group (alternation of tetrahedral layers and antiperovskite layers – TA) and the arctite group (alternation of tetrahedral layers and triple antiperovskite layers – TA³).

Fillowite group

The fillowite group has been established; it currently includes four mineral species. The chemical formulae of the minerals of the fillowite group have been uniformed, based on nine (PO₄) groups pfu, as follows: fillowite, ${\mathrm{Na}}_{\mathrm{3}}{\mathrm{CaMn}}_{\mathrm{11}}^{\mathrm{2}+}$(PO₄)₉; johnsomervilleite, ${\mathrm{Na}}_{\mathrm{3}}{\mathrm{CaFe}}_{\mathrm{11}}^{\mathrm{2}+}({\mathrm{PO}}_{\mathrm{4}}{)}_{\mathrm{9}}$; chladniite, Na₃CaMg₁₁(PO₄)₉; galileiite, ${\mathrm{Na}}_{\mathrm{3}}{\mathrm{Fe}}^{\mathrm{2}+}{\mathrm{Fe}}_{\mathrm{11}}^{\mathrm{2}+}$(PO₄)₉. Stornesite-(Y) has been discredited since it is equivalent to Y-bearing chladniite.

Magnetoplumbite group

The magnetoplumbite group has been established; it currently includes 11 mineral species. Minerals of the magnetoplumbite group have the general formula A[B_12−x]O_19−y, with $\mathrm{0}\le x\le \mathrm{1}$ and $\mathrm{0}\le y\le \mathrm{2}$. The group is divided into subgroups, based on the dominant A cation: magnetoplumbite subgroup (A= Pb), hawthorneite subgroup (A= Ba), and yimengite subgroup (A= K). Hibonite-(Fe) has been renamed to chihuahuaite.

Walentaite group

The walentaite group has been established; it currently includes four mineral species. Minerals of the walentaite group have the general formula [(A1,A1^′,A2, □)(H₂O)n][Bx${\mathrm{As}}_{\mathrm{3}-x}^{\mathrm{3}+}$M1(M2)₂(TO₄)₂(O,OH)₇]. The group is divided into subgroups based on the dominant T cation: walentaite subgroup (T= P), and halilsarpite subgroup (T= As).

IMA 19-I: redefinition of fairbankite

Proposal 19-I is accepted, and fairbankite is redefined. The previously accepted formula was ${\mathrm{Pb}}^{\mathrm{2}+}{\mathrm{Te}}^{\mathrm{4}+}{\mathrm{O}}_{\mathrm{3}}$. Now it has been proven that sulfate group is an essential constituent and the formula has been changed to ${\mathrm{Pb}}_{\mathrm{12}}^{\mathrm{2}+}$(Te⁴⁺O₃)₁₁(SO₄).

Renaming of shuiskite

After the approval of shuiskite-(Cr) (IMA no. 2019-117; see above), and considering that the nomenclature of the pumpellyite group is based on suffixes, it was decided to change the name of the mineral shuiskite to shuiskite-(Mg). The rationale in the nomenclature of the pumpellyite group is that the root name depends on the dominant – always trivalent – cation at M2, whereas the suffix depends on the dominant cation at M1. Currently the root names are as follows: pumpellyite (M2= Al), julgoldite (M2= Fe³⁺), shuiskite (M2= Cr), okhotskite (M2= Mn³⁺), and poppiite (M2= V³⁺). The valid species are as follows: pumpellyite-(Mg), pumpellyite-(Fe²⁺), pumpellyite-(Fe³⁺), pumpellyite-(Mn²⁺), pumpellyite-(Al), julgoldite-(Fe²⁺), julgoldite-(Fe³⁺), julgoldite-(Mg), shuiskite-(Mg), shuiskite-(Cr), okhotskite, and poppiite. The latter two minerals are (still) without suffix as they stand alone with their root name.