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 404; Mineralogical Magazine, 81, 403–409.

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: R⁠; 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 404; Mineralogical Magazine, 81, 403–409.

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 404; Mineralogical Magazine, 81, 403–409.

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: Rm; 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/к2, 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 404; Mineralogical Magazine, 81, 403–409.

IMA No. 2016-099

Arsenmedaite

Mn²⁺₆As⁵⁺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 405; Mineralogical Magazine, 81, 403–409.

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: Rm; 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/к2, 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 405; Mineralogical Magazine, 81, 403–409.

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 405; Mineralogical Magazine, 81, 403–409.

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 405; Mineralogical Magazine, 81, 403–409.

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 406; Mineralogical Magazine, 81, 403–409.

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: Fdm; 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 406; Mineralogical Magazine, 81, 403–409.

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 406; Mineralogical Magazine, 81, 403–409.

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 406; Mineralogical Magazine, 81, 403–409.

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 407; Mineralogical Magazine, 81, 403–409.

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: P⁠; 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 407; Mineralogical Magazine, 81, 403–409.

IMA No. 2016-109

Plumbopharmacosiderite

Pb_0.5Fe³⁺₄(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: P3 m; 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 407; Mineralogical Magazine, 81, 403–409.

IMA No. 2016-110

Rubinite

Ca₃Ti³⁺₂Si₃O₁₂

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: Iad

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 408; Mineralogical Magazine, 81, 403–409.

IMA No. 2016-111

Clino-suenoite

□Mn²⁺₂Mg₅Si₈O₂₂(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 408; Mineralogical Magazine, 81, 403–409.

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-Žunić*, 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-Žunić, T., Garavelli, A., Pinto, D. and Mitolo, D. (2017) Verneite, IMA 2016-112. CNMNC Newsletter No. 36, April 2017, page 408; Mineralogical Magazine, 81, 403–409.

IMA No. 2016-113

Topsøeite

FeF₃(H₂O)₃

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

Tonči Balić-Žunić*, 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-Žunić, T., Garavelli, A. and Mitolo, D. (2017) Topsøeite, IMA 2016-113. CNMNC Newsletter No. 36, April 2017, page 408; Mineralogical Magazine, 81, 403–409.

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 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 409; Mineralogical Magazine, 81, 403–409.

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⁺Fe²⁺₂(PO₄)₂. Beusite is redefined as Mn²⁺Mn²⁺₂(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.