IMA no. 2021-017a

• Ermeloite

• Al(PO₄) ⋅ H₂O

• Erm

• Mount Ermelo, Moaña, province of Pontevedra, Galicia, Spain (42^∘17^′50^′′ N, 8^∘45^′15^′′ W)

• Guillermo Zaragoza Vérez^*, Carlos J. Rodríguez Vázquez, Inés Fernández Cereijo, José González del Tánago, Ramón Jiménez Martínez, Bruno Dacuña Mariño, Ramiro Barreiro Pérez, Ezequiel Vázquez Fernández, Montse Gómez Dopazo, and Oscar Lantes-Suárez

• ^*E-mail: g.zaragoza@usc.es

• Kieserite group

• Monoclinic: $C\mathrm{2}/c$; structure determined

• a=6.5371(4), b=7.5670(5), c=7.1146(5) Å, $\mathit{\beta }=\mathrm{115.335}\left(\mathrm{2}\right){}^{\circ }$

• 4.653(67), 4.570(33), 3.275(100), 3.197(44), 2.871(25), 2.471(40), 2.449(30), 2.052(15)

• Type material is deposited in the mineralogical collections of the Museo de Historia Natural (MHN), University of Santiago de Compostela, Parque Vista Alegre s/n, 15782 Santiago de Compostela, Spain, catalogue number CM64083

• How to cite: Zaragoza Vérez, G., Rodríguez Vázquez, C. J., Fernández Cereijo, I., González del Tánago, J., Jiménez Martínez, R., Dacuña Mariño, B., Barreiro Pérez, R., Vázquez Fernández, E., Gómez Dopazo, M., and Lantes-Suárez, O.: Ermeloite, IMA 2021-017a, in: CNMNC Newsletter 68, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-385-2022, 2022.

IMA no. 2022-013

• Ziroite

• ZrO₂

• Zro

• As inclusions in corundum xenocrysts, Mount Carmel, Haifa district, Israel (32^∘44^′ N, 35^∘03^′ E)

• Chi Ma^*, William L. Griffin, Luca Bindi, Fernando Cámara, and Vered Toledo

• ^*E-mail: chima@caltech.edu

• A dimorph of baddeleyite

• Tetragonal: $P{\mathrm{4}}_{\mathrm{2}}/\mathit{\text{nmc}}$

• a=3.60(1), c=5.18(1) Å

• 2.590(32), 1.800(100), 1.478(30), 1.295(12), 1.273(30), 1.142(14), 1.051(22), 0.908(12)

• Type material is deposited in the mineralogical collections of the Università di Milano, Via Mangiagalli 34, 20133 Milano, Italy, registration number MCMGPG-H2021-003

• How to cite: Ma, C., Griffin, W. L., Bindi, L., Cámara, F., and Toledo, V.: Ziroite, IMA 2022-013, in: CNMNC Newsletter 68, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-385-2022, 2022.

IMA no. 2022-014

• Sassite

• Ti${}_{\mathrm{2}}^{\mathrm{3}+}$Ti⁴⁺O₅

• Ssi

• As inclusions in corundum xenocrysts, Mount Carmel, Haifa district, Israel (32^∘44^′ N, 35^∘03^′ E)

• Chi Ma^*, William L. Griffin, Luca Bindi, Fernando Cámara, and Vered Toledo

• ^*E-mail: chima@caltech.edu

• Pseudobrookite group

• Orthorhombic: Cmcm

• a=3.80(1), b=9.85(1), c=9.99(1) Å

• 4.925(40), 3.545(100), 2.759(74), 2.209(24), 1.980(26), 1.900(44), 1.651(25), 1.565(27)

• Type material is deposited in the mineralogical collections of the Università di Milano, Via Mangiagalli 34, 20133 Milano, Italy, registration number MCMGPG-H2021-004

• How to cite: Ma, C., Griffin, W. L., Bindi, L., Cámara, F., and Toledo, V.: Sassite, IMA 2022-014, in: CNMNC Newsletter 68, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-385-2022, 2022.

IMA no. 2022-015

• Raydemarkite

• MoO₃ ⋅ H₂O

• Rdy

• Summit group of claims, near Cookes Peak, Cookes Range, Luna Co., New Mexico, USA (32^∘33^′47^′′ N, 107^∘43^′48^′′ W)

• Hexiong Yang^*, Michael M. Scott, Ronald B. Gibbs, Robert A. Jenkins, Francis X. Sousa, and James A. McGlasson

• ^*E-mail: hyang@arizona.edu

• Known synthetic analogue

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

• a=7.3750(2), b=3.7092(1), c=6.6833(2) Å, α=108.108(1), β=112.779(2), $\mathit{\gamma }=\mathrm{91.742}\left(\mathrm{1}\right){}^{\circ }$

• 6.693(18), 5.759(100), 3.334(40), 3.277(36), 3.181(16), 3.058(18), 2.829(16), 1.852(13)

• Type material is deposited in the mineralogical collections of the University of Arizona Alfie Norville Gem and Mineral Museum, catalogue no. 22717 (holotype), and the RRUFF Project, deposition no. R210023 (cotype)

• How to cite: Yang, H., Scott, M. M., Gibbs, R. B., Jenkins, R. A., Sousa, F. X., and McGlasson, J. A.: Raydemarkite, IMA 2022-015, in: CNMNC Newsletter 68, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-385-2022, 2022.

IMA no. 2022-016

• Cherokeeite

• [Pb₂Zn(OH)₄](SO₄) ⋅ H₂O

• Chrk

• Redmond mine, Haywood Co., North Carolina, USA (35^∘40^′55^′′ N, 83^∘00^′56^′′ W)

• Anthony R. Kampf^*, Jason B. Smith, John M. Hughes, Chi Ma, and Christopher Emproto

• ^*E-mail: akampf@nhm.org

• New structure type

• Monoclinic: P2${}_{\mathrm{1}}/n$; structure determined

• a=17.1697(7), b=6.4717(2), c=17.5304(12) Å, $\mathit{\beta }=\mathrm{115.440}\left(\mathrm{8}\right){}^{\circ }$

• 5.29(100), 4.42(29), 3.197(71), 3.012(34), 2.969(29), 2.741(29), 2.595(34), 2.348(40)

• 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 numbers 76216, 76217 and 76218

• How to cite: Kampf, A. R., Smith, J. B., Hughes, J. M., Ma, C., and Emproto, C.: Cherokeeite, IMA 2022-016, in: CNMNC Newsletter 68, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-385-2022, 2022.

IMA no. 2022-017

• Pilipenkoite

• KCu(AsO₄) ⋅ H₂O

• Plp

• Arsenatnaya fumarole, Second scoria cone of the Northern Breakthrough of the Great Tolbachik Fissure Eruption, Tolbachik volcano, Kamchatka peninsula, Far-Eastern Region, Russia (55^∘41^′ N, 160^∘14^′ E, 1200 m a.s.l.)

• Igor V. Pekov^*, Sergey N. Britvin, Maria G. Krzhizhanovskaya, Atali A. Agakhanov, Natalia N. Koshlyakova, Dmitry I. Belakovskiy, Marina F. Vigasina, Vasiliy O. Yapaskurt, Anna G. Turchkova, and Maria A. Nazarova

• ^*E-mail: igorpekov@mail.ru

• New structure type

• Monoclinic: P2${}_{\mathrm{1}}/c$; structure determined

• a=10.720(1), b=6.9733(6), c=6.8383(7) Å, $\mathit{\beta }=\mathrm{93.535}\left(\mathrm{6}\right){}^{\circ }$

• 10.67(100), 4.876(18), 3.006(12), 2.955(12), 2.945(12), 2.924(19), 2.819(10), 2.797(16)

• 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 5834/1

• How to cite: Pekov, I. V., Britvin, S. N., Krzhizhanovskaya, M. G., Agakhanov, A. A., Koshlyakova, N. N., Belakovskiy, D. I., Vigasina, M. F., Yapaskurt, V. O., Turchkova, A. G., and Nazarova, M. A.: Pilipenkoite, IMA 2022-017, in: CNMNC Newsletter 68, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-385-2022, 2022.

IMA no. 2022-018

• Tomsquarryite

• NaMgAl₃(PO₄)₂(OH)₆ ⋅ 8H₂O

• Tqy

• Tom's phosphate quarry, Kapunda, South Australia, Australia (34^∘21^′33^′′ S, 138^∘59^′17^′′ E – type locality); Penrice marble quarry, Angaston, South Australia, Australia (34^∘28^′54^′′ S, 139^∘02^′48^′′ E – cotype locality)

• Peter Elliott, Ian E. Grey^*, W. Gus Mumme, Colin M. MacRae, and Anthony R. Kampf

• ^*E-mail: ian.grey@csiro.au

• Chemically and structurally related to elliottite

• Trigonal: $R\stackrel{\mathrm{‾}}{\mathrm{3}}m\mathrm{1}$; structure determined

• a=10.720(1), b=6.9733(6), c=6.8383(7) Å, $\mathit{\beta }=\mathrm{93.535}\left(\mathrm{6}\right){}^{\circ }$

• 10.24(100), 5.944(34), 5.643(32), 4.755(23), 3.499(34), 3.015(26), 2.888(33), 1.749(24)

• Type material is deposited in the mineralogical collections of the Museum of South Australia, North Terrace, Adelaide, SA 5000, Australia, catalogue numbers G35033 (Tom's holotype), G35034 (Tom's cotype) and G35031 (Penrice cotype)

• How to cite: Elliott, P., Grey, I. E., Mumme, W. G., MacRae, C. M., and Kampf, A. R.: Tomsquarryite, IMA 2022-018, in: CNMNC Newsletter 68, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-385-2022, 2022.

IMA no. 2022-019

• Heimite

• PbCu₂(AsO₄)(OH)₃ ⋅ 2H₂O

• Him

• Grosses Chalttal deposit, Mürtschenalp district, Glarus, Switzerland (47^∘04^′09.9^′′ N, 9^∘11^′26.5^′′ E)

• Thomas Malcherek^*, Boriana Mihailova, Jochen Schlüter, Philippe Roth, and Nicolas Meisser

• ^*E-mail: thomas.malcherek@uni-hamburg.de

• New structure type

• Monoclinic: P2${}_{\mathrm{1}}/n$; structure determined

• a=5.9132(5), b=7.8478(6), c=16.816(1) Å, $\mathit{\beta }=\mathrm{90.007}\left(\mathrm{6}\right){}^{\circ }$

• 8.421(72), 5.583(61), 4.073(55), 3.709(55), 3.266(51), 3.206(81), 3.143(100), 2.630(87)

• Type material is deposited in the collections of the Mineralogical Museum, Leibniz-Institut zur Analyse des Biodiversitätswandels, Grindelallee 48, 20146 Hamburg, Germany, registration number Ro3701

• How to cite: Malcherek, T., Mihailova, B., Schlüter, J., Roth, P., and Meisser, N.: Heimite, IMA 2022-019, in: CNMNC Newsletter 68, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-385-2022, 2022.

IMA no. 2022-020

• Ferro-ferri-holmquistite

• Li₂(Fe${}_{\mathrm{3}}^{\mathrm{2}+}$Fe${}_{\mathrm{2}}^{\mathrm{3}+}$)(Si₈O₂₂)(OH)₂

• Ffhlm

• Iwagi Islet, Ehime Prefecture, Japan (34^∘15^′47^′′ N, 133^∘09^′39^′′ E)

• Mariko Nagashima^*, Teruyoshi Imaoka, Takashi Kano, Jun-ichi Kimura, Qing Chang, and Takashi Matsumoto

• ^*E-mail: nagashim@yamaguchi-u.ac.jp

• Amphibole supergroup

• Orthorhombic: Pnma; structure determined

• a=18.5437(2), b=17.9222(1), c=5.3123(1) Å

• 8.256(100), 4.487(15), 3.346(11), 3.227(6), 3.043(88), 2.745(15), 2.592(3), 2.496(3)

• Type material is deposited in the mineralogical collections of the National Museum of Nature and Science, Amakubo 4-1-1, Tsukuba, Ibaraki 305-0005, Japan, specimen number NSM-M49617

• How to cite: Nagashima, M., Imaoka, T., Kano, T., Kimura, J., Chang, Q., and Matsumoto, T.: Ferro-ferri-holmquistite, IMA 2022-020, in: CNMNC Newsletter 68, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-385-2022, 2022.

IMA no. 2022-021

• Hayelasdiite

• [Pb₄O_1.5(OH)_2.5]₂[Cu${}_{\mathrm{5}}^{+}$(S₂O₃)₄(S₂O₂OH)₂(H₂O)] ⋅ 4H₂O

• Hyl

• Redmond mine, Haywood Co., North Carolina, USA (35^∘40^′55^′′ N, 83^∘00^′56^′′ W)

• Anthony R. Kampf^*, Jason B. Smith, John M. Hughes, Chi Ma, and Christopher Emproto

• ^*E-mail: akampf@nhm.org

• Chemically and structurally related to steverustite

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

• a=7.5209(1), b=14.9345(3), c=17.989(1) Å, α=106.727(8), β=90.966(6), $\mathit{\gamma }=\mathrm{90.031}\left(\mathrm{6}\right){}^{\circ }$

• 14.38(84), 6.88(72), 3.797(54), 3.331(100), 3.243(55), 3.006(73), 2.941(72), 2.868(58)

• 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 76219

• How to cite: Kampf, A. R., Smith, J. B., Hughes, J. M., Ma, C., and Emproto, C.: Hayelasdiite, IMA 2022-021, in: CNMNC Newsletter 68, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-385-2022, 2022.

IMA no. 2022-022

• Mazorite

• Ba₃(PO₄)₂

• Mzo

• Hatrurim Basin, Hatrurim Complex, Israel (31^∘11^′09^′′ N, 35^∘16^′27^′′ E)

• Rafał Juroszek^*, Irina O. Galuskina, Biljana Krüger, Hannes Krüger, Yevgeny Vapnik, and Evgeny Galuskin

• ^*E-mail: rafal.juroszek@us.edu.pl

• The Ba analogue of tuite, and the P analogue of gurimite

• Trigonal: $R\stackrel{\mathrm{‾}}{\mathrm{3}}m$; structure determined

• a=5.6617(3), c=21.170(2) Å

• 3.597(16), 3.204(100), 2.831(82), 2.224(14), 2.122(36), 1.943(21), 1.698(24), 1.394(13)

• Type material is deposited in the mineralogical collections of the Natural History Museum Bern, Bernastrasse 15, CH-3005, Bern, Switzerland, inventory number NMBE 44297

• How to cite: Juroszek, R., Galuskina, I. O., Krüger, B., Krüger, H., Vapnik, Y., and Galuskin, E.: Mazorite, IMA 2022-022, in: CNMNC Newsletter 68, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-385-2022, 2022.

IMA no. 2022-024

• Louisfuchsite

• Ca₂(Mg₄Ti₂)(Al₄Si₂)O₂₀

• Lfu

• NWA 4964 CK meteorite, found in 2007 from Northwest Africa

• Chi Ma^*, and Alexander N. Krot

• ^*E-mail: chima@caltech.edu

• Sapphirine supergroup

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

• a=10.37(1), b=10.76(1), c=8.90(1) Å, α=106.0(1), β=96.0(1), $\mathit{\gamma }=\mathrm{124.7}\left(\mathrm{1}\right){}^{\circ }$

• 3.443(36), 3.133(43), 2.940(47), 2.685(65), 2.545(100), 2.424(31), 2.105(83), 2.090(88)

• Type material is deposited in the meteorite collections at Hawaii Institute of Geophysics and Planetology, University of Hawaii, 1680 East-West Road, Honolulu, Hawaii 96822, USA, registration number NWA 4964A

• How to cite: Ma, C., and Knot, A. N.: Louisfuchsite, IMA 2022-024, in: CNMNC Newsletter 68, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-385-2022, 2022.

IMA no. 2022-025

• Zincochenite

• Pb₄Zn(OH)₆(SO₄)₂

• Zche

• Redmond mine, Haywood Co., North Carolina, USA (35^∘40^′55^′′ N, 83^∘00^′56^′′ W)

• Anthony R. Kampf^*, Jason B. Smith, John M. Hughes, Chi Ma, and Christopher Emproto

• ^*E-mail: akampf@nhm.org

• The Zn analogue of chenite

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

• a=5.883(4), b=7.938(5), c=7.948(5) Å, α=110.511(12), β=98.497(10), $\mathit{\gamma }=\mathrm{100.152}\left(\mathrm{8}\right){}^{\circ }$

• 5.64(53), 4.29(56), 3.602(100), 3.423(80), 2.848(45), 2.801(41), 2.744(44), 2.600(40)

• 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 numbers 76220, 76221 and 76222

• How to cite: Kampf, A. R., Smith, J. B., Hughes, J. M., Ma, C., and Emproto, C.: Zincochenite, IMA 2022-025, in: CNMNC Newsletter 68, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-385-2022, 2022.

IMA no. 2021-006b

• Tianhongqiite

• CrTiO₃(OH)

• Thq

• Luobusa Cr-Fe deposit, Qusum County, Tibet, China (29^∘10^′58.0^′′ N, 92^∘17^′47.6^′′ E)

• Xiangping Gu^*, Rujun Chen, Hexiong Yang, Shuangmeng Zhai, Xiande Xie, and Kai Li

• ^*E-mail: guxp2004@163.com

• The Cr analogue of tivanite

• Monoclinic: P2${}_{\mathrm{1}}/n$; structure determined

• a=7.688(1), b=4.5267(7), c=7.443(1) Å, $\mathit{\beta }=\mathrm{97.62}\left(\mathrm{1}\right){}^{\circ }$

• 3.846(100), 2.774(94), 2.616(70), 2.495(41), 2.184(37), 1.674(77), 1.654(34), 1.620(20)

• 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 M16116

• How to cite: Gu, X., Chen, R., Yang, H., Zhai, S., Xie, X., and Li, K.: Tianhongqiite, IMA 2021-006b, in: CNMNC Newsletter 68, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-385-2022, 2022.

IMA no. 2022-026

• Selsurtite

• (H₃O)₁₂Na₃(Ca₃Mn₃)(Na₂Fe)Zr₃Si[Si₂₄O₆₉(OH)₃](OH)Cl ⋅ H₂O

• Ssu

• Flora mountain, northern spur of the Selsurt mountain, Lovozero district, Murmansk Oblast, Russia (67^∘54^′42^′′ N, 34^∘48^′04^′′ E)

• Nikita V. Chukanov^*, Sergey M. Aksenov, Olga N. Kazheva, Igor V. Pekov, Dmitry A. Varlamov, Marina F. Vigasina, Dmitry I. Belakovskiy, Svetlana A. Vozchikova, and Sergey N. Britvin

• ^*E-mail: nikchukanov@yandex.ru

• Eudialyte group

• Trigonal: R3; structure determined

• a=14.1475(7), c=30.361(1) Å

• 11.38(56), 7.08(59), 5.69(36), 4.318(72), 3.793(36), 3.544(72), 2.970(100), 2.844(100)

• 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 5843/1

• How to cite: Chukanov, N. V., Aksenov, S. M., Kazheva, O. N., Pekov, I. V., Varlamov, D. A., Vigasina, M. F., Belakovskiy, D. I., Vozchikova, S. A., and Britvin, S. N.: Selsurtite, IMA 2022-026, in: CNMNC Newsletter 68, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-385-2022, 2022.

IMA no. 2022-027

• Mizraite-(Ce)

• Ce(Al₁₁Mg)O₁₉

• Miz-Ce

• As inclusions in corundum xenocrysts, Mount Carmel, Haifa district, Israel (32^∘44^′ N, 35^∘03^′ E)

• Chi Ma^*, William L. Griffin, Luca Bindi, Fernando Cámara, and Vered Toledo

• ^*E-mail: chima@caltech.edu

• Magnetoplumbite group

• Hexagonal: P6${}_{\mathrm{3}}/\mathit{\text{mmc}}$

• a=5.61(1), c=22.29(1) Å

• 11.14(61), 2.805(56), 2.663(72), 2.505(100), 2.133(52), 1.591(35), 1.556(41), 1.402(52)

• Type material is deposited in the mineralogical collections of the Università di Milano, Via Mangiagalli 34, 20133 Milano, Italy, registration number MCMGPG-H2022-005

• How to cite: Ma, C., Griffin, W. L., Bindi, L., Cámara, F., and Toledo, V.: Mizraite-(Ce), IMA 2022-027, in: CNMNC Newsletter 68, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-385-2022, 2022.

IMA no. 2022-028

• Boojumite

• Pb₈O₄(OH)₂(S₂O₃)₃

• Bjm

• Redmond mine, Haywood Co., North Carolina, USA (35^∘40^′55^′′ N, 83^∘00^′56^′′ W)

• Anthony R. Kampf^*, Jason B. Smith, John M. Hughes, Chi Ma, and Christopher Emproto

• ^*E-mail: akampf@nhm.org

• New structure type

• Orthorhombic: Pnma; structure determined

• a=14.0103(8), b=20.553(1), c=7.2668(5) Å

• 6.52(41), 3.559(38), 3.411(15), 3.160(32), 2.911(100), 2.694(14), 1.799(24), 1.613(14)

• 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 76225 (holotype) and 76226 (cotype)

• How to cite: Kampf, A. R., Smith, J. B., Hughes, J. M., Ma, C., and Emproto, C.: Boojumite, IMA 2022-028, in: CNMNC Newsletter 68, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-385-2022, 2022.

IMA no. 2022-030

• Finescreekite

• [Pb₄(OH)₄](S₂O₃)₂

• Fnck

• Redmond mine, Haywood Co., North Carolina, USA (35^∘40^′55^′′ N, 83^∘00^′56^′′ W)

• Anthony R. Kampf^*, Jason B. Smith, John M. Hughes, Chi Ma, and Christopher Emproto

• ^*E-mail: akampf@nhm.org

• Chemically and structurally related to cubothioplumbite and hexathioplumbite

• Orthorhombic: P2₁2₁2₁; structure determined

• a=8.2330(9), b=10.713(1), c=14.826(3) Å

• 6.00(78), 3.846(48), 3.701(62), 3.436(85), 3.007(100), 2.644(82), 2.045(43), 1.780(43)

• 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 76227

• How to cite: Kampf, A. R., Smith, J. B., Hughes, J. M., Ma, C., and Emproto, C.: Finescreekite, IMA 2022-030, in: CNMNC Newsletter 68, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-385-2022, 2022.

IMA no. 2022-032

• Kennygayite

• [Pb₄O₂(OH)₂](SO₄)

• Kgy

• Redmond mine, Haywood Co., North Carolina, USA (35^∘40^′55^′′ N, 83^∘00^′56^′′ W)

• Anthony R. Kampf^*, Jason B. Smith, John M. Hughes, Chi Ma, and Christopher Emproto

• ^*E-mail: akampf@nhm.org

• The sulfate analogue of sidpietersite

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

• a=6.3785(5), b=7.4519(6), c=10.3112(8) Å, α=75.234(5), β=79.388(6), $\mathit{\gamma }=\mathrm{88.175}\left(\mathrm{6}\right){}^{\circ }$

• 9.90(86), 5.78(43), 3.291(100), 3.149(98), 3.114(65), 2.892(68), 2.721(64), 1.685(40)

• 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 numbers 76229, 76230 and 76231

• How to cite: Kampf, A. R., Smith, J. B., Hughes, J. M., Ma, C., and Emproto, C.: Kennygayite, IMA 2022-032, in: CNMNC Newsletter 68, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-385-2022, 2022.

IMA no. 2022-033

• Evanichite

• Pb₆Cr³⁺(Cr⁶⁺O₄)₂(SO₄)(OH)₇FCl

• Eva

• Mammoth-Saint Anthony mine, Tiger, Pinal Co., Arizona, USA (32^∘42^′23^′′ N, 110^∘40^′59^′′ W)

• Hexiong Yang^*, Ronald B. Gibbs, Francis X. Sousa, and Robert T. Downs

• ^*E-mail: hyang@arizona.edu

• New structure type

• Trigonal: P3; structure determined

• a=7.7588(5), c=9.6161(6) Å

• 4.805(30), 3.599(100), 3.023(45), 2.473(42), 2.245(28), 2.045(17), 2.033(18), 1.903(12)

• Type material is deposited in the mineralogical collections of the University of Arizona Alfie Norville Gem and Mineral Museum, 115 N Church Ave Ste 121, Tucson, AZ 85701, USA, catalogue no. 22718 (holotype), and the RRUFF Project, deposition no. R220006 (cotype)

• How to cite: Yang, H., Gibbs, R. B., Sousa, F. X., and Downs, R. T.: Evanichite, IMA 2022-033, in: CNMNC Newsletter 68, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-385-2022, 2022.

IMA no. 2022-034

• Iskandarovite

• Sb₆O₇(SO₄)₂

• Iska

• Near the Ravat village, Kuhi-Malik area, Fan-Jagnob lignite basin, Tajikistan (39^∘11^′02^′′ N, 68^∘35^′11^′′ E)

• Mirak A. Mirakov, Leonid A. Pautov, Oleg I. Siidra^*, Vladimir Y. Karpenko, Pavel Y. Plechov, and Artem S. Borisov

• ^*E-mail: o.siidra@spbu.ru

• Known synthetic analogue

• Orthorhombic: Ccc2; structure determined

• a=12.0402(3), b=18.9599(5), c=5.8638(2) Å

• 10.1(40), 5.08(50), 3.26(25), 3.146(100), 2.933(73), 2.372(33), 1.601(32), 1.532(30)

• 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 5845/1

• How to cite: Mirakov, M. A., Pautov, L. A., Siidra, O. I., Karpenko, V. Y., Plechov, P. Y., and Borisov, A. S.: Iskandarovite, IMA 2022-034, in: CNMNC Newsletter 68, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-385-2022, 2022.

IMA no. 2022-036

• Toledoite

• TiFeSi

• Tld

• As inclusions in corundum xenocrysts, Mount Carmel, Haifa district, Israel (32^∘44^′ N, 35^∘03^′ E)

• Chi Ma^*, William L. Griffin, Luca Bindi, and Fernando Cámara

• ^*E-mail: chima@caltech.edu

• Known synthetic analogue

• Orthorhombic: Ima2

• a=7.00(1), b=10.83(1), c=6.29(1) Å

• 2.339(44), 2.333(100), 2.147(89), 2.141(38), 2.058(36), 2.052(33), 2.048(34), 1.750(36)

• Type material is deposited in the mineralogical collections of the Università di Milano, Via Mangiagalli 34, 20133 Milano, Italy, registration number MCMGPG-H2021-006

• How to cite: Ma, C., Griffin, W. L., Bindi, L., and Cámara, F.: Toledoite, IMA 2022-036, in: CNMNC Newsletter 68, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-385-2022, 2022.

3.1 IMA 22-D: borishanskiite discredited

New analyses of the holotype sample of borishanskiite (IMA no. 1974-010) show that this mineral is identical to polarite (IMA no. 1969-032). Consequently, since polarite has historical priority, borishanskiite is discredited.

3.2 Columbite supergroup

The columbite supergroup has been established. It includes 39 oxide minerals based on the general stoichiometry $M:\mathrm{O}=\mathrm{1}:\mathrm{2}$ and structurally characterized by zig-zag chains of edge-sharing octahedra. The supergroup is divided into the following: ixiolite group, wolframite group, samarskite group, columbite group, and wodginite group. A number of actions were taken on some of the minerals belonging to the supergroup; the most relevant among them are as follows:

• Polycrase-(Y) has been discredited, as it is identical to euxenite-(Y), and the latter mineral has historical priority.

• The old “ixiolite” has been redefined and results now in two distinct mineral species: ixiolite-(Mn²⁺), with end-member formula (Ta${}_{\mathrm{2}/\mathrm{3}}$Mn${}_{\mathrm{1}/\mathrm{3}}^{\mathrm{2}+}$)O₂, and ixiolite-(Fe²⁺), with end-member formula (Ta${}_{\mathrm{2}/\mathrm{3}}$Fe${}_{\mathrm{1}/\mathrm{3}}^{\mathrm{2}+}$)O₂. The type locality for both is Skogsböle, Kimito Island, Finland.

3.3 Revised formula for shkatulkalite, Na₂Nb₂Na₃Ti(Si₂O₇)₂O₂(FO)(H₂O)₄(H₂O)₃

In the IMA List of Minerals the chemical formula of shkatulkalite is given as Na₁₀MnTi₃Nb₃(Si₂O₇)₆(OH)₂F ⋅ 12H₂O. However, a crystal structure study carried out on holotype material (Can. Mineral., 60, 493–512, 2022) clearly shows that Mn is not the dominant constituent at any crystallographic site. Accordingly, the end-member formula should be written as Na₂Nb₂Na₃Ti(Si₂O₇)₂O₂(FO)(H₂O)₄(H₂O)₃. This formula matches the general formula of the minerals of the lamprophyllite group of the seidozerite supergroup, to which shkatulkalite belongs. This is an executive decision taken by the officers of the IMA-CNMNC.