IMA no. 2020-014

• Katsarosite

• Zn(C₂O₄)•2H₂O

• Esperanza Mine, Lavrion Mining District, Attica Prefecture, Greece (37^∘43^′31^′′ N, 24^∘01^′56^′′ E)

• Branko Rieck*, Gerald Giester, Christian Lengauer, and Lutz Nasdala

• *E-mail: rieckb49@univie.ac.at

• The Zn analogue of humboldtine

• Monoclinic: C2/c; structure determined

• a=11.768(3), b=5.388(1), c=9.804(2) Å,
  β=127.045(8)^∘

• 4.768(94), 4.703(37), 4.674(100), 3.927(33), 3.569(27), 2.953(51), 2.657(22), 2.556(14)

• Type material is deposited in the collections of the Institut für Mineralogie und Kristallographie der Universität Wien, Althanstrasse 14, 1090 Vienna, Austria, catalogue number HS13.977 (holotype); the Mineralogical Museum of Lavrio, Andrea Kordella Ave., 19500 Lavrio, Greece, catalogue number T3201 (cotype)

• How to cite: Rieck, B., Giester, G., Lengauer, C., and Nasdala, L.: Katsarosite, IMA 2020-014, in: CNMNC Newsletter 57, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-495-2020, 2020.

IMA no. 2020-022

• Bahariyaite

• KMnO₄

• On the western edge of the Bahariya Oasis, Western Desert, Egypt (28^∘02^′31^′′ N, 28^∘36^′59^′′ E)

• Hassan M. Helmy*, Harald J. Euler, Frank Tomaschek, Chris Ballhaus, and Hans Henning Friedrich

• *E-mail: hmhelmy@mu.edu.eg

• Known synthetic analogue

• Orthorhombic: Pnma; structure determined

• a=9.1186(6), b=5.7224(6), c=7.4332(5) Å

• 4.533(24), 3.714(35), 3.565(100), 3.215(77), 2.947(41), 2.860(27), 2.179(26), 2.176(18)

• Type material is deposited in the collections of the Mineralogical Museum of the University of Bonn, Poppelsdorfer Schloss, Meckenheimer Allee 169, 53115 Bonn, Germany, catalogue number 40651

• How to cite: Helmy, H. M., Euler, H. J., Tomaschek, F., Ballhaus, C., and Friedrich, H. H.: Bahariyaite, IMA 2020-022, in: CNMNC Newsletter 57, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-495-2020, 2020.

IMA no. 2020-033

• Hasanovite

• KNa(MoO₂)(SO₄)₂

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

• Mirak A. Mirakov, Leonid A. Pautov, Oleg I. Siidra*, Saimudasir Makhmadsharif, Vladimir Y. Karpenko, and Pavel Y. Plechov

• *E-mail: o.siidra@spbu.ru

• New structure type

• Monoclinic: P2₁/c; structure determined

• a=9.6225(2), b=11.4049(3), c=8.1421(2) Å,
  β=99.179(1)^∘

• 6.57(48), 4.34(75), 3.64(100), 3.44(58), 3.34(74), 3.20(63), 2.879(73), 2.729(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 5568/1

• How to cite: Mirakov, M. A., Pautov, L. A., Siidra, O. I., Makhmadsharif, S., Karpenko, V. Y., and Plechov, P. Y.: Hasanovite, IMA 2020-033, in: CNMNC Newsletter 57, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-495-2020, 2020.

IMA no. 2020-034

• Hrabákite

• Ni₉PbSbS₈

• At the mine dump of shaft no. 9, Jerusalem, Příbram ore district, central Bohemia, Czech Republic (49^∘40^′12.806^′′ N, 14^∘01^′48.102^′′ E)

• Jiří Sejkora*, Pavel Škácha, Jakub Plášil, Zdeněk Dolníček, and Jana Ulmanová

• *E-mail: jiri_sejkora@nm.cz

• Hauchecornite group

• Tetragonal: P4/mmm; structure determined

• a=7.3085(4), c=5.3969(3) Å

• 3.654(57), 3.268(68), 2.796(100), 2.392(87), 2.311(78), 1.866(74), 1.808(71), 1.723(52)

• Cotype material is deposited in the collections of the Department of Mineralogy and Petrology, National Museum in Prague, Cirkusová 1740, 19300 Prague 9, Czech Republic, catalogue number P1P 30/2020; the Mining Museum Příbram, Hynka Kličky Place 293, 26101 Příbram VI, Březové Hory, Czech Republic, catalogue number 1/2020

• How to cite: Sejkora, J., Škácha, P., Plášil, J., Dolníček, Z., and Ulmanová, J.: Hrabákite, IMA 2020-034, in: CNMNC Newsletter 57, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-495-2020, 2020.

IMA no. 2020-035

• Manganobadalovite

• NaNaMn(MgFe³⁺)(AsO₄)₃

• 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.)

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

• *E-mail: nkoshlyakova@gmail.com

• Alluaudite supergroup

• Monoclinic: C2/c; structure determined

• a=12.1848(5), b=12.8924(4), c=6.6970(3) Å,
  β=113.113(5)^∘

• 6.43(30), 3.589(32), 3.215(38), 3.079(23), 2.941(32), 2.788(100), 2.649(22), 2.626(25)

• 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 5487/1

• How to cite: Koshlyakova, N. N., Pekov, I. V., Belakovskiy, D. I., Vigasina, M. F., Zubkova, N. V., Agakhanov, A. A., Britvin, S. N., Sidorov, E. G., and Pushcharovsky, D. Y.: Manganobadalovite, IMA 2020-035, in: CNMNC Newsletter 57, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-495-2020, 2020.

IMA no. 2020-037

• Bojarite

• Cu₃(N₃C₂H₂)₃(OH)Cl₂•6H₂O

• In a guano deposit, northern slope of Pabellón de Pica Mountain, 1.5 km S of Chanabaya village, Iquique Province, Tarapacá Region, Chile (22^∘55^′ S, 70^∘08^′ W)

• Nikita V. Chukanov*, Gerhard Möhn, Natalia V. Zubkova, Dmitry A. Ksenofontov, Igor V. Pekov, Atali A. Agakhanov, Sergey N. Britvin, and Joy Desor

• *E-mail: nikchukanov@yandex.ru

• New structure type

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

• a=24.8047(5) Å

• 8.83(31), 7.19(100), 6.23(35), 5.077(28), 4.194(28), 4.143(40), 3.584(23), 2.865(28)

• 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 5574/1

• How to cite: Chukanov, N. V., Möhn, G., Zubkova, N. V., Ksenofontov, D. A., Pekov, I. V., Agakhanov, A. A., Britvin, S. N., and Desor, J.: Bojarite, IMA 2020-037, in: CNMNC Newsletter 57, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-495-2020, 2020.

IMA no. 2020-039

• Panskyite

• Pd₉Ag₂Pb₂S₄

• Southern Kievey Fedorovo–Pana layered intrusion, Kola Peninsula, Russia (67^∘29^′05^′′ N, 35^∘35^′02^′′ E)

• Anna Vymazalová*, Viktor V. Subbotin, František Laufek, Yevgeny E. Savchenko, Chris J. Stanley, Dmitriy A. Gabov, and Jakub Plášil

• *E-mail: anna.vymazalova@geology.cz

• The Pb analogue of thalhammerite

• Tetragonal: I4/mmm

• a=7.98, c=9.14 Å

• 2.826(50), 2.404(100), 2.320(72), 2.288(44), 2.212(24), 1.998(67), 1.505(28), 1.218(25)

• Type material is deposited in the mineralogical collections of the Department of Earth Sciences, Natural History Museum, London SW7 5BD, United Kingdom, catalogue number BM2020,2

• How to cite: Vymazalová, A., Subbotin, V. V., Laufek, F., Savchenko, Y. E., Stanley, C. J., Gabov, D. A., and Plášil, J.: Panskyite, IMA 2020-039, in: CNMNC Newsletter 57, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-495-2020, 2020.

IMA no. 2020-042

• Thunderbayite

• TlAg₃Au₃Sb₇S₆

• Hemlo gold deposit, ca. 35 km E of Marathon, Ontario, Canada (48^∘41^′41^′′ N, 85^∘54^′13^′′ W)

• Luca Bindi* and Andrew C. Roberts

• *E-mail: luca.bindi@unifi.it

• Chemically related to criddleite

• Triclinic: P1; structure determined

• a=8.088(3), b=7.854(3), c=20.078(8) Å, α=92.52(3), β=93.71(3), γ=90.15(4)^∘

• 5.63(30), 4.04(100), 3.92(80), 3.60(30), 3.53(30), 2.815(50), 2.727(40), 2.566(45)

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

• How to cite: Bindi, L. and Roberts, A. C.: Thunderbayite, IMA 2020-042, in: CNMNC Newsletter 57, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-495-2020, 2020.

IMA no. 2020-045

• Kufahrite

• PtPb

• Ledyanoy Creek placer, Galmoenan massif, Koryak Highlands, Kamchatka, Russia (61^∘00^′ N, 166^∘05^′ E)

• Evgeniy G. Sidorov, Anton V. Kutyrev*, Elena S. Zhitova, Atali A. Agakhanov, Elena I. Sandimirova, Anna Vymazalova, and Valery M. Chubarov

• *E-mail: anton.v.kutyrev@gmail.com

• Known synthetic analogue

• Hexagonal: P6₃/mmc

• a=4.2492(6), c=5.486(6) Å

• 3.052(80), 2.197(00), 2.125(28), 1.747(18), 1.528(35), 1.350(14), 1.240(18), 0.958(22)

• 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 5576/1

• How to cite: Sidorov, E. G., Kutyrev, A. V., Zhitova, E. S., Agakhanov, A. A., Sandimirova, E. I., Vymazalova, A., and Chubarov, V. M.: Kufahrite, IMA 2020-045, in: CNMNC Newsletter 57, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-495-2020, 2020.

IMA no. 2020-046

• Airdite

• Sr(V⁴⁺O)₂(PO₄)₂•4H₂O

• In the dumps of the Spring Creek copper mine, 10 km S of Wilmington, South Australia, Australia (32^∘43^′52^′′ S, 138^∘07^′37^′′ E)

• Peter Elliott* and Anthony R. Kampf

• *E-mail: peter.elliott@adelaide.edu.au

• Known synthetic analogue

• Monoclinic: Cc; structure determined

• a=9.006(2), b=8.991(2), c=12.796(3) Å,
  β=100.25(3)^∘

• 6.362(75), 4.294(24), 3.183(100), 3.011(78), 2.833(20), 2.786(30), 2.017(54), 1.588(33)

• Type material is deposited in the mineralogical collections of the South Australian Museum, North Terrace, Adelaide, South Australia 5000, Australia, registration number G34890

• How to cite: Elliott, P. and Kampf, A. R.: Airdite, IMA 2020-046, in: CNMNC Newsletter 57, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-495-2020, 2020.

IMA no. 2020-047

• Auerbakhite

• MnTl₂As₂S₅

• Vorontsovskoe gold deposit, ca. 13 km S of the city of Krasnoturinsk, Sverdlovsk oblast, Northern Urals, Russia (59^∘65^′29^′′ N, 60^∘21^′33^′′ E)

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

• *E-mail: anatoly.kasatkin@gmail.com

• Known synthetic analogue

• Orthorhombic: Cmce; structure determined

• a=15.328(1), b=7.662(7), c=16.633(1) Å

• 6.337(22), 5.636(14), 3.831(34), 3.480(33), 3.374(100), 2.993(62), 2.576(19), 2.532(18)

• 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 5579/1

• How to cite: Kasatkin, A. V., Plášil, J., Makovicky, E., Chukanov, N. V., Škoda, R., Agakhanov, A. A., and Stepanov, S. Y.: Auerbakhite, IMA 2020-047, in: CNMNC Newsletter 57, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-495-2020, 2020.

IMA no. 2020-049

• Argentopearceite

• Ag₁₆As₂S₁₁

• In the dumps of the Lehnschafter mine, Mikulov–Hrob ore district, 9 km NW of Teplice, Krušné hory (Erzgebirge), Czech Republic (50^∘41^′26.960^′′ N, 13^∘43^′16.547^′′ E)

• Jiří Sejkora*, Jakub Plášil, Emil Makovicky, Pavel Škácha, Zdeněk Dolníček, and Roman Gramblička

• *E-mail: jiri.sejkora@nm.cz

• Polybasite group

• Trigonal: P321; structure determined

• a=14.8583(5), c=12.3038(5) Å

• 12.348(17), 3.120(62), 3.085(100), 2.858(38), 2.537(36), 2.391(24), 2.376(19), 1.861(19)

• Type material is deposited in the collections of the Department of Mineralogy and Petrology, National Museum in Prague, Cirkusová 1740, 19300 Prague 9, Czech Republic, catalogue number P1P 35/2020

• How to cite: Sejkora, J., Plášil, J., Makovicky, E., Škácha, P., Dolníček, Z., and Gramblička, R.: Argentopearceite, IMA 2020-049, in: CNMNC Newsletter 57, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-495-2020, 2020.

IMA no. 2020-050

• Magnesioalterite

• ${\mathrm{Mg}}_{\mathrm{2}}{\mathrm{Fe}}_{\mathrm{4}}^{\mathrm{3}+}\left({\mathrm{SO}}_{\mathrm{4}}{)}_{\mathrm{4}}\right({\mathrm{C}}_{\mathrm{2}}{\mathrm{O}}_{\mathrm{4}}{)}_{\mathrm{2}}(\mathrm{OH}{)}_{\mathrm{4}}\mathrm{•}\mathrm{17}{\mathrm{H}}_{\mathrm{2}}\mathrm{O}$

• Cliff Dwellers Lodge, Vermilion Cliffs, Coconino Co., Arizona, USA (36^∘43^′01^′′ N, 111^∘47^′36^′′ W)

• Hexiong Yang*, Ronald B. Gibbs, Stanley H. Evans, Robert T. Downs, and Zak Jibrin

• *E-mail: hyang@arizona.edu

• The Mg analogue of alterite

• Monoclinic: C2/c; structure determined

• a=16.766(1), b=9.4074(7), c=25.351(3) Å,
  β=108.258(5)^∘

• 5.854(100), 4.593(36), 4.377(46), 4.204(38), 4.142(35), 3.914(34), 3.717(67), 2.668(47)

• Type material is deposited in the collections of the University of Arizona Mineral Museum, 1601 E University Blvd, Tucson, AZ 85719, USA, catalogue number 22042 (holotype); the RRUFF Project, deposition number R180015 (cotype)

• How to cite: Yang, H., Gibbs, R. B., Evans, S. H., Downs, R. T., and Jibrin, Z.: Magnesioalterite, IMA 2020-050, in: CNMNC Newsletter 57, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-495-2020, 2020.

IMA no. 2018-143a

• Botuobinskite

• ${\mathrm{SrFe}}^{\mathrm{2}+}\left({\mathrm{Ti}}_{\mathrm{12}}^{\mathrm{4}+}{\mathrm{Cr}}_{\mathrm{6}}^{\mathrm{3}+}\right){\mathrm{Mg}}_{\mathrm{2}}\left[{\mathrm{O}}_{\mathrm{36}}\right(\mathrm{OH}{)}_{\mathrm{2}}]$

• As inclusions in pyrope from the Internatsionalnaya kimberlite pipe, Mirny kimberlite field, Siberian craton, Sakha Republic, Russia (62^∘27^′42^′′ N, 113^∘42^′57^′′ E)

• Dmitriy I. Rezvukhin*, Sergey V. Rashchenko, Igor S. Sharygin, Vladimir G. Malkovets, Taisia A. Alifirova, Leonid A. Pautov, Elena N. Nigmatulina, and Yurii V. Seryotkin

• *E-mail: m.rezvukhin@igm.nsc.ru

• Crichtonite group

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

• a=10.3644(8), c=20.659(1) Å

• 3.388(100), 3.040(65), 2.868(71), 2.836(75), 2.132(89), 1.792(70), 1.590(87), 1.437(91)

• Type material is deposited in the mineralogical collections of the Central Siberian Geological Museum, Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, Koptyuga Avenue 3, Novosibirsk 630090, Russia, catalogue number VII-99/1

• How to cite: Rezvukhin, D. I., Rashchenko, S. V., Sharygin, I. S., Malkovets, V. G., Alifirova, T. A., Pautov, L. A., Nigmatulina, E. N., and Seryotkin, Y. V.: Botuobinskite, IMA 2018-143a, in: CNMNC Newsletter 57, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-495-2020, 2020.

IMA no. 2018-144a

• Mirnyite

• ${\mathrm{SrZr}}^{\mathrm{4}+}\left({\mathrm{Ti}}_{\mathrm{12}}^{\mathrm{4}+}{\mathrm{Cr}}_{\mathrm{6}}^{\mathrm{3}+}\right){\mathrm{Mg}}_{\mathrm{2}}{\mathrm{O}}_{\mathrm{38}}$

• As inclusions in pyrope from the Internatsionalnaya kimberlite pipe, Mirny kimberlite field, Siberian craton, Sakha Republic, Russia (62^∘27^′42^′′ N, 113^∘42^′57^′′ E)

• Dmitriy I. Rezvukhin*, Sergey V. Rashchenko, Igor S. Sharygin, Vladimir G. Malkovets, Taisia A. Alifirova, Leonid A. Pautov, Elena N. Nigmatulina, and Yurii V. Seryotkin

• *E-mail: m.rezvukhin@igm.nsc.ru

• Crichtonite group

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

• a=10.3734(8), c=20.691(1) Å

• 3.392(100), 3.043(73), 2.872(71), 2.839(76), 2.135(79), 1.794(70), 1.592(85), 1.439(88)

• Type material is deposited in the mineralogical collections of the Central Siberian Geological Museum, Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, Koptyuga Avenue 3, Novosibirsk 630090, Russia, catalogue number VII-100/1

• How to cite: Rezvukhin, D. I., Rashchenko, S. V., Sharygin, I. S., Malkovets, V. G., Alifirova, T. A., Pautov, L. A., Nigmatulina, E. N., and Seryotkin, Y. V.: Mirnyite, IMA 2018-144a, in: CNMNC Newsletter 57, Eur. J. Mineral., 32, https://doi.org/10.5194/ejm-32-495-2020, 2020.

IMA 20-D: wöhlerite group

Proposal 20-D is accepted and the wöhlerite group is established. It currently includes nine mineral species: cuspidine, baghdadite, burpalite, låvenite, normandite, niocalite, janhaugite, wöhlerite, and hiortdahlite. The chemical formula of the latter mineral has been revised to Na₂Ca₄(Ca_0.5Zr_0.5)Zr(Si₂O₇)₂OF₃. Marianoite has been discredited as it is identical to wöhlerite.

Cerite supergroup

The cerite supergroup has been established and includes the cerite group (five members) and merrillite group (eight members). Cerite-(La) has been renamed ferricerite-(La) since Fe is dominant in the M site. It has the formula $(\mathrm{La},\mathrm{Ce},\mathrm{Ca}{)}_{\mathrm{9}}{\mathrm{Fe}}^{\mathrm{3}+}({\mathrm{SiO}}_{\mathrm{4}}{)}_{\mathrm{3}}\left({\mathrm{SiO}}_{\mathrm{3}}\mathrm{OH}{)}_{\mathrm{4}}\right(\mathrm{OH}{)}_{\mathrm{3}}$.