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 AUGUST 2017

IMA No. 2017-040

Gorbunovite

CsLi2(Ti,Fe)Si4O10(F,OH,O)2

Darai-Pioz glacier, Alai mountain range, Tien-Shan, Rashtskiy district, Tajikistan (39°30′N, 70°40′E)

Atali A. Agakhanov*, Leonid A. Pautov, Igor V. Pekov, Vladimir Y. Karpenko, Oleg I. Siidra, Elena Sokolova, Frank C. Hawthorne, Vyacheslav A. Muftakhov and Anatoly V. Kasatkin

*E-mail: atali99@mail.ru

Mica group

Monoclinic: C2/m, C2 or Cm

a = 5.236(2), b = 9.054(4), c = 10.767(4) Å, β =99.61(4)°

4.49(25), 3.69(46), 3.45(34), 2.991(42), 2.608(77), 2.581(100), 2.240(33), 2.188(62)

Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia, registration number 4936/1

How to cite: Agakhanov, A.A., Pautov, L.A., Pekov, I.V., Karpenko, V.Y., Siidra, O.I., Sokolova, E., Hawthorne, F.C., Muftakhov, V.A. and Kasatkin, A.V. (2017) Gorbunovite, IMA 2017-040. CNMNC Newsletter No. 39, October 2017, page 1280; Mineralogical Magazine, 81, 1279–1286.

IMA No. 2017-043

Rinkite-(Y)

Na2Ca4YTi(Si2O7)2OF3

Darai-Pioz alkaline massif, Alai mountain range, Tien-Shan, Rashtskiy district, Tajikistan (39°30′N, 70°40′E)

Leonid A. Pautov, Atali A. Agakhanov*, Vladimir Y. Karpenko, Yulia A. Uvarova, Elena Sokolova and Frank C. Hawthorne

*E-mail: atali99@mail.ru

Seidozerite supergroup

Monoclinic: P21/c; structure determined

a = 7.3934(5), b = 5.6347(4), c = 18.713(1) Å, β = 101.415(2)°

9.18(24), 4.26(8), 3.559(15), 3.057(100), 2.929(17), 2.783(14), 2.688(28), 2.293(15)

Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia, registration number 5043/1

How to cite: Pautov, L.A., Agakhanov, A.A., Karpenko, V.Y., Uvarova, Y.A., Sokolova, E. and Hawthorne, F.C. (2017) Rinkite-(Y), IMA 2017-043. CNMNC Newsletter No. 39, October 2017, page 1280; Mineralogical Magazine, 81, 1279–1286.

IMA No. 2017-044

Kalithallite

K3Tl3+Cl6·2H2O

Northern fumarole field, First 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 asl)

Igor V. Pekov*, Maria G. Krzhizhanovskaya, Vasiliy O. Yapaskurt, Dmitry I. Belakovskiy and Evgeny G. Sidorov

*E-mail: igorpekov@mail.ru

Known synthetic analogue

Tetragonal: I4/mmm; structure determined

a = 15.9336(6), c = 18.1018(8) Å

5.981(100), 5.636(36), 3.984(20), 3.528(30), 3.315(22), 2.890(15), 2.817(24), 2.201(11)

Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia, registration number 5066/1

How to cite: Pekov, I.V., Krzhizhanovskaya, M.G., Yapaskurt, V.O., Belakovskiy, D.I. and Sidorov, E.G. (2017) Kalithallite, IMA 2017-044. CNMNC Newsletter No. 39, October 2017, page 1280; Mineralogical Magazine, 81, 1279–1286.

IMA No. 2017-045

Strontioruizite

Sr2forumlaSi4O11(OH)4·2H2O

N'Chwaning III mine, Kalahari Manganese Fields, Northern Cape Province, South Africa (27°7′50.81″S, 22°50′28.83″E)

Hexiong Yang*, Bruce Cairncross, Xiangping Gu, Tommy Yong and Robert T. Downs

*E-mail: hyang@email.arizona.edu

The Sr analogue of ruizite

Monoclinic: C2; structure determined

a = 9.1575(4), b = 6.2857(4), c = 12.0431(6) Å, β = 91.744(4)°

4.762(42), 4.549(41), 4.219(46), 3.143(100), 2.972(39), 2.785(61), 2.693(37), 2.620(41)

Cotype material is deposited in the collections of the Mineral Museum, University of Arizona, Tucson, USA, catalogue # 21486, and the RRUFF Project, deposition # R160085

How to cite: Yang, H., Cairncross, B., Gu, X., Yong, T. and Downs, R.T. (2017) Strontioruizite, IMA 2017-045. CNMNC Newsletter No. 39, October 2017, page 1280; Mineralogical Magazine, 81, 1279–1286.

IMA No. 2017-046

Barwoodite

forumlaNb5+(SiO4)2O3(OH)3

Big Rock quarry, Granite Mountain, Little Rock, Pulaski Co., Arkansas, USA (34°41′27″N, 92°17′17″W)

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

*E-mail: akampf@nhm.org

Welinite group

Trigonal: P3; structure determined

a = 8.2139(10), c = 4.8117(4) Å

3.994(34), 3.125(95), 2.858(56), 2.688(57), 2.349(81), 1.793(100), 1.669(23), 1.550(75)

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 66634, 66635, 66636 and 66637

How to cite: Kampf, A.R., Celestian, A.J. and Nash, B.P. (2017) Barwoodite, IMA 2017-046. CNMNC Newsletter No. 39, October 2017, page 1281; Mineralogical Magazine, 81, 1279–1286.

IMA No. 2017-047

Maohokite

MgFe2O4

Xiuyan crater, Liaodong Peninsula, China (40°21′55″N, 123°27′34″E)

Ming Chen*, Jinfu Shu, Xiande Xie and Dayong Tan

*E-mail: mchen@gig.ac.cn

A polymorph of magnesioferrite

Orthorhombic: Pnma

a = 8.907(1), b = 9.937(8), c = 2.981(1) Å

2.663(100), 1.932(90), 1.673(20), 1.533(50), 1.431(12), 1.155(15), 1.131(12), 1.087(30)

Type material is deposited in the mineralogical collections of the Geological Museum, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Tianhe, Kehua Street 511, Guangzhou 510640, China, catalogue number XY-shock gneiss 290

How to cite: Chen, M., Shu, J., Xie, X. and Tan, D. (2017) Maohokite, IMA 2017-047. CNMNC Newsletter No. 39, October 2017, page 1281; Mineralogical Magazine, 81, 1279–1286.

IMA No. 2017-048

Graftonite-(Ca)

Caforumla(PO4)2

Michałkowa, in the middle part of the Góry Sowie Block, ∼70  km SW of Wrocław, Poland (50°45′N, 16°27′E)

Adam Pieczka, Frank C. Hawthorne*, Neil Ball, Yassir Abdu and Bożena Gołębiowska

*E-mail: frank_hawthorne@umanitoba.ca

Graftonite group

Monoclinic: P21/c; structure determined

a = 8.792(2), b = 11.743(2), c = 6.169(1) Å, β =99.35(3)°

3.654(100), 3.133(56), 3.097(57), 3.042(76), 3.014(77), 2.979(85), 2.834(68), 2.542(30)

Type material is deposited in the collections of the Mineralogical Museum, University of Wrocław, Cybulskiego 30, 50-205 Wrocław, Poland, catalogue number MMWr IV7674

How to cite: Pieczka, A., Hawthorne, F.C., Ball, N., Abdu, Y. and Gołębiowska, B. (2017) Graftonite-(Ca), IMA 2017-048. CNMNC Newsletter No. 39, October 2017, page 1281; Mineralogical Magazine, 81, 1279–1286.

IMA No. 2017-049

Zoharite

(Ba,K)6(Fe,Cu,Ni)25S27

Halamish outcrops, Hatrurim Complex, Negev Desert, near Arad, Israel (31°9′42″N, 35°17′29″E)

Irina O. Galuskina*, Biljana Krüger, Evgeny V. Galuskin, Hannes Krüger, Yevgeny Vapnik, Mikhail Murashko, Atali A. Agakhanov, Anuschka Pauluhn and Vincent Olieric

*E-mail: irina.galuskina@us.edu.pl

Djerfisheritegroup

Cubic: Pmforumlam; structure determined

a = 10.3137(1) Å

3.441(25), 3.264(64), 3.112(45), 2.980(80), 2.368(66), 1.986(21), 1.825(100), 1.770(17)

Type material is deposited in the collections of Fersman Mineralogical Museum, Leninskiy pr., 18/k2, 115162 Moscow, Russia, catalogue number 4959/1

How to cite: Galuskina, I.O., Krüger, B., Galuskin, E.V., Krüger, H., Vapnik, Y., Murashko, M., Agakhanov, A.A., Pauluhn, A. and Olieric, V. (2017) Zoharite, IMA 2017-049. CNMNC Newsletter No. 39, October 2017, page 1281; Mineralogical Magazine, 81, 1279–1286.

IMA No. 2017-050

Graftonite-(Mn)

Mnforumla(PO4)2

Upper Lutomia, in the Fore-Sudetic part of the Góry Sowie Block, ∼60  km SW of Wrocław, Poland

Frank C. Hawthorne*, Adam Pieczka, Bożena Gołębiowska, Adam Włodek and Jan Żukrowski

*E-mail: frank_hawthorne@umanitoba.ca

Graftonite group

Monoclinic: P21/c; structure determined

a = 8.811(2), b = 11.494(2), c = 6.138(1) Å, β =99.23(3)°

3.506(73), 3.016(35), 2.953(55), 2.916(53), 2.899(44), 2.874(100), 2.858(79), 2.717(56)

Type material is deposited in the collections of the Mineralogical Museum, University of Wrocław, Cybulskiego 30, 50-205 Wrocław, Poland, catalogue number MMWr IV7927

How to cite: Hawthorne, F.C., Pieczka, A., Gołębiowska, B., Włodek, A. and Żukrowski, J. (2017) Graftonite-(Mn), IMA 2017-050. CNMNC Newsletter No. 39, October 2017, page 1282; Mineralogical Magazine, 81, 1279–1286.

IMA No. 2017-052

Finchite

Sr(UO2)2(V2O8)·5H2O

On the eastern edge of Sulfur Springs Draw, 21 miles S-SE of Lamesa, Martin Co., Texas, USA (32.44203N, 101.87003W)

Tyler Spano, Travis A. Olds*, Susan M. Hall, Anthony R. Kampf, Heather Lowers and Peter C. Burns

*E-mail: tolds@nd.edu

The Sr analogue of francevillite

Orthorhombic: Pbcn; structure determined

a = 8.498(5), b = 10.363(6), c = 16.250(9) Å

8.13(75), 4.25(64), 4.06(100), 3.20(45), 2.98(68), 2.94(47), 2.11(48), 2.03(55)

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 66476 and 66477

How to cite: Spano, T., Olds, T.A., Hall, S.M., Kampf, A.R., Lowers, H. and Burns, P.C. (2017) Finchite, IMA 2017-052. CNMNC Newsletter No. 39, October 2017, page 1282; Mineralogical Magazine, 81, 1279–1286.

IMA No. 2017-054

Baumoite

BaU3Mo2O16(H2O)6

4  km NW of the Radium Hill mine, South Australia, Australia (140°35′44″E, 32°19′20″S)

Peter Elliott,* Jakub Plášil, Václav Petríček, Jiří Čejka and Luca Bindi

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

New structure type

Monoclinic: X2/m(α0γ)0 s with X = (0,½,0,½); structure determined

a = 9.884(1), b = 7.5406(2), c = 14.228(1) Å, β = 109.04(1)°

9.175(39), 7.450(100), 3.554(20), 3.365(31), 3.255(31), 3.209(28), 3.067(33), 2.977(20)

Cotype material is deposited in mineralogical collections of the South Australian Museum, North Terrace, Adelaide, South Australia, Australia, registration number G34697

How to cite: Elliott, P., Plášil, J., Petríček, V., Čejka, J. and Bindi, L. (2017) Baumoite, IMA 2017-054. CNMNC Newsletter No. 39, October 2017, page 1282; Mineralogical Magazine, 81, 1279–1286.

IMA No. 2016-054a

Rüdlingerite

forumlaV5+As5+O7·2H2O

Fianel mine, Val Ferrera, Grisons, Switzerland (46°21′54″N, 8°13′15″E) (holotype); Valletta mine, Canosio, Piedmont, Italy (44°23′42″N, 7°5′42″E) (cotype)

Nicolas Meisser*, Philippe Roth, Fabrizio Nestola, Radek Škoda, Fernando Cámara, Ferdinando Bosi, Marco E. Ciriotti, Ulf Hålenius, Cédric Schnyder and Roberto Bracco

*E-mail: nicolas.meisser@unil.ch

The As analogue of fianelite

Monoclinic: P21/n; structure determined

a = 7.8289(2), b = 14.5673(4), c = 6.7011(2) Å, β = 93.773(2)°

7.28(50), 6.88(40), 5.34(80), 3.048(100), 2.730(60), 2.452(40), 2.344(50), 2.206(60)

Type material is deposited in the mineralogical collections of the Musée Cantonal de Géologie, University of Lausanne, Antropole-Dorigny, CH-1015 Lausanne, Switzerland, catalogue number MGL 080116 (holotype), and the Museo Regionale di Scienze Naturali, Sezione di Mineralogia, Petrografia e Geologia, via Giovanni Giolitti 36, I-10123 Torino, Italy, catalogue number M/U 17121 (cotype)

How to cite: Meisser, N., Roth, P., Nestola, F., Škoda, R., Cámara, F., Bosi, F., Ciriotti, M.E., Hålenius, U., Schnyder, C. and Bracco, R. (2017) Rüdlingerite, IMA 2016-054a. CNMNC Newsletter No. 39, October 2017, page 1282; Mineralogical Magazine, 81, 1279–1286.

IMA No. 2016-071a

Brandãoite

BeAl2(PO4)2(OH)2(H2O)5

“João Firmino mine”, Pomarolli farm region, Divino das Laranjeiras Co., Minas Gerais, Brazil (18°40′25″S, 41°29′27.5″W)

Luis Menezes, Mario Luiz de Sá Carneiro Chaves, Mark A. Cooper, Neil Ball, Yassir Abdu, Ryan Sharp, Frank C. Hawthorne* and Maxwell Day

*E-mail: frank_hawthorne@umanitoba.ca

New structure type

Triclinic: Pforumla; structure determined

a = 6.100(4), b = 8.616(4), c = 10.261(5) Å, α = 93.19(1), β = 95.12(1), γ = 96.86(1)°

6.772(82), 5.243(85), 4.982(73), 4.268(100), 3.846(48), 3.091(53), 2.789(68), 2.712(76)

Type material is deposited in the mineralogical collections of the Department of Natural History, Royal Ontario Museum, 100 Queens Park, Toronto, Ontario M5S 2C6, Canada, catalogue number M57443

How to cite: Menezes, L., Chaves, M.L.S.C., Cooper, M.A., Ball, N., Abdu, Y., Sharp, R., Hawthorne, F.C. and Day, M. (2017) Brandãoite, IMA 2016-071a. CNMNC Newsletter No. 39, October 2017, page 1283; Mineralogical Magazine, 81, 1279–1286.

NEW MINERAL PROPOSALS APPROVED IN SEPEMBER 2017

IMA No. 2017-027

Hongheite

Ca19Fe2+Al4(Fe3+,Mg,Al)8(□,B)4BSi18O69(O,OH)9

Bai Shanchong granite, Malage skarn deposit, NE border of the Gejiu Tin Polymetallic Ore-Field, Yunnan Province, China (23°22′12″N, 103°15′44″E)

Jinsha Xu*, Guowu Li, Guang Fan, Xiangkun Ge, Xiangping Zhu and Ganfu Shen

*E-mail: xujinsha117@aliyun.com

Vesuvianite group

Tetragonal: P4/nnc; structure determined

a = 15.667(1), c = 11.725(2) Å

5.850(15), 3.504(23), 3.072(15), 2.929(47), 2.766(100), 2.608(68), 2.589(27), 2.480(29)

Type material is deposited in the mineralogical collections of the Geological Museum of China, Beijing, China, catalogue number M13579

How to cite: Xu, J., Li, G., Fan, G., Ge, X., Zhu, X. and Shen, G. (2017) Hongheite, IMA 2017-027. CNMNC Newsletter No. 39, October 2017, page 1283; Mineralogical Magazine, 81, 1279–1286.

IMA No. 2017-051

Beusite-(Ca)

Caforumla(PO4)2

Archean Yellowknife pegmatite field, between Upper Ross Lake and Redout Lake, 75  km NE of Yellowknife and 3.5  km E of the Redout Granite, Northwest Territories, Canada (62°44′37″N, 113°6′26″W)

Frank C. Hawthorne*, Neil Ball, Michael A. Wise, Adam Pieczka and Adam Włodek

*E-mail: frank_hawthorne@umanitoba.ca

Graftonite group

Monoclinic: P21/c; structure determined

a = 8.799(2), b = 11.724(2), c = 6.170(1) Å, β = 99.23(3)°

3.564(97), 3.030(58), 2.991(76), 2.932(87), 2.904(100), 2.873(86), 2.718(86), 1.937(47)

Type material is deposited in the collections of the Department of Mineral Sciences, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, USA, catalogue number 177054

How to cite: Hawthorne, F.C., Ball, N., Wise, M.A., Pieczka, A. and Włodek, A. (2017) Beusite-(Ca), IMA 2017-051. CNMNC Newsletter No. 39, October 2017, page 1283; Mineralogical Magazine, 81, 1279–1286.

IMA No. 2017-058

Wildenauerite

Zn(Fe3+,Mn2+)2MnFe3+(PO4)3(OH)3(H2O)6·2H2O

Cornelia Mine Open Cut, 60 to 67 metre level, Hagendorf-Süd pegmatite, Hagendorf, Oberpfalz, Bavaria, Germany (49°39′1″N, 12°27′35″E)

Ian E. Grey*, Erich Keck, Anthony R. Kampf, Colin M. MacRae, John D. Cashion, A. Matt Glen, Cameron J. Davidson and Yesim Gozukara

*E-mail: ian.grey@csiro.au

Related to schmidite and wilhelmgümbelite

Orthorhombic: Pmab; structure determined

a = 11.044(1), b = 25.431(1), c = 6.412(1) Å

12.77(63), 8.368(21), 5.529(15), 5.440(17), 3.760(15), 3.180(22), 2.767(100), 2.718(13)

Type material is deposited in the mineralogical collections of the Museum Victoria, Carlton, Victoria 3053, Australia, registration number M53979

How to cite: Grey, I.E., Keck, E., Kampf, A.R., MacRae, C.M., Cashion, J.D., Glen, A.M., Davidson, C.J. and Gozukara, Y. (2017) Wildenauerite, IMA 2017-058. CNMNC Newsletter No. 39, October 2017, page 1284; Mineralogical Magazine, 81, 1279–1286.

IMA No. 2017-059

Magnesio-hornblende

□Ca2(Mg4Al)(Si7Al)O22(OH)2

Sand dunes of Lüderitz, Karas Region, Namibia (26°38′52″S, 15°09′28″E)

Roberta Oberti*, Massimo Boiocchi, Frank C. Hawthorne and Marco E. Ciriotti

*E-mail: oberti@crystal.unipv.it

Amphibole supergroup

Monoclinic: C2/m; structure determined

a = 9.8308(7), b = 18.0659(11), c = 5.2968(4) Å, β = 104.771(6)°

8.412(74), 3.386(48), 3.121(72), 2.709(100), 2.596(45), 2.541(57), 2.338(41), 2.164(39)

Type material is deposited in the collections of the Museo di Mineralogia, Sistema Museale di Ateneo, University of Pavia, Italy, catalogue number 2017-01

How to cite: Oberti, R., Boiocchi, M., Hawthorne, F.C. and Ciriotti, M.E. (2017) Magnesio-hornblende, IMA 2017-059. CNMNC Newsletter No. 39, October 2017, page 1284; Mineralogical Magazine, 81, 1279–1286.

IMA No. 2017-060

Novograblenovite

(NH4,K)MgCl3·6H2O

Basaltic lava of the 2012–2013 Tolbachik effusive eruption, Plosky Tolbachik volcano, Kamchatka Peninsula, Far-Eastern Region, Russia (55°45′28.8″N, 160°18′39.3″E)

Viktor M. Okrugin, Sharapat S. Kudaeva, Oxana V. Karimova*, Olga V. Yakubovich, Dmitry I. Belakovskiy, Nikita V. Chukanov, Andrey A. Zolotarev, Vlad V. Gurzhiy, Nina G. Zinovieva, Andrew А. Shiryaev and Pavel M. Kartashov

*E-mail: oxana.karimova@gmail.com

Chemically and structurally related to carnallite

Monoclinic: C2/c; structure determined

a = 9.273(6), b = 9.517(7), c = 13.248(8) Å, β = 90.16(1)°

3.883(22), 3.825(26), 3.330(100), 2.976(45), 2.353(29), 2.254(18), 2.024(17), 1.997(25)

Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia, registration number 5003/1

How to cite: Okrugin, V.M., Kudaeva, S.S., Karimova, O.V., Yakubovich, O.V., Belakovskiy, D.I., Chukanov, N.V., Zolotarev, A.A., Gurzhiy, V.V., Zinovieva, N.G., Shiryaev, A.A. and Kartashov, P.M. (2017) Novograblenovite, IMA 2017-060. CNMNC Newsletter No. 39, October 2017, page 1284; Mineralogical Magazine, 81, 1279–1286.

IMA No. 2017-061

Tredouxite

NiSb2O6

Bon Accord deposit, Barberton greenstone belt, SE of the town of Nelspruit, South Africa (25°40′59″S, 31°10′0″E)

Luca Bindi*, Federica Zaccarini, Duncan E. Miller and Giorgio Garuti

*E-mail: luca.bindi@unifi.it

The Ni analogue of byströmite

Tetragonal: P42/mnm; structure determined

a = 4.6342(5), c = 9.2154(8) Å

4.14(10), 3.28(100), 2.561(65), 2.316(20), 1.716(60), 1.639(10), 1.467(10), 1.379(20)

Type material is deposited in the mineralogical collections of the Museo di Storia Naturale, University of Florence, Florence, Italy, catalogue number 3281/I

How to cite: Bindi, L., Zaccarini, F., Miller, D.E. and Garuti, G. (2017) Tredouxite, IMA 2017-061. CNMNC Newsletter No. 39, October 2017, page 1284; Mineralogical Magazine, 81, 1279–1286.

IMA No. 2017-062

Stöfflerite

CaAl2Si2O8

NWA 856 Martian meteorite, fall in Morocco

Oliver Tschauner* and Chi Ma

*E-mail: olivert@physics.unlv.edu

A polymorph of anorthite

Tetragonal: I4/m; structure determined

a = 9.255(1), c = 2.745(3) Å

6.54(31), 4.63(42), 2.93(80), 2.05(100), 1.74(32), 1.54(37), 1.46(41), 1.28(44)

Type material is deposited in the E. Stolper's Martian Meteorite Collection, Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA, thin section of NWA 856

How to cite: Tschauner, O. and Ma, C. (2017) Stöfflerite, IMA 2017-062. CNMNC Newsletter No. 39, October 2017, page 1285; Mineralogical Magazine, 81, 1279–1286.

IMA No. 2017-063

Magnesioleydetite

Mg(UO2)(SO4)2·11H2O

Markey mine, Red Canyon, White Canyon District, San Juan Co., Utah, USA (37°32′57″N, 110°18′08″W)

Anthony R. Kampf*, Jakub Plášil, Anatoly V. Kasatkin and Joe Marty

*E-mail: akampf@nhm.org

The Mg analogue of leydetite

Monoclinic: C2/c; structure determined

a = 11.3513(3), b = 7.7310(2), c = 21.7957(15) Å, β = 102.387(7)°

10.66(100), 6.31(78), 5.85(38), 5.32(49), 5.06(61), 3.759(36), 3.390(59), 3.193(50)

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 66647, 66648, 66649 and 66650

How to cite: Kampf, A.R., Plášil, J., Kasatkin, A.V. and Marty, J. (2017) Magnesioleydetite, IMA 2017-063. CNMNC Newsletter No. 39, October 2017, page 1285; Mineralogical Magazine, 81, 1279–1286.

IMA No. 2017-030a

Hydroxykenopyrochlore

(□,Ce,Ba)2(Nb,Ti)2O6(OH,F)

Compania Brasileira de Metalurgia e Mineração (CBMM), Araxá, Minas Gerais, Brazil (19°38′S, 46°56′W)

Ritsuro Miyawaki, Koichi Momma, Satoshi Matsubara, Takashi Sano, Masako Shigeoka and Hiroyuki Horiuchi

*E-mail: miyawaki@kahaku.go.jp

Pyrochlore supergroup

Cubic: Fdforumlam; structure determined

a = 10.590(5) Å

6.02(22), 3.15(14), 3.02(100), 2.61(29), 1.847(45), 1.576(32), 1.199(9), 1.168(8)

Type material is deposited in the mineralogical collections of the National Museum of Nature and Science, Tsukuba, Japan, registration number NSM-MF16011

How to cite: Miyawaki, R., Momma, K., Matsubara, S., Sano, T., Shigeoka, M. and Horiuchi, H. (2017) Hydroxykenopyrochlore, IMA 2017-030a. CNMNC Newsletter No. 39, October 2017, page 1285; Mineralogical Magazine, 81, 1279–1286.

NOMENCLATURE PROPOSALS APPROVED IN AUGUST 2017

Ericssonite group

The ericssonite group has been established. It includes two minerals: ericssonite, BaforumlaFe3+(Si2O7)O(OH), and ferroericssonite, BaforumlaFe3+(Si2O7)O(OH).

NOMENCLATURE PROPOSAL APPROVED IN SEPTEMBER 2017

IMA 17-C: Redefinition of cesbronite

Proposal 17-C is accepted, and the formula of cesbronite, based on single-crystal X-ray diffraction study, is redefined as forumlaTe6+O4(OH)4. Tellurium occurs as Te6+ and not Te4+.

IMA 17-D: Redefinition of zircophyllite

Proposal 17-D is accepted, and zircophyllite is redefined as an astrophyllite-group mineral, ideally K2NaforumlaZr2(Si4O12)2O2(OH)4F (Fe2+-dominant at C7). In accord with proposal IMA 15-B, zircophyllite was considered as a kupletskite-group mineral within the astrophyllite supergroup (Mn2+-dominant at C7), with ideal formula K2NaforumlaZr2(Si4O12)2O2(OH)4F. This formula was not in accord with the one reported in the original description of zircophyllite.

REVISED CHEMICAL FORMULAE

A paper on the mineral hemihedrite has been recently published [Mineralogical Magazine, 81 (2017), 1021–1030] in which the ideal chemical formula of the mineral is given as ZnPb10(CrO4)6(SiO4)2(OH)2, with hydroxyl in the place of fluorine. These data were examined carefully by the CNMNC officers and were considered reliable. Accordingly it was agreed to modify the formula of hemihedrite in the official IMA List of Minerals.

ERRATUM

After the approval of the new mineral magnesiobeltrandoite-2N3S (IMA 2016-073; see CNMNC Newsletter 34) the authors became aware that the approved chemical formula of the mineral was not charge-balanced. The correct formula is (Mg6Al2)(Al18forumla)O38(OH)2.