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 APRIL 2018
IMA No. 2017-115
Fiemmeite
Cu2(C2O4)(OH)2·2H2O
Passo di San Lugano, Fiemme Valley, Carano (TN), Italy
Francesco Demartin*, Italo Campostrini, Paolo Ferretti and Ivano Rocchetti
*E-mail: [email protected]
New structure type
Monoclinic: P21/c; structure determined
a = 3.4245(6), b = 10.141(2), c = 19.397(3) Å, β = 90.71(1)°
9.71(55), 7.02(28), 5.079(100), 4.501(50), 3.072(58), 2.891(20), 2.730(15), 2.686(25)
Type material is deposited in the mineralogical collections of MUSE – Museo delle Scienze di Trento, Corso del Lavoro e della Scienza 3, I-38122 Trento, Italy, sample No. 5249
How to cite: Demartin, F., Campostrini, I., Ferretti, P. and Rocchetti, I. (2018) Fiemmeite, IMA 2017-115. CNMNC Newsletter No. 43, June 2018, page 780; Mineralogical Magazine, 82, 779–785.
IMA No. 2017-116
Vaniniite
Ca2Mn2+3Mn3+2O2(AsO4)4·2H2O
Falotta mine, near Rona village, Oberhalbstein valley, Graubünden, Switzerland
Nicolas Meisser*, Remo Widmer, Thomas Armbruster, Radek Škoda, Philippe Roth and Thomas Mumenthaler
*E-mail: [email protected]
New structure type
Monoclinic: P21/c; structure determined
a = 8.9856 (1), b = 8.9472(1), c = 9.9039(1) Å, β = 94.719(1)°
5.47(40), 4.31(40), 3.99(50), 3.76(70), 3.18(40), 2.99(100), 1.646(70), 1.580(50)
Type material is deposited in the mineralogical collections of Musée Cantonal de Géologie, University of Lausanne, Anthropole, Dorigny, CH-1015 Lausanne, Switzerland, catalogue number MGL n° 080143 (holotype) and 080144 (cotype)
How to cite: Meisser, N., Widmer, R., Armbruster, T., Škoda, R., Roth, P. and Mumenthaler, T. (2018) Vaniniite, IMA 2017-116. CNMNC Newsletter No. 43, June 2018, page 780; Mineralogical Magazine, 82, 779–785.
IMA No. 2017-117
Bodieite
Bi3+2(Te4+O3)2(SO4)
On a dump ca. 0.2 km W of the North Star mine, Tintic district, Juab Co., Utah, USA (39.921298°N, 112.108668°W); Pittsburg-Liberty mine, Masonic district, Mono Co., California, USA (38.358637°N, 119.120321°W)
Anthony R. Kampf*, Robert M. Housley, George R. Rossman, Joe Marty and Marek Chorazewicz
*E-mail: [email protected]
New structure type
Monoclinic: I2/a; structure determined
a = 8.1033(8), b = 7.4302(8), c = 14.695(2) Å, β = 97.771(9)°
7.31(20), 3.331(62), 3.243(100), 3.039(20), 2.716(25), 1.960(15), 1.901(21), 1.662(17)
Cotype material is deposited in the mineralogical collections of the Natural History Museum of Los Angeles County, 900 Exposition Blvd, Los Angeles, California, USA, catalogue numbers 67482 (dump near North Star mine), 67483, 67484, 67485 and 67486 (Pittsburg-Liberty mine)
How to cite: Kampf, A.R., Housley, R.M., Rossman, G.R., Marty, J. and Chorazewicz, M. (2018) Bodieite, IMA 2017-117. CNMNC Newsletter No. 43, June 2018, page 780; Mineralogical Magazine, 82, 779–785.
IMA No. 2018-001
Paraberzeliite
NaCa2Mg2(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 asl)
Igor V. Pekov*, Natalia N. Koshlyakova, Dmitry I. Belakovskiy, Marina F. Vigasina, Natalia V. Zubkova, Atali A. Agakhanov, Sergey N. Britvin, Evgeny G. Sidorov and Dmitry Y. Pushcharovsky
*E-mail: [email protected]
Alluaudite group
Monoclinic: C2/c; structure determined
a = 12.3143(7), b = 13.0679(5), c = 6.7717(4) Å, β = 113.657(7)°
3.642(25), 3.606(17), 3.243(29), 3.096(22), 2.986(34), 2.888(22), 2.822(100), 2.658(29)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia, registration number 5067/1
How to cite: Pekov, I.V., Koshlyakova, N.N., Belakovskiy, D.I., Vigasina, M.F., Zubkova, N.V., Agakhanov, A.A., Britvin, S.N., Sidorov, E.G. and Pushcharovsky, D.Y. (2018) Paraberzeliite, IMA 2018-001. CNMNC Newsletter No 43, June 2018, page 780; Mineralogical Magazine, 82, 779–785.
IMA No. 2018-002
Oyonite
Ag3Mn2Pb4Sb7As4S24
Uchucchacua deposit, Oyon district, Catajambo, Lima Department, Peru (10°37′23″S, 76°41′17″W)
Luca Bindi*, Cristian Biagioni and Frank N. Keutsch
*E-mail: [email protected]
Lillianite homeotypic series
Monoclinic: P21/n; structure determined
a = 19.181(2), b = 12.775(1), c = 8.179(1) Å, β = 90.47(1)°
3.34(40), 3.29(100), 3.15(30), 2.920(40), 2.860(30), 2.821(70), 2.678(35), 2.045(50)
Type material is deposited in the mineralogical collections of the Museo di Storia Naturale, Sezione di Mineralogia e Litologia, Università di Firenze, Via La Pira 4, I-50121, Firenze, Italy, catalogue number 3283/I
How to cite: Bindi, L., Biagioni, C. and Keutsch, F.N. (2018) Oyonite, IMA 2018-002. CNMNC Newsletter No 43, June 2018, page 781; Mineralogical Magazine, 82, 779–785.
IMA No. 2017-069a
Belomarinaite
KNa(SO4)
Toludskoe lava field, Fissure Tolbachic eruption 2012–2013, Kamchatka peninsula, Far-Eastern Region, Russia (55°45′1.32″N, 160°19′40.74″E, 1480 m a.s.l.)
Stanislav K. Filatov*, Andrey P. Shablinskii, Lidiya P. Vergasova, Olga Y. Saprikina, Rimma S. Bubnova, Svetlana V. Moskaleva and Alexander B. Belousov
*E-mail: [email protected]
Chemically and structurally related to aphthitalite
Trigonal: P3m1; structure determined
a = 5.604(1), c = 7.178(2) Å
4.022(31), 3.591(26), 2.884(74), 2.800(100), 2.391(16), 2.296(8), 2.008(38), 1.634(10)
Type material is deposited in the collections of the Mineralogical Museum, Saint-Petersburg State University, University Emb. 7/9, St. Petersburg 199034, Russia, catalogue number 1/19678
How to cite: Filatov, S.K., Shablinskii, A.P., Vergasova, L.P., Saprikina, O.Y., Bubnova, R.S., Moskaleva, S.V. and Belousov, A.B. (2018) Belomarinaite, IMA 2017-069a. CNMNC Newsletter No. 43, June 2018, page 781; Mineralogical Magazine, 82, 779–785.
NEW MINERAL PROPOSALS APPROVED IN MAY 2018
IMA No. 2018-003
Uakitite
VN
Iron meteorite Uakit (IIAB, 3.96 kg) found in 2016 in the Baunt Evenk district, Republic of Buryatia, Russia (55°29′47.50″N, 113°33′47.98″E)
Victor V. Sharygin*, German S. Ripp, Grigory A. Yakovlev, Yurii V. Seryotkin, Nikolai S. Karmanov, Ivan A. Izbrodin, Victor I. Grokhovsky and Elena A. Khromova
*E-mail: [email protected]
Known synthetic analogue
Cubic: Fm 
$\overline 3 $m
a = 4.1328(3) Å
2.386(71), 2.066(100), 1.461(61), 1.246(29), 1.193(19), 0.948(10), 0.924(21), 0.844(14)
Type material is deposited in the meteorite collections of the Central Siberian Geological Museum of V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia, registration number 52 - meteorite Uakit, and the Museum of the Buryatian Scientific Centre, Siberian Branch of the Russian Academy of Sciences, Ulan-Ude, Russia, registration number Uakit-MBSC435/G84
How to cite: Sharygin, V.V., Ripp, G.S., Yakovlev, G.A., Seryotkin, Y.V., Karmanov, N.S., Izbrodin, I.A., Grokhovsky, V.I. and Khromova, E.A. (2018) Uakitite, IMA 2018-003. CNMNC Newsletter No 43, June 2018, page 781; Mineralogical Magazine, 82, 779–785.
IMA No. 2018-004
Ferrorockbridgeite
(Fe2+,Mn2+)2(Fe3+)3(PO4)3(OH)4(H2O)
Hagendorf-Süd pegmatite mine, 76 metre level, Hagendorf, Oberpfalz, Bavaria, Germany (49°39′1″N, 12°27′35″E)
Ian E. Grey*, Anthony R. Kampf, Erich Keck, Colin M. MacRae, John Cashion and Yesim Gozukara
*E-mail: [email protected]
Rockbridgeite group
Orthorhombic: Bbmm; structure determined
a = 13.994(1), b = 16.884(1), c = 5.1866(4) Å
6.987(21), 4.853(26), 3.615(24), 3.465(33), 3.424(39), 3.205(100), 2.774(22), 1.603(24)
Type material is deposited in the mineralogical collections of the Museum Victoria, 11 Nicholson St, Carlton, VIC 3053, Australia, registration number M54126 (holotype), and the Natural History Museum of Los Angeles County, 900 Exposition Blvd, Los Angeles, California, USA, catalogue number 67281 (cotype)
How to cite: Grey, I.E., Kampf, A.R., Keck, E., MacRae, C.M., Cashion, J. and Gozukara, Y. (2018) Ferrorockbridgeite, IMA 2018-004. CNMNC Newsletter No 43, June 2018, page 782; Mineralogical Magazine, 82, 779–785.
IMA No. 2018-005
Belogubite
CuZn(SO4)2·10H2O
Gayskoe Zn-Cu deposit, Orenburgskaya Oblast’, South Urals, Russia (51°28′00″N, 58°29′39″E)
Anatoly V. Kasatkin*, Sergey N. Britvin, Radek Škoda, Atali A. Agakhanov, Dmitriy I. Belakovskiy and Nikita V. Chukanov
*E-mail: [email protected]
Chalcanthite group
Triclinic: P 
$\overline 1 $; structure determined
a = 6.2548(1), b = 10.6112(2), c = 6.0439(1) Å, α = 82.587(1), β = 109.625(1), γ = 104.848(1)°
5.73(35), 5.576(47), 4.873(100), 3.907(31), 3.719(45), 3.229(27), 2.915(25), 2.684(26)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninsky Prospekt 18-2, 119071 Moscow, Russia, registration number 5130/1
How to cite: Kasatkin, A.V., Britvin, S.N., Škoda, R., Agakhanov, A.A., Belakovskiy, D.I. and Chukanov, N.V. (2018) Belogubite, IMA 2018-005. CNMNC Newsletter No 43, June 2018, page 782; Mineralogical Magazine, 82, 779–785.
IMA No. 2018-007
Dalnegorskite
Ca5Mn(Si3O9)2
Dalnegorskoe boron deposit, Dalnegorsk, Primorskiy Kray, Russian Far East, Russia
Nadezhda V. Shchipalkina*, Igor V. Pekov, Dmitry A. Ksenofontov, Nikita V. Chukanov, Dmitry I. Belakovskiy and Natalya N. Koshlyakova
*E-mail: [email protected]
Closely related to bustamite
Triclinic: P 
$\overline 1 $; structure determined
a = 7.259(1), b = 7.857(1), c = 7.8765(6) Å, α = 88.55(1), β = 62.58(1), γ = 76.621(6)°
3.284(41), 2.952(100), 2.951(70), 2.280(45), 1.815(92), 1.740(39), 1.708(34), 1.465(39)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninsky Prospekt 18-2, 119071 Moscow, Russia, registration number 5184/1
How to cite: Shchipalkina, N.V., Pekov, I.V., Ksenofontov, D.A., Chukanov, N.V., Belakovskiy, D.I. and Koshlyakova, N.N. (2018) Dalnegorskite, IMA 2018-007. CNMNC Newsletter No 43, June 2018, page 782; Mineralogical Magazine, 82, 779–785.
IMA No. 2018-008
Zubkovaite
Ca3Cu3(AsO4)4
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*, Inna S. Lykova, Atali A. Agakhanov, Dmitry I. Belakovskiy, Marina F. Vigasina, Sergey N. Britvin, Anna G. Turchkova, Evgeny G. Sidorov and Katharina S. Scheidl
*E-mail: [email protected]
New structure type
Monoclinic: C2; structure determined
a = 16.836(3), b = 5.0405(8), c = 9.117(2) Å, β = 117.39(1)°
7.44(100), 3.727(79), 3.334(92), 2.914(73), 2.789(48), 2.765(50), 2.591(96), 2.521(53)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninsky Prospekt 18-2, 119071 Moscow, Russia, registration number 5185/1
How to cite: Pekov, I.V., Lykova, I.S., Agakhanov, A.A., Belakovskiy, D.I., Vigasina, M.F., Britvin, S.N., Turchkova, A.G., Sidorov, E.G. and Scheidl, K.S. (2018) Zubkovaite, IMA 2018-008. CNMNC Newsletter No 43, June 2018, page 782; Mineralogical Magazine, 82, 779–785.
IMA No. 2018-009
Phoxite
(NH4)2Mg2(C2O4)(PO3OH)2(H2O)4
Rowley mine, 125-foot level, Theba, Painted Rock district, Maricopa Co., Arizona, USA (33°2′57″N, 113°1′49.59″W)
Anthony R. Kampf*, Aaron J. Celestian, Barbara P. Nash and Joe Marty
*E-mail: [email protected]
New structure type
Monoclinic: P21/c; structure determined
a = 7.2962(3), b = 13.5993(4), c = 7.8334(6) Å, β = 108.271(8)°
6.17(100), 5.57(85), 3.799(60), 3.377(59), 2.914(72), 3.536(32), 2.425(37), 2.275(63)
Cotype material is deposited in the mineralogical collections of the Natural History Museum of Los Angeles County, 900 Exposition Blvd, Los Angeles, California, USA, catalogue numbers 66697, 66698, 66699 and 66700
How to cite: Kampf, A.R., Celestian, A.J., Nash, B.P. and Marty, J. (2018) Phoxite, IMA 2018-009. CNMNC Newsletter No 43, June 2018, page 783; Mineralogical Magazine, 82, 779–785.
IMA No. 2018-011
Achyrophanite
(K,Na)3(Fe3+,Ti,Al,Mg)5O2(AsO4)5
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, Atali A. Agakhanov, Sergey N. Britvin, Anna G. Turchkova, Evgeny G. Sidorov and Dmitry Y. Pushcharovsky
*E-mail: [email protected]
New structure type
Orthorhombic: P2221; structure determined
a = 6.5824(2), b = 13.2488(4), c = 10.7613(3) Å
5.615(59), 4.174(42), 3.669(31), 3.148(33), 2.852(43), 2.814(100), 2.689(29), 2.237(28)
Type material is deposited in the collections of the Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia, registration number 5029/1
How to cite: Pekov, I.V., Zubkova, N.V., Koshlyakova, N.N., Belakovskiy, D.I., Vigasina, M.F., Agakhanov, A.A., Britvin, S.N., Turchkova, A.G., Sidorov, E.G. and Pushcharovsky, D.Y. (2018) Achyrophanite, IMA 2018-011. CNMNC Newsletter No 43, June 2018, page 783; Mineralogical Magazine, 82, 779–785.
IMA No. 2018-012
Dokuchaevite
Cu8O2(VO4)3Cl3
Yadovitaya (‘Poisonous’) fumarole, Second scoria cone of the Northern Breakthrough of the Great Tolbachik Fissure Eruption, Tolbachik volcano, Kamchatka peninsula, Far-Eastern Region, Russia (55°50′N, 160°20′E)
Oleg I. Siidra*, Evgeny V. Nazarchuk, Anatoly N. Zaitsev, Yury S. Polekhovsky, Thomas Wenzel and John Spratt
*E-mail: [email protected]
Chemically and structurally related to yaroshevite
Triclinic: P 
$\overline 1 $; structure determined
a = 6.332(3), b = 8.204(4), c = 15.562(8) Å, α = 90.498(8), β = 97.173(7), γ = 90.896(13)°
15.440(18), 7.276(27), 5.596(43), 4.857(33), 3.193(29), 2.791(30), 2.564(21), 2.522(100)
Type material is deposited in the collections of the Mineralogical Museum, Department of Mineralogy, St Petersburg State University, St Petersburg, Russia, specimen number 1/19664
How to cite: Siidra, O.I., Nazarchuk, E.V., Zaitsev, A.N., Polekhovsky, Y.S., Wenzel, T. and Spratt, J. (2018) Dokuchaevite, IMA 2018-012. CNMNC Newsletter No 43, June 2018, page 783; Mineralogical Magazine, 82, 779–785.
IMA No. 2018-013
Koryakite
NaKMg2Al2(SO4)6
Yadovitaya (‘Poisonous’) fumarole, Second scoria cone of the Northern Breakthrough of the Great Tolbachik Fissure Eruption, Tolbachik volcano, Kamchatka peninsula, Far-Eastern Region, Russia (55°50′N, 160°20′E)
Evgeny V. Nazarchuk, Oleg I. Siidra*, Anatoly N. Zaitsev and Natalia S. Vlasenko
*E-mail: [email protected]
Structurally related to millosevichite and mikasaite
Trigonal: R 
$\overline 3 $; structure determined
a = 8.1124(11), c = 22.704(7) Å
5.936(10), 3.585(55), 2.763(100), 2.633(7), 2.340(22), 2.158(12), 1.991(9), 1.789(30)
Type material is deposited in the collections of the Mineralogical Museum, Department of Mineralogy, St Petersburg State University, St Petersburg, Russia, specimen number 1/19688
How to cite: Nazarchuk, E.V., Siidra, O.I., Zaitsev, A.N. and Vlasenko, N.S. (2018) Koryakite, IMA 2018-013. CNMNC Newsletter No 43, June 2018, page 784; Mineralogical Magazine, 82, 779–785.
IMA No. 2018-014
Aleutite
[Cu5O2](AsO4)(VO4)·(Cu,K,Pb,Rb,Cs,)Cl
Yadovitaya (‘Poisonous’) fumarole, Second scoria cone of the Northern Breakthrough of the Great Tolbachik Fissure Eruption, Tolbachik volcano, Kamchatka peninsula, Far-Eastern Region, Russia (55°50′N, 160°20′E)
Oleg I. Siidra*, Evgeny V. Nazarchuk, Atali A. Agakhanov and Yury S. Polekhovsky
*E-mail: [email protected]
New structure type
Monoclinic: C2/m; structure determined
a = 18.090(2), b = 6.2284(6), c = 8.2465(9) Å, β = 90.597(2)°
4.796(46), 3.396(29), 2.985(48), 2.934(74), 2.913(31), 2.825(36), 2.567(30), 2.449(100)
Type material is deposited in the collections of the Mineralogical Museum, Department of Mineralogy, St Petersburg State University, St Petersburg, Russia, specimen number 1/19689
How to cite: Siidra, O.I., Nazarchuk, E.V., Agakhanov, A.A. and Polekhovsky, Y.S. (2018) Aleutite, IMA 2018-014. CNMNC Newsletter No 43, June 2018, page 784; Mineralogical Magazine, 82, 779–785.
IMA No. 2018-015
Elasmochloite
Na3Cu6BiO4(SO4)5
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*, Sergey N. Britvin, Atali A. Agakhanov, Marina F. Vigasina and Evgeny G. Sidorov
*E-mail: [email protected]
New structure type
Monoclinic: P21/n; structure determined
a = 10.1273(9), b = 10.1193(8), c = 21.112(2) Å, β = 102.272(8)°
10.33(100), 7.04(18), 6.33(14), 3.576(24), 3.397(13), 2.920(14), 2.529(14), 2.460(14)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia, registration number 5189/1
How to cite: Pekov, I.V., Britvin, S.N., Agakhanov, A.A., Vigasina, M.F. and Sidorov, E.G. (2018) Elasmochloite, IMA 2018-015. CNMNC Newsletter No 43, June 2018, page 784; Mineralogical Magazine, 82, 779–785.
IMA No. 2018-016
Majzlanite
K2Na(ZnNa)Ca(SO4)4
Yadovitaya (‘Poisonous’) fumarole, Second scoria cone of the Northern Breakthrough of the Great Tolbachik Fissure Eruption, Tolbachik volcano, Kamchatka peninsula, Far-Eastern Region, Russia (55°50′N, 160°20′E)
Oleg I. Siidra*, Evgeny V. Nazarchuk, Anatoly N. Zaitsev and Vladimir V. Shilovskikh
*E-mail: [email protected]
New structure type
Monoclinic: C2/c; structure determined
a = 16.007(2), b = 9.524(1), c = 9.118(1) Å, β = 94.828(7)°
3.372(40), 3.147(56), 3.106(65), 2.949(50), 2.874(100), 2.835(70), 2.803(45), 2.616(41)
Type material is deposited in the collections of the Mineralogical Museum, Department of Mineralogy, St Petersburg State University, St Petersburg, Russia, specimen number 1/19690
How to cite: Siidra, O.I., Nazarchuk, E.V., Zaitsev, A.N. and Shilovskikh, V.V. (2018) Majzlanite, IMA 2018-016. CNMNC Newsletter No 43, June 2018, page 784; Mineralogical Magazine, 82, 779–785.
IMA No. 2018-017
Jahnsite-(NaMnMg)
(Na,Ca)(Mn2+,Fe3+)(Mg,Fe3+)2Fe3+2(PO4)4(OH)2(H2O)8
Sapucaia pegmatite, Conselheiro Pena district, Minas Gerais, Brazil (18°54′38″S, 41°29′61″W)
Anthony R. Kampf*, Barbara P. Nash, Luigi Chiappino and Sergio Varvello
*E-mail: [email protected]
Jahnsite group
Monoclinic: P2/a; structure determined
a = 15.104(1), b = 7.1629(2), c = 9.8949(7) Å, β = 110.640(7)°
9.29(100), 5.02(27), 4.91(30), 3.546(32), 2.975(26), 2.834(91), 2.601(33), 1.944(33)
Type material is deposited in the collections of the Mineral Sciences Department, Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, California 90007, USA, catalogue number 66701
How to cite: Kampf, A.R., Nash, B.P., Chiappino, L. and Varvello, S. (2018) Jahnsite-(NaMnMg), IMA 2018-017. CNMNC Newsletter No 43, June 2018, page 787; Mineralogical Magazine, 82, 779–785.
NOMENCLATURE PROPOSALS APPROVED IN APRIL 2018
Jahnsite group
The jahnsite group is established. Minerals within the jahnsite group conform to the general formula XM1M22M32(H2O)8(OH)2(PO4)4. The jahnsite group is divided into the jahnsite subgroup (M3 = Fe3+), which currently inclues ten mineral species, and the whiteite subgroup (M3 = Al), which currently inclues seven mineral species.
Welinite group
The welinite group is established. Minerals within the welinite group conform to the general formula M22+6(M1aM1b)x+(SiO4)2O(x–2)(OH)(8–x), where x is the total charge per formula unit at the M1 sites. The welinite group currently includes four mineral species, all of them having M2 = Mn2+: welinite (M1 = W6+□), franciscanite (M1 = V5+□), örebroite (M1 = Sb5+Fe3+), and barwoodite (M1 = Nb5+□).
Ursilite: name discredited
Currently the IMA List of Minerals includes as valid species the following three minerals, all with G (=grandfathered) status: calcioursilite, Ca4(UO2)4(Si2O5)5(OH)6·15H2O; magnioursilite, Mg4(UO2)4(Si2O5)5(OH)6·20H2O; ursilite, Mg4(UO2)4(Si2O5)5.5(OH)5·13H2O. Historically, calcioursilite and magnioursilite were described together in 1957 as ‘ursilite’ from the Oktyabr'skoye deposit, Kyzyltyube-Saj, Samgar Steppe, Tajikistan [Voprosy Geologii Urana (Problems of the Uranium Geology), Atomic Press, Moscow, 73 (1957)]. At that occurrence, analyses with Ca > Mg and Mg > Ca were recorded. Subsequently, calcioursilite and magnioursilite were defined instead of ursilite [Proc. 2nd U.N. Int. Conf. on the Peaceful Uses of Atomic Energy, 2, 298–299 (1958); ibidem, 3, 174–177 (1959)]. Therefore today the name ‘ursilite’ is nothing but an obsolete redundancy, and should be officially discredited. This is an executive decision taken by the officers of the IMA CNMNC.
NOMENCLATURE PROPOSALS APPROVED IN MAY 2018
IMA 18-B: Discreditation of the mineral name ‘marshallsussmanite’ with a reinstatement of the name schizolite
Proposal 18-B is accepted, and ‘marshallsussmanite’ (IMA No. 2013-067) is renamed schizolite, according to historical priority.
