NEWSLETTER 56

The information given here is provided by the IMA Commission on New Minerals, Nomenclature and Classification for comparative purposes and as a service to mineralogists working on new species.

Each mineral is described in the following format:

Mineral name, if the authors agree on its release prior to the full description appearing in press

Chemical formula

Type locality

Full authorship of proposal

E-mail address of corresponding author

Relationship to other minerals

Crystal system, Space group; Structure determined, yes or no

Unit-cell parameters

Strongest lines in the powder X-ray diffraction pattern

Type specimen repository and specimen number

Citation details for the mineral prior to publication of full description

Citation details concern the fact that this information will be published in the Mineralogical Magazine on a routine basis, as well as being added month by month to the Commission's web site.

It is still a requirement for the authors to publish a full description of the new mineral.

NO OTHER INFORMATION WILL BE RELEASED BY THE COMMISSION

NEW MINERAL PROPOSALS APPROVED IN JUNE 2020

IMA No. 2018-122a

• Zinconigerite-6N6S

• Zn₃Sn₂Al₁₆O₃₀(OH)₂

• Xianghualing skarn, Linwu County, Hunan Province, China (25°26’N, 112°34’E)

• Can Rao*, Xiangping Gu, Rucheng Wang, Qunke Xia, Frédéric Hatert and Fabrice Dal Bo

• *E-mail: canrao@zju.edu.cn

• Högbomite supergroup

• Trigonal: R $\overline 3 $m; structure determined

• a = 5.7241(2), c = 55.539(2) Å

• 2.436(100), 1.931(100), 1.650(100), 1.646(100), 1.553(62), 1.430(61), 0.935(41), 0.911(40)

• 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 M13811

• How to cite: Rao, C., Gu, X., Wang, R., Xia, Q., Hatert, F. and Dal Bo, F. (2020) Zinconigerite-6N6S, IMA 2018-122a. CNMNC Newsletter No. 56; Mineralogical Magazine, 84, https://doi.org/10.1180/mgm.2020.60

IMA No. 2020-009

• Gungerite

• TlAs₅Sb₄S₁₃

• Vorontsovskoe gold deposit, ca. 13 km S of the city of Krasnoturinsk, Sverdlovskaya Oblast, Northern Urals, Russia (59°38’52”N, 60°12’55”E)

• Anatoly V. Kasatkin*, Jakub Plášil, Emil Makovicky, Nikita V. Chukanov, Radek Škoda, Atali A. Agakhanov and Mikhail V. Tsyganko

• *E-mail: anatoly.kasatkin@gmail.com

• New structure type

• Orthorhombic: Pbcn; structure determined

• a = 20.1958(3), b = 11.5258(2), c = 20.1430(2) Å

• 5.755(100), 4.273(4), 3.705(6), 3.030(10), 2.901(10), 2.878(14), 2.850(5), 2.821(10)

• 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 5518/1

• How to cite: Kasatkin, A.V., Plášil, J., Makovicky, E., Chukanov, N.V., Škoda, R, Agakhanov, A.A. and Tsyganko, M.V. (2020) Gungerite, IMA 2020-009. CNMNC Newsletter No. 56; Mineralogical Magazine, 84, https://doi.org/10.1180/mgm.2020.60

IMA No. 2020-010

• Muonionalustaite

• Ni₃(OH)₄Cl₂⋅4H₂O

• On the corrosion crust of the Muonionalusta iron meteorite, Pajala, ca. 1.5 km NE of Lake Kitkiöjärvi, Norrbotten, Swedish Lapland, Sweden (67°50’25”N, 23°11’00”E, 254 m asl)

• Dan Holtstam*, Luca Bindi, Andreas Karlsson, Johan Söderhielm and Anders Zetterqvist

• *E-mail: dan.holtstam@nrm.se

• Known synthetic analogue

• Monoclinic: C2/m; structure determined

• a = 15.018(3), b = 3.1490(6), c = 10.502(3) Å, β = 101.535(15)°

• 10.30(100), 7.36(30), 5.49(67), 3.868(31), 2.917(14), 2.692(21), 2.409(25), 2.245(21)

• 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 numbers GEO-NRM 20050144 and 20050145

• How to cite: Holtstam, D., Bindi, L., Karlsson, A., Söderhielm, J. and Zetterqvist, A. (2020) Muonionalustaite, IMA 2020-010. CNMNC Newsletter No. 56; Mineralogical Magazine, 84, https://doi.org/10.1180/mgm.2020.60

IMA No. 2020-011

• Calcioveatchite

• SrCaB₁₁O₁₆(OH)₅⋅H₂O

• Nepskoe potassium salt deposit (drill core), Nepa River basin, Lower Tunguska, Irkutsk Oblast, Siberia, Russia (59°01’48”N, 108°00’00”E)

• Igor V. Pekov*, Natalia V. Zubkova, Vladimir N. Apollonov, Vasiliy O. Yapaskurt, Nikita V. Chukanov, Sergey N. Britvin and Dmitry Y. Pushcharovsky

• *E-mail: igorpekov@mail.ru

• The Sr/Ca-ordered analogue of veatchite

• Monoclinic: P2₁; structure determined

• a = 6.7030(3), b = 20.6438(9), c = 6.6056(3) Å, β = 119.153(7)°

• 10.35(100), 5.633(12), 5.092(10), 3.447(14), 3.362(13), 3.309(38), 2.862(10), 2.585(19)

• 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 5482/1

• How to cite: Pekov, I.V., Zubkova, N.V., Apollonov, V.N., Yapaskurt, V.O., Chukanov, N.V., Britvin, S.N. and Pushcharovsky, D.Y. (2020) Calcioveatchite, IMA 2020-011. CNMNC Newsletter No. 56; Mineralogical Magazine, 84, https://doi.org/10.1180/mgm.2020.60

IMA No. 2020-013

• Svetlanaite

• SnSe

• In quartz veins of the Ozernovskoe deposit, Kamchatka peninsula, Russia (57°35’36”N, 160°50’60”E)

• Victor M. Okrugin, Anna Vymazalová*, Vladimir V. Kozlov, František Laufek, Chris J. Stanley and Ilya Shkilsky

• *E-mail: anna.vymazalova@geology.cz

• Known synthetic analogue

• Orthorhombic: Pnma

• a = 11.52, b = 4.16, c = 4.44 Å

• 3.517(4), 2.934(7), 2.875(100), 2.378(7), 2.086(5), 2.043(4), 1.833(10), 1.437(9)

• Type material is deposited in the mineralogical collections of the Department of Earth Sciences, Natural History Museum, Cromwell Road, London SW7 5BD, United Kingdom, catalogue number BM 2020,2

• How to cite: Okrugin, V.M., Vymazalová, A., Kozlov, V.V., Laufek, F., Stanley, C.J. and Shkilsky, I. (2020) Svetlanaite, IMA 2020-013. CNMNC Newsletter No. 56; Mineralogical Magazine, 84, https://doi.org/10.1180/mgm.2020.60

IMA No. 2020-015

• Saranovskite

• SrCaFe²⁺₂(Cr₄Ti₂)Ti₁₂O₃₈

• Rudnaya underground chromite mine (depth 400 m), Glavnoe Saranovskoe deposit, Sarany town, 5 km N of the railway station Laki, Gornozavodskiy district, Permskiy Kray, Middle Urals, Russia (58°30’N, 58°52’E)

• Nikita V. Chukanov*, Ramiza K. Rastsvetaeva, Oleg K. Ivanov, Olga N. Kazheva, Igor V. Pekov, Atali A. Agakhanov, Konstantin V. Van and Sergey N. Britvin

• *E-mail: nikchukanov@yandex.ru

• Crichtonite group

• Trigonal: R $\overline 3 $; structure determined

• a = 10.3553(2), c = 20.7301(4) Å

• 3.398(75), 3.052(48), 2.881(100), 2.842(65), 2.247(67), 2.137(76), 1.597(72), 1.439(76)

• 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 5558/1

• How to cite: Chukanov, N.V., Rastsvetaeva, R.K., Ivanov, O.K., Kazheva, O.N., Pekov, I.V., Agakhanov, A.A., Van, K.V. and Britvin, S.N. (2020) Saranovskite, IMA 2020-015. CNMNC Newsletter No. 56; Mineralogical Magazine, 84, https://doi.org/10.1180/mgm.2020.60

IMA No. 2020-017

• Strontioborite

• Sr[B₈O₁₁(OH)₄]

• In cores of boreholes drilled at the Chelkar salt dome, near Chelkar (Shalkar) lake, Kazakhstan

• Igor V. Pekov*, Natalia V. Zubkova, Nikita V. Chukanov, Vasiliy O. Yapaskurt, Sergey N. Britvin and Dmitry Y. Pushcharovsky

• *E-mail: igorpekov@mail.ru

• New structure type

• Monoclinic: P2₁; structure determined

• a = 7.6192(3), b = 8.1867(2), c = 9.9164(3) Å, β = 108.357(4)°

• 7.22(100), 5.409(61), 4.090(64), 3.300(48), 3.082(28), 2.926(25), 2.121(30), 2.043(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 numbers 69851 (holotype) and ST-7069 (cotype)

• How to cite: Pekov, I.V., Zubkova, N.V., Chukanov, N.V., Yapaskurt, V.O., Britvin, S.N. and Pushcharovsky, D.Y. (2020) Strontioborite, IMA 2020-017. CNMNC Newsletter No. 56; Mineralogical Magazine, 84, https://doi.org/10.1180/mgm.2020.60

IMA No. 2020-019

• Wildcatite

• CaFe³⁺Te⁶⁺O₅(OH)

• Wildcat prospect (“high grade hill”), Detroit Mining District, Juab Co., Utah, USA (39°35’30”N, 113°06’57”W)

• Owen P. Missen, Stuart J. Mills*, Anthony R. Kampf, Mark F. Coolbaugh, Jens Najorka, Joe Marty, John Spratt, Mati Raudsepp, John K. McCormack and Mike S. Rumsey

• *E-mail: smills@museum.vic.gov.au

• New structure type

• Trigonal: P $\overline 3 $1m; structure determined

• a = 5.200(1), c = 4.967(1) Å

• 4.977(31), 3.332(100), 2.597(55), 2.301(59), 2.050(33), 1.795(88), 1.610(30), 1.499(30)

• 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, specimen numbers 74538, 74539 and 74540, the Museums Victoria, GPO Box 666, Melbourne, VIC 3001, Australia, specimen numbers M55257 and M55258, the Natural History Museum, Cromwell Road, London SW7 5BD, United Kingdom, specimen number BM 2020,4, and the W.M. Keck Earth Science and Mineral Engineering Museum, University of Nevada, 1664 N. Virginia Street, Reno, NV 89557, USA, specimen number 2020.002.001

• How to cite: Missen, O.P., Mills, S.J., Kampf, A.R., Coolbaugh, M.F., Najorka, J., Marty, J., Spratt, J., Raudsepp, M., McCormack, J.K. and Rumsey, M.S. (2020) Wildcatite, IMA 2020-019. CNMNC Newsletter No. 56; Mineralogical Magazine, 84, https://doi.org/10.1180/mgm.2020.60

IMA No. 2020-020

• Biraite-(La)

• La₂Fe²⁺(CO₃)(Si₂O₇)

• Mochalin Log REE deposit, 14 km N of the city of Kyshtym, Chelyabinsk Oblast, South Urals, Russia (55°48’42”N, 60°33’46”E)

• Anatoly V. Kasatkin*, Natalia V. Zubkova, Igor V. Pekov, Nikita V. Chukanov, Radek Škoda, Atali A. Agakhanov, Dmitriy I. Belakovskiy, Aleksey M. Kuznetsov and Dmitry Y. Pushcharovsky

• *E-mail: anatoly.kasatkin@gmail.com

• Biraite group

• Monoclinic: P2₁/c; structure determined

• a = 6.566(1), b = 6.767(1), c = 18.698(3) Å, β = 108.95(2)°

• 4.594(49), 3.723(47), 3.055(100), 2.962(66), 2.787(35), 2.690(38), 2.509(26), 1.843(33)

• 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 5557/1

• How to cite: Kasatkin, A.V., Zubkova, N.V., Pekov, I.V., Chukanov, N.V., Škoda, R., Agakhanov, A.A., Belakovskiy, D.I., Kuznetsov, A.M. and Pushcharovsky, D.Y. (2020) Biraite-(La), IMA 2020-020. CNMNC Newsletter No. 56; Mineralogical Magazine, 84, https://doi.org/10.1180/mgm.2020.60

IMA No. 2020-021

• Ferro-papikeite

• NaFe²⁺₂(Fe²⁺₃Al₂)(Si₅Al₃)O₂₂(OH)₂

• Filipstad Municipality, Värmland County, Nordmark, Sweden (59°50’37.53”N, 14°06’3.49”E)

• Frank C. Hawthorne*, Maxwell C. Day, Kees Linthout, Wim J. Lustenhouwer and Roberta Oberti

• *E-mail: frank_hawthorne@umanitoba.ca

• Amphibole supergroup

• Orthorhombic: Pnma; structure determined

• a = 18.628(4), b = 17.888(4), c = 5.303(1) Å

• 8.255(99), 3.223(39), 3.056(68), 2.674(41), 2.572(56), 2.549(38), 2.501(50), 1.991(31)

• Type material is deposited in the mineralogical collections of the Royal Ontario Museum, 100 Queens Park, Toronto, ON M5S 2C6, Canada, accession number M60100

• How to cite: Hawthorne, F.C., Day, M.C., Linthout, K., Lustenhouwer, W.J. and Oberti, R. (2020) Ferro-papikeite, IMA 2020-021. CNMNC Newsletter No. 56; Mineralogical Magazine, 84, https://doi.org/10.1180/mgm.2020.60

• NEW MINERAL PROPOSALS APPROVED IN JULY 2020

IMA No. 2020-023

• Kishonite

• VH₂

• Kishon Mid Reach zone 2, Kishon river, Haifa district, Israel

• Luca Bindi*, Fernando Cámara, William L. Griffin, Jin-Xiang Huang, Sarah E.M. Gain, Vered Toledo and Suzanne Y. O'Reilly

• *E-mail: luca.bindi@unifi.it

• Known synthetic analogue

• Cubic: Fm $\overline 3 $m; structure determined

• a = 4.268(1) Å

• 2.464(100), 2.134(42), 1.509(27), 1.287(26), 1.232(7), 0.979(10), 0.954(10), 0.871(10)

• Type material is deposited in the mineralogical collections of the Museo di Storia Naturale, Università di Firenze, Via G. La Pira 4, I-50121, Firenze, Italy, catalogue number 3364/I

• How to cite: Bindi, L., Cámara, F., Griffin, W.L., Huang, J.-X., Gain, S.E.M., Toledo, V. and O'Reilly, S.Y. (2020) Kishonite, IMA 2020-023. CNMNC Newsletter No. 56; Mineralogical Magazine, 84, https://doi.org/10.1180/mgm.2020.60

IMA No. 2020-024

• Shakhdaraite-(Y)

• ScYNb₂O₈

• Leskhozovskiy granitic pegmatite, right side of the Shakhdara river, a left tributary of the Gunt river, South-Western Pamir, Roshtkala district, Gorno-Badakhshan Autonomous Region, Tajikistan (37°11’43”N, 71°52’04”E)

• Leonid A. Pautov*, Mirak A. Mirakov, Elena Sokolova, Maxwell C. Day, Frank C. Hawthorne, Manuchekhr A. Shodibekov, Vladimir Y. Karpenko, Saimudasir Makhmadsharif and Abdulkhak R. Faiziev

• *E-mail: pla58@mail.ru

• Structurally related to brookite

• Monoclinic: P2/c; structure determined

• a = 9.930(2), b = 5.662(1), c = 5.211(1) Å, β = 92.38(3)°

• 3.72(35), 3.073(100), 2.990(85), 2.832(20), 2.603(24), 2.484(33), 1.916(23), 1.867(21)

• 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 5569/1

• How to cite: Pautov, L.A., Mirakov, M.A., Sokolova, E., Day, M.C., Hawthorne, F.C., Shodibekov, M.A., Karpenko, V.Y., Makhmadsharif, S. and Faiziev, A.R. (2020) Shakhdaraite-(Y), IMA 2020-024. CNMNC Newsletter No. 56; Mineralogical Magazine, 84, https://doi.org/10.1180/mgm.2020.60

IMA No. 2020-025

• Puttapaite

• Pb₂Mn²⁺₂ZnCr³⁺₄O₂(AsO₄)₄(OH)₆⋅12H₂O

• Beltana deposit, Puttapa, Flinders Ranges, South Australia, Australia (30°40’32”S, 138°26’04”E)

• Peter Elliott* and Anthony R. Kampf

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

• New structure type

• Monoclinic: C2/m; structure determined

• a = 12.405(3), b = 10.565(2), c = 12.311(3) Å, β = 106.06(3)°

• 11.74(100), 7.88(23), 5.223(40), 4.797(48), 3.958(44), 3.605(71), 3.013(20), 2.686(32)

• Type material is deposited in the mineralogical collections of the South Australian Museum, North Terrace, Adelaide, South Australia 5000, Australia, registration number G34869

• How to cite: Elliott, P. and Kampf, A.R. (2020) Puttapaite, IMA 2020-025. CNMNC Newsletter No. 56; Mineralogical Magazine, 84, https://doi.org/10.1180/mgm.2020.60

IMA No. 2020-026

• Anastasenkoite

• CaFe²⁺P₂O₇

• Halamish wadi (Nahal Halamish), Hatrurim basin, Negev desert, Israel (31°09’47”N, 35°17’57”E)

• Sergey N. Britvin*, Michail N. Murashko, Yevgeny Vapnik, Natalia S. Vlasenko, Oleg S. Vereshchagin, Vladimir N. Bocharov, Maria G. Krzhizhanovskaya, Maksim S. Lozhkin and Anatoly A. Zolotarev

• *E-mail: sbritvin@gmail.com

• Known synthetic analogue

• Triclinic: P $\overline 1 $; structure determined

• a = 6.576(1), b = 6.541(1), c = 6.547(1) Å, α = 67.11(1), β = 82.35(1), γ = 87.27(2)°

• 5.421(10), 3.222(29), 3.057(9), 3.052(41), 3.013(52), 2.866(100), 2.600(14), 2.159(10)

• 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 5289/1

• How to cite: Britvin, S.N., Murashko, M.N., Vapnik, Y., Vlasenko, N.S., Vereshchagin, O.S., Bocharov, V.N., Krzhizhanovskaya, M.G., Lozhkin, M.S. and Zolotarev, A.A. (2020) Anastasenkoite, IMA 2020-026. CNMNC Newsletter No. 56; Mineralogical Magazine, 84, https://doi.org/10.1180/mgm.2020.60

IMA No. 2020-027

• Selenolaurite

• RuSe₂

• Ingul gold-bearing placer, Nepryakhino placer zone, 25 km ENE of Miass, Chelyabinsk Oblast, Russia (55°04’49”N, 60°34’11”E)

• Elena V. Belogub, Sergey N. Britvin, Vladimir V. Shilovskikh, Leonid A. Pautov, Vasiliy A. Kotlyarov, Maria G. Krzhizhanovskaya, Konstantin A. Novoselov, Elisaveta V. Zaykova and Ivan A. Blinov

• *E-mail: belogub_e@yahoo.com

• The Se analogue of laurite

• Cubic: Pa $\overline 3 $; structure determined

• a = 5.9424(2) Å

• 3.434(41), 2.973(90), 2.658(100), 2.426(84), 1.791(87), 1.715(12), 1.648(18), 1,328(8)

• Type material is deposited in the mineralogical collections of the Natural Scientific Museum of the Ilmen State reserve, Miass 456317, Russia, registration number 17503

• How to cite: Belogub, E.V., Britvin, S.N., Shilovskikh, V.V., Pautov, L.A., Kotlyarov, V.A., Krzhizhanovskaya, M.G., Novoselov, K.A., Zaykova, E.V. and Blinov, I.A. (2020) Selenolaurite, IMA 2020-027. CNMNC Newsletter No. 56; Mineralogical Magazine, 84, https://doi.org/10.1180/mgm.2020.60

IMA No. 2020-028

• Monteneroite

• Cu²⁺Mn²⁺₂(AsO₄)₂⋅8H₂O

• Monte Nero mine, Rocchetta di Vara, La Spezia, Liguria, Italy (44°14’48”N, 9°45’27”E)

• Anthony R. Kampf*, Jakub Plášil, Barbara P. Nash, Marco E. Ciriotti, Fabrizio Castellaro and Luigi Chiappino

• *E-mail: akampf@nhm.org

• Structurally related to vivianite

• Monoclinic: C2/m; structure determined

• a = 10.367(1), b = 13.713(2), c = 4.8420(8) Å, β = 105.992(8)°

• 8.08(38), 6.86(100), 4.507(50), 3.287(75), 3.032(94), 2.751(88), 2.372(44), 1.938(35)

• 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 67509

• How to cite: Kampf, A.R., Plášil, J., Nash, B.P., Ciriotti, M.E., Castellano, F. and Chiappino, L. (2020) Monteneroite, IMA 2020-028. CNMNC Newsletter No. 56; Mineralogical Magazine, 84, https://doi.org/10.1180/mgm.2020.60

IMA No. 2020-029

• Magnesiohögbomite-6N12S

• Mg₅Al₁₁TiO₂₃(OH)

• DeWitts Corners area, lot 10, concession 1, Bathurst Township, Lanark County, Ontario, Canada (44°49’47”N, 76°21’05”W)

• Inna Lykova*, Ralph Rowe, Glenn Poirier, Gerald Giester and Kate Helwig

• *E-mail: ilykova@nature.ca

• Högbomite supergroup

• Trigonal: R $\overline 3 $m; structure determined

• a = 5.7194(2), c = 83.069(5) Å

• 2.921(26), 2.863(49), 2.687(29), 2.547(31), 2.434(100), 2.073(22), 1.988(23), 1.556(22)

• Type material is deposited in the mineralogical collections of the Canadian Museum of Nature, 240 McLeod Street, Ottawa, Ontario, Canada, catalogue number CMNMC 87484

• How to cite: Lykova, I., Rowe, R., Poirier, G., Giester, G. and Helwig, K. (2020) Magnesiohögbomite-6N12S, IMA 2020-029. CNMNC Newsletter No. 56; Mineralogical Magazine, 84, https://doi.org/10.1180/mgm.2020.60

IMA No. 2020-031

• Zinkgruvanite

• Ba₄Mn²⁺₄Fe³⁺₂(Si₂O₇)₂(SO₄)₂O₂(OH)₂

• Zinkgruvan Zn-Pb-Ag deposit, near Åmmeberg, Askersund Municipality, Örebro County, Sweden (58°49’N, 15°06’E)

• Fernando Cámara, Dan Holtstam*, Nils Jansson, Erik Jonsson, Andreas Karlsson, Jörgen Langhof, Jaroslaw Majka and Anders Zetterqvist

• *E-mail: dan.holtstam@nrm.se

• Ericssonite group

• Triclinic: P $\overline 1 $; structure determined

• a = 5.3982(1), b = 7.0237(1), c = 14.8108(4) Å, α = 98.256(2), β = 93.379(2), γ = 89.985(2)°

• 3.508(70), 2.980(70), 2.814(68), 2.777(70), 2.699(71), 2.680(85), 2.125(100), 2.107(96)

• 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 #20170502

• How to cite: Cámara, F., Holtstam, D., Jansson, N., Jonsson, E., Karlsson, A., Langhof, J., Majka, J. and Zetterqvist, A. (2020) Zinkgruvanite, IMA 2020-031. CNMNC Newsletter No. 56; Mineralogical Magazine, 84, https://doi.org/10.1180/mgm.2020.60

IMA No. 2020-032

• Krupičkaite

• Cu₆[AsO₃(OH)]₆⋅8H₂O

• Geister vein, 3rd Geister level of the Rovnost (Werner) mine, Jáchymov, Western Bohemia, Czech Republic (50°22’08”N, 12°53’49”E)

• Gwladys Steciuk, Jakub Plášil*, Jiří Sejkora, Jiří Čejka and Jan Hloušek

• *E-mail: plasil@fzu.cz

• Chemically and structurally close to geminite

• Monoclinic: P2₁/n; structure determined

• a = 15.504(7), b = 18.144(7), c = 10.563(5) Å, β = 103.30(4)°

• 9.089(100), 4.394(0.5), 3.909(0.5), 3.533(1.0), 3.369(0.5), 3.244(0.4), 2.972(0.9), 2.937(0.5)

• Type material is deposited in the mineralogical collections of the Department of Mineralogy and Petrology, National Museum in Prague, Cirkusová 1740, 19300 Praha 9, Czech Republic, catalogue number P1P 18/2020

• How to cite: Steciuk, G., Plášil, J., Sejkora, J., Čejka, J. and Hloušek, J. (2020) Krupičkaite, IMA 2020-032. CNMNC Newsletter No. 56; Mineralogical Magazine, 84, https://doi.org/10.1180/mgm.2020.60

IMA No. 2020-004a

• Allantoin

• C₄H₆N₄O₃

• Rowley mine 125-foot level, ca. 20 km NW of Theba, Maricopa Co., Arizona, USA (33°02’57”N, 113°01’50”W)

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

• *E-mail: akampf@nhm.org

• Known synthetic analogue

• Monoclinic: P2₁/c; structure determined

• a = 8.0304(9), b = 5.1596(5), c = 14.801(2) Å, β = 93.017(7)°

• 5.567(31), 4.864(37), 4.341(30), 4.197(100), 3.604(40), 3.190(33), 3.010(51), 2.809(42)

• 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 74491

• How to cite: Kampf, A.R., Celestian, A.J., Nash, B.P. and Marty, J. (2020) Allantoin, IMA 2020-004a. CNMNC Newsletter No. 56; Mineralogical Magazine, 84, https://doi.org/10.1180/mgm.2020.60

NOMENCLATURE/CLASSIFICATION PROPOSALS APPROVED IN JULY 2020

IMA 20-C: Crystal structure and redefinition of utahite

Proposal 20-C is accepted, and the formula of utahite is redefined from Cu²⁺₅Zn₃(Te⁶⁺O₄)₄(OH)₈⋅7H₂O to MgCu²⁺₄Zn₂Te⁶⁺₃O₁₄(OH)₄⋅6H₂O

Margarosanite group

The margarosanite group is established and includes the three isostructural members: margarosanite, walstromite and breyite.

Pascoite family

The pascoite family is established and consists of 20 V minerals. The family consists of the pascoite and lasalite groups as well as a number of ungrouped members. In addition, the formula of rakovanite has been revised from Na₃[H₃V₁₀O₂₈]⋅15H₂O to (NH₄)₃Na₃[V₁₀O₂₈]⋅12H₂O.