New minerals and nomenclature modifications approved in 2017

IMA No. 2016-095

• Shinkolobweite

• Pb_1.25[U⁵⁺(H₂O)₂(U⁶⁺O₂)₅O₈(OH)₂](H₂O)₅

• Shinkolobwe mine, Katanga, Democratic Republic of Congo (11°2′54″S, 26°33′2″E)

• Travis A. Olds^*, Aaron J. Lussier, Allen G. Oliver, Václav Petříček, Jakub Plášil, Anthony R. Kampf, Peter C. Burns, Mateusz Dembowski, Shawn M. Carlson and Ian M. Steele

• *E-mail: tolds@nd.edu

• New structure type

• Orthorhombic: superspace group Imm2(00g)(000); structure determined

• a = 11.9454(9), b = 14.309(1), c = 7.063(2) Å, q₁ = 0.3279·c^*

• 7.27(27), 3.614(15), 3.486(49), 3.149(100), 2.519(15), 2.031(15), 1.993(23), 1.771(16)

• Type material is deposited in the mineralogical collections of the Canadian Museum of Nature, Ottawa, Canada, catalogue number CMNMC 86897, and the Natural History Museum of Los Angeles County, Los Angeles, USA, catalogue number 65618 How to cite: Olds, T.A., Lussier, A.J., Oliver, A.G., Petříček, V., Plášil, J., Kampf, A.R., Burns, P.C., Dembowski, M., Carlson, S.M. and Steele, I.M. (2017) Shinkolobweite, IMA 2016-095. CNMNC Newsletter No. 36, April 2017, page 339; European Journal of Mineralogy, 29, 339–344.

IMA No. 2016-096

• Tiberiobardiite

• {Cu₉Al[SiO₃(OH)]₂(OH)₁₂(H₂O)₆}(SO₄)_1.5·10H₂O

• Cretaio, near Prata, Massa Marittima (GR), Tuscany, Italy (43°03′10″N, 10°58′40″E)

• Cristian Biagioni^*, Marco Pasero and Federica Zaccarini

• *E-mail: biagioni@dst.unipi.it

• The Si analogue of chalcophyllite

• Trigonal: $R3¯$⁠; structure determined

• a = 10.6860(4), c = 28.324(1) Å

• 9.4(s), 4.67(s), 2.68(w), 2.576(m), 2.330(m), 2.041 (mw), 1.548(w), 1.528(w)

• Type material is deposited in the mineralogical collections of the Museo di Storia Naturale, Università di Pisa, Via Roma 79, Calci (PI), Italy, catalogue number 19900

• How to cite: Biagioni, C., Pasero, M. and Zaccarini, F. (2017) Tiberiobardiite, IMA 2016-096. CNMNC Newsletter No. 36, April 2017, page 340; European Journal of Mineralogy, 29, 339–344.

IMA No. 2016-097

• Hyršlite

• Pb₈As₁₀Sb₆S₃₂

• Uchucchacua deposit, Oyon district, Catajambo, Lima

• Department, Peru (10°37′23″S, 76°41′17″W)

• Frank N. Keutsch^*, Dan Topa and Emil Makovicky

• *E-mail: keutsch@seas.harvard.edu

• Sartorite homologous series

• Monoclinic: P2₁; structure determined

• a = 8.475(3), b = 7.917(3), c = 20.039(8) Å, β = 102.070(6)°

• 3.880(59), 3.512(100), 3.493(46), 3.488(47), 2.974(45), 2.968(47), 2,776(71), 2.773(70)

• Type material is deposited in the mineralogical collections of the Naturhistorisches Museum Wien, Austria, catalogue number O201

• How to cite: Keutsch, F.N., Topa, D. and Makovicky, E. (2017) Hyršlite, IMA 2016-097. CNMNC Newsletter No. 36, April 2017, page 340; European Journal of Mineralogy, 29, 339–344.

IMA No. 2016-098

• Stracherite

• BaCa₆(SiO₄)₂[(PO₄)(CO₃)]₂F

• Hatrurim Complex, Negev Desert, near Arad city, Israel (31°13′58″N, 35°16′2″E)

• Evgeny V. Galuskin^*, Biljana Krüger, Irina O. Galuskina, Hannes Krüger, Yevgeny Vapnik, Anuschka Pauluhn and Vincent Olieric

• *E-mail: evgeny.galuskin@us.edu.pl

• Isostructural with zadovite and aradite

• Trigonal: $R3¯m$⁠; structure determined

• a = 7.0877(5), c = 25.201(2) Å

• 3.544(66), 3.265(39), 3.105(43), 3.047(82), 2.800(42), 2.709(100), 1.948(36), 1.772(54)

• Type material is deposited in the collections of the Fersman Mineralogical Museum, Leninskiy pr., 18/κ2, 115162 Moscow, Russia, catalogue numbers 4957/1 How to cite: Galuskin, E.V., Krüger, B., Galuskina, I. O., Krüger, H., Vapnik, Y., Pauluhn, A. and Olieric, V. (2017) Stracherite, IMA 2016-098. CNMNC Newsletter No. 36, April 2017, page 340; European Journal of Mineralogy, 29, 339–344.

IMA No. 2016-099

• Arsenmedaite

• $Mn62+As5+Si5O18(OH)$

• Molinello, Graveglia Valley, Ne, Genova, Liguria, Italy (44°20′43″N, 9°27′32″E)

• Cristian Biagioni*, Donato Belmonte, Cristina Carbone, Roberto Cabella, Federica Zaccarini and Corrado Balestra

• *E-mail: cristian.biagioni@unipi.it

• The As analogue of medaite

• Monoclinic: P2₁/n; structure determined

• a = 6.7099(3), b = 29.001(1), c = 7.5668(3) Å, β = 95.469(3)°

• 4.777(58), 3.266(100), 3.159(72), 3.094(82), 2.963(83), 2.935(79), 2.788(68), 2.612(98)

• Type material is deposited in the mineralogical collections of the Museo di Storia Naturale, Università di Pisa, Via Roma 79, Calci (Pisa), Italy, catalogue number 19901, and the Dipartimento di Scienze della Terra, dell’Ambiente e della Vita (DISTAV), Università di Genova, Corso Europa 26, Genova, Italy, catalogue number MO483

• How to cite: Biagioni, C., Belmonte, D., Carbone, C., Cabella, R., Zaccarini, F. and Balestra, C. (2017) Arsenmedaite, IMA 2016-099. CNMNC Newsletter No. 36, April 2017, page 340; European Journal of Mineralogy, 29, 339–344.

IMA No. 2016-100

• Ariegilatite

• BaCa₁₂(SiO₄)₄(PO₄)₂F₂O

• Hatrurim Complex, Negev Desert, near Arad city, Israel (31°13′58″N, 35°16′2″E)

• Evgeny V. Galuskin^*, Biljana Krüger, Irina O. Galuskina, Hannes Krüger, Yevgeny Vapnik, Justyna A. Wojdyla and Mikhail Murashko

• *E-mail: evgeny.galuskin@us.edu.pl

• The P analogue of dargaite

• Trigonal: $R3¯m$⁠; structure determined

• a = 7.1551(6), c = 41.303(3) Å

• 3.578(51), 3.437(45), 3.090(100), 2.822(82), 2.754(62), 2.743(51), 1.983(47), 1.789(92)

• Type material is deposited in the collections of the Fersman Mineralogical Museum, Leninskiy pr., 18/κ2, 115162 Moscow, Russia, catalogue numbers 4956/1 How to cite: Galuskin, E.V., Krüger, B., Galuskina, I. O., Krüger, H., Vapnik, Y., Wojdyla, J.A. and Murashko, M. (2017) Ariegilatite, IMA 2016-100. CNMNC Newsletter No. 36, April 2017, page 340; European Journal of Mineralogy, 29, 339–344.

IMA No. 2016-101

• Staročeskéite

• Ag_0.70Pb_1.60(Bi_1.35Sb_1.35)_Σ2.70S₆

• Staročeské Lode, Kutná Hora district, Central Bohemia, Czech Republic (49°58.47882′N, 15°16.15142′E)

• Richard Pažout^* and Jiří Sejkora

• *E-mail: richard.pazout@vscht.cz

• Lilianite group

• Orthorhombic: Cmcm; structure determined

• a = 4.2539(8), b = 13.3094(8), c = 19.625(1) Å

• 3.746(33), 3.446(61), 3.382(100), 3.035(45), 2.932(80), 2.779(34), 2.127(29), 2.098(28)

• Type material is deposited in the collections of the National Museum, Department of Mineralogy and Petrology, Cirkusová 1740, Praha 9, Czech Republic, catalogue number P1P 30/2016

• How to cite: Pažout, R. and Sejkora, J. (2017) Staročeskéite, IMA 2016-101. CNMNC Newsletter No. 36, April 2017, page 341; European Journal of Mineralogy, 29, 339–344.

IMA No. 2016-102

• Giftgrubeite

• CaMn₂Ca₂(AsO₄)₂(AsO₃OH)₂·4H₂O

• Giftgrube mine, St Jacques vein, Rauenthal, Sainte Marie-aux-Mines, Haut-Rhin, France

• Nicolas Meisser*, Jakub Plášil, Thierry Brunsperger, Cédric Lheur and Radek Škoda

• *E-mail: nicolas.meisser@unil.ch

• Hureaulite group

• Monoclinic: C2/c; structure determined

• a = 18.495(7), b = 9.475(4), c = 9.986(4) Å, β = 96.79(3)° 8.54(40), 4.80(50), 4.65(50), 3.33(100), 3.18(80), 3.05(50), 2.488(50), 2.414(60)

• Type material is deposited in the mineralogical collections of the Musée Cantonal de Géologie, University of Lausanne, Anthropole, Dorigny, CH-1015 Lausanne, Switzerland, catalogue number MGL 080133 (holotype) and 080134 (cotype)

• How to cite: Meisser, N., Plášil, J., Brunsperger, T., Lheur, C. and Škoda, R. (2017) Giftgrubeite, IMA 2016-102. CNMNC Newsletter No. 36, April 2017, page 341; European Journal of Mineralogy, 29, 339–344.

IMA No. 2016-103

• Pansnerite

• K₃Na₃(Fe³⁺,Al)₆(AsO₄)₈

• 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 asl)

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

• *E-mail: igorpekov@mail.ru

• Closely related to ozerovaite

• Orthorhombic: Cmce; structure determined

• a = 10.7372(3), b = 20.837(1), c = 6.4734(2) Å

• 10.49(100), 5.380(88), 4.793(65), 3.105(46), 3.079(32), 2.932(35), 2.783(65), 2.694(52)

• Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia, catalogue numbers 4964/1 How to cite: Pekov, I.V., Zubkova, N.V., Koshlyakova, N.N., Belakovskiy, D.I., Vigasina, M.F., Yapaskurt, V. O., Agakhanov, A.A., Britvin, S.N., Turchkova, A.G., Sidorov, E.G. and Pushcharovsky, D.Y. (2017) Pansnerite, IMA 2016-103. CNMNC Newsletter No. 36, April 2017, page 341; European Journal of Mineralogy, 29, 339–344.

IMA No. 2016-104

• Cesiokenopyrochlore ☐Nb₂(O,OH)₆Cs_1-x (x ~ 0.20)

• Tetezantsio pegmatites, Tetezantsio-Andoabatokely Pegmatite Field, Betafo District, Antananarivo Province, Madagascar (20°9′S, 46°39′E)

• Atali A. Agakhanov*, Anatoly V. Kasatkin, Sergey N. Britvin, Oleg I. Siidra, Leonid A. Pautov, Igor V. Pekov and Vladimir Y. Karpenko

• *E-mail: atali99@mail.ru

• Pyrochlore supergroup

• Cubic: $Fd3¯m$⁠; structure determined

• a = 10.444(1) Å

• 6.03(37), 3.70(9), 3.15(100), 3.02(35), 2.012(17), 1.848(19), 1.576(11), 1.361(9)

• Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia, catalogue numbers 4954/1 How to cite: Agakhanov, A.A., Kasatkin, A.V., Britvin, S.N., Siidra, O.I., Pautov, L.A., Pekov, I.V. and Karpenko, V.Y. (2017) Cesiokenopyrochlore, IMA 2016-104. CNMNC Newsletter No. 36, April 2017, page 341; European Journal of Mineralogy, 29, 339–344.

IMA No. 2016-105

• Vymazalováite

• Pd₃Bi₂S₂

• Komsomolsky mine, Talnakh deposit, Norilsk region, Russia (69°30′20″N, 88°27′17″E)

• Sergei F. Sluzhenikin, Vladimir V. Kozlov, Christopher J. Stanley* and Maria V. Lukashova

• *E-mail: C.Stanley@nhm.ac.uk

• Known synthetic analogue

• Cubic: I2₁3

• a = 8.3097(9) Å

• 4.147(32), 2.934(78), 2.396(100), 2.076(53), 1.857(27), 1.695(34), 1.468(35), 1.252(31)

• Type material is deposited in the collections of the Natural History Museum, London, UK, polished section BM 2016,150

• How to cite: Sluzhenikin, S.F., Kozlov, V.V., Stanley, C.J. and Lukashova, M.V. (2017) Vymazalováite, IMA 2016-105. CNMNC Newsletter No. 36, April 2017, page 342; European Journal of Mineralogy, 29, 339–344.

IMA No. 2016-106

• Lagalyite

• Ca_2xMn_1-xO₂·1.5-2H₂O (x = 0.05–0.08)

• Christbescherung mine, Großvoigtsberg, near Freiberg, Saxony, Germany; Aufgeklärt Glück mine, Hasserode, Harz, Saxony-Anhalt, Germany

• Thomas Witzke^*, Herbert Pöllmann, José Eduardo F. C. Gardolinski and Marco Sommariva

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

• Known synthetic analogue

• Monoclinic: s.g. unknown (possibly C2)

• a = 5.146(9), b = 2.81(1), c = 9.98(2) Å, β = 94.2(2)° 9.94(100), 4.975(57), 3.320(20), 2.476(4), 2.360(2), 1.468(3), 1.454(3), 1.420(3)

• Type material is deposited in the mineralogical collections of the Bergakademie Freiberg, Germany, catalogue No. 84104 (Christbescherung Mine, Großvoigtsberg) and No. 84105 (Aufgeklärt Glück Mine, Hasserode)

• How to cite: Witzke, T., Pöllmann, H., Gardolinski, J. E.F.C. and Sommariva, M. (2017) Lagalyite, IMA 2016-106. CNMNC Newsletter No. 36, April 2017, page 342; European Journal of Mineralogy, 29, 339–344.

IMA No. 2016-107

• Ulfanderssonite-(Ce)

• (Ce₁₅Ca)_Σ16Mg₂(SiO₄)₁₀(SiO₃OH)(OH,F)₅Cl₃

• Malmkärra mine, Norberg, Västmanland, Sweden (60°3′34″N, 15°50′45″E, 200 m asl)

• Dan Holtstam*, Luca Bindi, Ulf Hålenius and Uwe Kolitsch

• *E-mail: dan.holtstam@vr.se

• New structure type

• Monoclinic: Cm; structure determined

• a = 14.1403(8), b = 10.7430(7), c = 15.498(1) Å, β = 106.615(6)°

• 4.350(21), 3.644(21), 3.524(26), 2.948(100), 2.923(47), 2.683(24), 2.660(32), 1.760(25)

• 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 NRM 20010323

• How to cite: Holtstam, D., Bindi, L., Hålenius, U. and Kolitsch, U. (2017) Ulfanderssonite-(Ce), IMA 2016-107. CNMNC Newsletter No. 36, April 2017, page 342; European Journal of Mineralogy, 29, 339–344.

IMA No. 2016-108

• Heyerdahlite

• Na₃Mn₇Ti₂(Si₄O₁₂)₂O₂(OH)₄F(H₂O)₂

• Bratthagen pegmatite, Larvik Plutonic complex, Lågendalen, Hedrum, Vestfold County, Norway (59°09′26″N, 10°00′39″E)

• Elena Sokolova^*, Maxwell C. Day, Frank C. Hawthorne and Roy Kristiansen

• *E-mail: elena_sokolova@umanitoba.ca

• Astrophyllite supergroup

• Triclinic: $P1¯$⁠; structure determined

• a = 5.392(2), b = 11.968(4), c = 11.868(4) Å, α = 112.743(8), β = 94.816(7), γ = 103.037(8)°

• 10.745(81), 3.582(66), 2.791(65), 2.686(45), 2.663(65), 2.594(100), 2.496(51), 1.582(45)

• Type material is deposited in the mineralogical collections of the Royal Ontario Museum, Toronto, Ontario, Canada, accession number M57516

• How to cite: Sokolova, E., Day, M.C., Hawthorne, F.C. and Kristiansen, R. (2017) Heyerdahlite, IMA 2016-108. CNMNC Newsletter No. 36, April 2017, page 342; European Journal of Mineralogy, 29, 339–344.

IMA No. 2016-109

• Plumbopharmacosiderite

• $Pb0.5Fe43+(AsO4)3(OH)4⋅5H2O$

• In the dumps of Monte Falò mine, near the village of Coiromonte, Armeno (NO), Piedmont, Italy (45°50′52.37″N, 8°29′1.13″E)

• Pietro Vignola^*, Frédéric Hatert, Nicola Rotiroti, Fabrice Dal Bo, Marco Merlini, Andrea Risplendente, Paolo Gentile, Claudio Albertini and Alessandro Pavese

• *E-mail: pietro.vignola@idpa.cnr.it

• Pharmacosiderite group

• Cubic: $P4¯3m$⁠; structure determined

• a = 7.9791(2) Å

• 8.02(100), 5.86(15), 4.56(12), 3.98(18), 3.25(24), 2.830(18), 2.535(12), 1.879(29)

• Type material is deposited in the collections of the Laboratoire de Minéralogie, University of Liège, Belgium, collection number 20392

• How to cite: Vignola, P., Hatert, F., Rotiroti, N., Dal Bo, F., Merlini, M., Risplendente, A., Gentile, P., Albertini, C. and Pavese, A. (2017) Heyerdahlite, IMA 2016-108. CNMNC Newsletter No. 36, April 2017, page 342; European Journal of Mineralogy, 29, 339–344.

IMA No. 2016-110

• Rubinite

• $Ca3Ti23+Si3O12$

• Vigarano meteorite, fell near Vigarano Pieve, Ferrara, Italy (44°51′N, 11°24′E); Allende CV3 meteorite, fell near Pueblito de Allende, Chihuahua, Mexico (26°58′N, 105°19′W)

• Chi Ma^*, Takashi Yoshizaki, Tomoki Nakamura and Jun Muto

• *E-mail: chi@gps.caltech.edu

• Garnet supergroup

• Cubic: $Ia3¯d$

• a = 12.1875 Å

• 3.047(55), 2.725(100), 2.488(50), 1.690(34), 1.629(80), 1.363(18), 1.330(23), 1.113(20)

• Type material is deposited in the meteorite collection of the Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California 91125, USA, section VCM3 (Vigarano), and the Division of Earth and Planetary Materials Science, Graduate School of Science, Tohoku University, Sendai, Miyagi 980-8578, Japan, section AE01 (Allende)

• How to cite: Ma, C., Yoshizaki, T., Nakamura, T. and Muto, J. (2017) Rubinite, IMA 2016-110. CNMNC Newsletter No. 36, April 2017, page 343; European Journal of Mineralogy, 29, 339–344.

IMA No. 2016-111

• Clino-suenoite

• $☐Mn22+Mg5Si8O22(OH)2$

• Vedretta Inferiore di Scerscen (Lower Scerscen Glacier), Lanzada, Valmalenco, Sondrio, Italy (46°16′9″N, 9°54′8″E)

• Roberta Oberti*, Massimo Boiocchi, Frank C. Hawthorne, Marco E. Ciriotti, Olav Revheim and Roberto Bracco

• *E-mail: oberti@crystal.unipv.it

• Amphibole supergroup

• Monoclinic: C2/m; structure determined

• a = 9.613(1), b = 18.073(2), c = 5.3073(6) Å, β = 102.825(2)°

• 8.321(60), 3.421(53), 3.253(41), 3.079(62), 2.728 (100), 2.603(42), 2.513(77), 2.175(41)

• Type material is deposited in the collections of Museo di Mineralogia, Dipartimento di Scienze della Terra e dell’Ambiente, Università di Pavia, catalogue number 2016-01

• How to cite: Oberti, R., Boiocchi, M., Hawthorne, F.C., Ciriotti, M.E., Revheim, O. and Bracco, R. (2017) Clino-suenoite, IMA 2016-111. CNMNC Newsletter No. 36, April 2017, page 343; European Journal of Mineralogy, 29, 339–344.

IMA No. 2016-112

• Verneite

• Na₂Ca₃Al₂F₁₄

• In fumaroles on Eldfell and Hekla volcanoes, Iceland; in a sublimate sample from Vesuvius volcano, Campania, Italy

• Tonči Balić-Zunić^*, Anna Garavelli, Daniela Pinto and Donatella Mitolo

• *E-mail: toncib@ign.ku.dk

• Known synthetic analogue

• Cubic: I2₁3

• a = 10.264(1) Å

• 4.18(76), 3.23(68), 2.95(100), 2.184(78), 2.009(98), 1.871(75), 1.811(84), 1.663(66)

• Type material is deposited in the mineralogical collections of the Icelandic Institute of Natural History, Gardabaer, Iceland, sample numbers NI 15509, NI 15518 and NI 17046 (Hekla – holotype) and NI 12256 (Eldfell – cotype), the Department of Geosciences and Natural Resource Management, University of Copenhagen, Denmark, sample numbers E4-1A, E4-2A and E4-2B (Eldfell – cotype), and the Pelloux collection of the Dipartimento di Scienze della Terra e Geoambientali, Università di Bari, Italy (Vesuvius – cotype)

• How to cite: Balić-Zunić, T., Garavelli, A., Pinto, D. and Mitolo, D. (2017) Verneite, IMA 2016-112. CNMNC Newsletter No. 36, April 2017, page 343; European Journal of Mineralogy, 29, 339–344.

IMA No. 2016-113

• Topsøeite

• FeF₃(H₂O)₃

• In fumaroles on Hekla volcano, Iceland (63°59′37″N, 19°39′48″W)

• Tonči Balić-Zunić*, Anna Garavelli and Donatella Mitolo

• *E-mail: toncib@ign.ku.dk

• The Fe³⁺ analogue of rosenbergite

• Tetragonal: P4/n; structure determined

• a = 7.8384(4), c = 3.8718(2) Å

• 5.52(100), 3.90(74), 3.45(72), 3.16(40), 2.76(45), 2.470(54), 1.874(33), 1.748(45)

• Type material is deposited in the mineralogical collections of the Icelandic Institute of Natural History, Gardabaer, Iceland, sample number NI 15515

• How to cite: Balić-Zunić, T., Garavelli, A. and Mitolo, D. (2017) Topsøeite, IMA 2016-113. CNMNC Newsletter No. 36, April 2017, page 343; European Journal of Mineralogy, 29, 339–344.

IMA No. 2015-022a

• Zagamiite

• CaAl₂Si_3.5O₁₁

• Zagami meteorite, fell at Zagami, Katsina Province, Nigeria; NWA 856 meteorite, fell in Morocco

• Chi Ma^* and Oliver Tschauner

• *E-mail: chi@gps.caltech.edu

• New structure type

• Hexagonal: P6₃/mmc; structure determined

• a = 5.403(2), c = 12.77(3) Å

• 2.701(29), 2.638(49), 2.488(20), 2.197(15), 2.050 (100), 1.575(67), 1.547(22), 1.351(44)

• Type material is deposited in the mineralogical collections of the Smithsonian Institution’s National Museum of Natural History, Washington DC, USA, registration number USNM 7619 (Zagami), and the E. Stolper’s Martian Meteorite Collection of the Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California 91125, USA (NWA 856)

• How to cite: Ma, C. and Tschauner, O. (2017) Zagamiite, IMA 2015-022a. CNMNC Newsletter No. 36, April 2017, page 344; European Journal of Mineralogy, 29, 339–344.

Graftonite group

• The graftonite group has been established. The rootname “graftonite” is adopted for minerals with ^M2,M3Fe²⁺ > ^M2,M3Mn²⁺, the rootname “beusite” for minerals with ^M2,M3Mn²⁺ > ^M2,M3Fe²⁺. Graftonite is redefined as $Fe2+Fe22+(PO4)2$⁠. Beusite is redefined as $Mn2+Mn22+(PO4)2$⁠. Three potential new minerals belonging to the graftonite group are anticipated.

IMA 17-A: Swamboite (redefined and renamed)

• Proposal 17-A is accepted, and swamboite is renamed to swamboite-(Nd). Swamboite was originally described as a new mineral with a formula U_0.333H₂ (UO₂SiO₄)₂·10H₂O. However, new chemical analyses of the type material indicate that swamboite contains REEs, and dominantly Nd³⁺, as an essential constituent. The revised chemical formula of swamboite-(Nd) is Nd_0.333[(UO₂)(SiO₃OH)](H₂O)_~2.5.