Mineralien / Minerals / Minerales > Systematik und Klassifikation / Systematics and Classification

Neue Mineralien anerlannt von der IMA CNMNC im Mai und Juni 2016

(1/1)

Stefan:
NEW MINERAL PROPOSALS APPROVED IN APRIL 2016

IMA No. 2015-120
Wrightite
K2Al2O(AsO4)2
In a fumarole at the Second cinder cone of the Northern Breach of the Great Tolbachik Fissure Eruption, Tolbachik volcano, Kamchatka Peninsula, Far-Eastern Region, Russia (55°41′N, 160°14′E, 1200 m asl)
Andrey P. Shablinskii, Stanislav K. Filatov, Lidiya P. Vergasova, Evgenia Y. Avdontseva und Svetlana V. Moskaleva
E-mail: shablinskii.andrey@mail.ru
Neuer Strukturtyp
Orthorhombisch: Pnma; Struktur bestimmt
a = 8.2377(3), b = 5.5731(6), c = 17.683(1) Å
8.77(36), 6.01(18), 4.458(17), 4.097(16), 4.010(19), 3.875(19), 3.003(16), 2.972(100)
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 1/19653
How to cite: Shablinskii, A.P., Filatov, S.K., Vergasova, L.P., Avdontseva, E.Y. und Moskaleva, S.V. (2016) Wrightite, IMA 2015-120. CNMNC Newsletter No. 31, June 2016, page 692; Mineralogical Magazine, 80, 691–697.

IMA No. 2015-121
Matyhite
Ca18(Ca,☐)2Fe2+2(PO4)14
D'Orbigny angrite, D'Orbigny, Coronel Suaréz, Buenos Aires, Argentina (37°40′S,61°39′W)
Shyh-Lung Hwang, Pouyan Shen, Hao-Tsu Chu, Tzen-Fu Yui, Maria Eugenia Varela und Yoshiyuki Iizuka
E-mail: slhwang@mail.ndhu.edu.tw
Merrillit-Gruppe
Trigonal: R3c
a = 10.456(7), c = 37.41(3) Å
6.52(s), 5.24(m), 3.46(s), 3.21(s), 3.02(m), 2.88(vs), 2.75(m), 2.62(vs)
Type material is deposited in the collections of the Naturhistorisches Museum Wien, Austria, catalogue number Section D′Orbigny C-N1172-NH Wien
How to cite: Hwang, S.-L., Shen, P., Chu, H.-T., Yui, T.-F., Varela, M.E. und Iizuka, Y. (2016) Matyhite, IMA 2015-121. CNMNC Newsletter No. 31, June 2016, page 692; Mineralogical Magazine, 80, 691–697.

IMA No. 2015-122
Huenite
Cu4(MoO4)3(OH)2
San Samuel Mine, Carrera Pinto, Cachiyuyo de Llampos district, Copiapó Province, Atacama Region, Chile (27°4′40″S, 70°0′10″W)
Pietro Vignola, G. Diego Gatta, Marco Merlini, Nicola Rotiroti, Frédéric Hatert, Danilo Bersani, Andrea Risplendente, Paolo Gentile und Alessandro Pavese
E-mail: pietro.vignola@idpa.cnr.it
Chemically related to lindgrenite
Trigonal: P31/c; Struktur bestimmt
a = 7.728(5), c = 9.504(6) Å
6.786(25), 5.372(24), 3.810(51), 2.974(100), 2.702(41), 2.497(38), 1.712(60), 1.450(37)
Type material is deposited in the mineralogical collections of the Laboratoire de Minéralogie, University of Liège, Belgium, catalogue no. 20399
How to cite: Vignola, P., Gatta, G.D., Merlini, M., Rotiroti, N., Hatert, F., Bersani, D., Risplendente, A., Gentile, P. und Pavese, A. (2016) Huenite, IMA 2015-122. CNMNC Newsletter No. 31, June 2016, page 692; Mineralogical Magazine, 80, 691–697.

IMA No. 2015-123
Braunerite
K2Ca(UO2)(CO3)3·6H2O
Svornost mine, Jáchymov ore district, Western Bohemia, Czech Republic (50°22′21″N, 12°54′42″E)
Jakub Plášil, Kurt Mereiter, Anthony R. Kampf, Jan Hloušek, Radek Škoda, Jiří Čejka, Ivan Němec und Jana Ederová
E-mail: plasil@fzu.cz
Neuer Strukturtyp
Monoklin: P21/c; Struktur bestimmt
a = 17.6725(12), b = 11.6065(5), c = 29.673(3) Å, β = 101.780(8)°
14.64(100), 7.29(65), 7.04(20), 6.25(15), 5.71(28), 4.991(18), 4.860(18), 4.118(50)
Type material is deposited in the collections of the Department of Mineralogy und Petrology, National Museum, Cirkusová 1740, Prague 9, Czech Republic, catalogue number P1P 14/2015, und the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue number 65631
How to cite: Plášil, J., Mereiter, K., Kampf, A.R., Hloušek, J., Škoda, R., Čejka, J., Němec, I. und Ederová, J. (2016) Braunerite, IMA 2015-123. CNMNC Newsletter No. 31, June 2016, page 692; Mineralogical Magazine, 80, 691–697.

IMA No. 2015-124
Wayneburnhamite
Pb9Ca6(Si2O7)4(SiO4)O
Commercial quarry, Crestmore, Sky Blue Hill, Riverside Co., California, USA (34°01′24.6″N, 117°23′04.6″W)
Anthony R. Kampf, Robert M. Housley und George R. Rossman
E-mail: akampf@nhm.org
Isostructural with ganomalite
Hexagonal: P-6
Struktur bestimmt
a = 9.8953(9), c = 10.2054(7) Å
4.95(52), 4.45(64), 3.550(77), 3.232(54), 3.086(100), 2.847(60), 2.798(48), 2.734(83)
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 numbers 65639 (holotype) und 65640 (cotype)
How to cite: Kampf, A.R., Housley, R.M. und Rossman, G.R. (2016) Wayneburnhamite, IMA 2015-124. CNMNC Newsletter No. 31, June 2016, page 693; Mineralogical Magazine, 80, 691–697.

IMA No. 2015-125
Cardite
Zn5.5(AsO4)2(AsO3OH)(OH)3·3H2O
Block 14 Opencut, Broken Hill, New South Wales, Australia (31°57′33″S, 141°28′30″E)
Peter Elliott
E-mail: peter.elliott@adelaide.edu.au
Neuer Strukturtyp
Orthorhombisch: Cmcm; Struktur bestimmt
a = 15.110(3), b = 15.492(3), c = 6.385(1) Å
10.783(100), 7.564(85), 4.143(48), 3.328(31), 3.012(20), 2.763(31), 2.668(24), 2.451(21)
Type material is deposited in the mineralogical collections of the South Australian Museum, Adelaide, Australia, Registrierungsnummer G34301
How to cite: Elliott, P. (2016) Cardite, IMA 2015-125. CNMNC Newsletter No. 31, June 2016, page 693; Mineralogical Magazine, 80, 691–697.

IMA No. 2015-126
Selivanovaite
(Na,Ca)3(Ti,Fe)5[Si4O18(OH)3]·7H2O
In drill cores (100–130 m underground) at the Lovozero Eudialyte Complex, Mt. Alluaiv, Kola Peninsula, Russia
Yakov A. Pakhomovsky, Taras L. Panikirovskii, Victor N. Yakovenchuk, Gregory Y. Ivanyuk, Julia A. Mikhailova, Sergei V. Krivovichev und Vladimir N. Bocharov
E-mail: ivanyuk@geoksc.apatity.ru
Neuer Strukturtyp
Triclinic: P-1
a = 8.671(1), b = 8.686(1), c = 12.217 (1) Å, α = 92.68(1), β = 108.52(1), γ = 105.42(1)°
11.43(100), 6.37(25), 5.73(15), 4.208(16), 3.108(35), 3.043(20), 2.596(17), 2.496(14)
Type material is deposited in the collections of the Mineralogical Museum, St. Petersburg State University, St. Petersburg, Russia, catalogue no. 19649, und the Geological und the Mineralogical Museum, Geological Institute, Kola Science Centre, Apatity, Russia, catalogue no. 7538
How to cite: Pakhomovsky, Y.A., Panikirovskii, T.L., Yakovenchuk, V.N., Ivanyuk, G.Y., Mikhailova, J.A., Krivovichev, S.V. und Bocharov, V.N. (2016) Selivanovaite, IMA 2015-126. CNMNC Newsletter No. 31, June 2016, page 693; Mineralogical Magazine, 80, 691–697.

IMA No. 2015-127
Příbramite
CuSbSe2
At the mine dump of shaft No. 16 – Háje, near Příbram, Central Bohemia, Czech Republic (49°40′33.894″N, 14°3′29.922″E)
Pavel Škácha, Jiří Sejkora und Jakub Plášil
E-mail: skacha-p@muzeum-pribram.cz
The Se analogue of chalcostibite
Orthorhombisch: Pnma; Struktur bestimmt
a = 6.304(1), b = 3.980(1), c = 14.989(4) Å
3.152(40), 3.113(100), 3.085(40), 3.070(30), 2.394(63), 1.990(38), 1.844(42), 1.833(33)
Cotype material is deposited in the collections of the Department of Mineralogy und Petrology, National Museum, Cirkusová 1740, Praha 9, Czech Republic, catalogue number P1P 15/2015, und the Mining Museum Příbram, Czech Republic, catalogue number 1/2016
How to cite: Škácha, P., Sejkora, J. und Plášil, J. (2016) Příbramite, IMA 2015-127. CNMNC Newsletter No. 31, June 2016, page 693; Mineralogical Magazine, 80, 691–697.

IMA No. 2015-128
Leoszilardite
Na6Mg(UO2)2(CO3)6·6H2O
Markey Mine, Red Canyon, White Canyon District, San Juan Co., Utah, USA (37°32′57″N, 110°18′2″W)
Travis A. Olds, Luke Sadergaski, Jakub Plášil, Anthony R. Kampf, Peter C. Burns, Ian M. Steele und Joe Marty
E-mail: tolds@nd.edu
Neuer Strukturtyp
Monoklin: C2/m; Struktur bestimmt
a = 11.609(2), b = 6.784(1), c = 15.106(3) Å, β = 91.378(3)°
7.59(36), 5.46(100), 4.64(28), 3.82(30), 3.383(33), 3.105(25), 2.864(31), 2.028(28)
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 65645.
How to cite: Olds, T.A., Sadergaski, L., Plášil, J., Kampf, A.R., Burns, P.C., Steele, I.M. und Marty, J. (2016) Leoszilardite, IMA 2015-128. CNMNC Newsletter No. 31, June 2016, page 694; Mineralogical Magazine, 80, 691–697.

IMA No. 2016-001
Whiteite-(CaMgMg)
CaMg3Al2(PO4)4(OH)2·8H2O
Northern Belle mine (aka Argentum mine), Candelaria district, Mineral Co., Nevada, USA (38°9′22″N, 118°5′8″W)
Anthony R. Kampf, Paul M. Adams und Barbara P. Nash
E-mail: akampf@nhm.org
Jahnsit-Gruppe
ö: P2/a; Struktur bestimmt
a = 14.824(2), b = 7.0302(3), c = 9.946(3) Å, β = 110.115(12)°
9.20(82), 4.88(64), 3.510(35), 2.936(40), 2.849(45), 2.805(100), 2.549(34), 1.953(35)
Cotype 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 numbers 65642 und 65643
How to cite: Kampf, A.R., Adams, P.M. und Nash, B.P. (2016) Whiteite-(CaMgMg), IMA 2016-001. CNMNC Newsletter No. 31, June 2016, page 694; Mineralogical Magazine, 80, 691–697.

IMA No. 2016-002
Cesiodymite
CsKCu5O(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, Natalia V. Zubkova, Atali A. Agakhanov, Vasiliy O. Yapaskurt, Dmitry I. Belakovskiy, Marina F. Vigasina, Sergey N. Britvin, Evgeny G. Sidorov und Dmitry Y. Pushcharovsky
E-mail: igorpekov@mail.ru
Isostructural with cryptochalcite
Triclinic: P-1
Struktur bestimmt
a = 10.0682(4), b = 12.7860(7), c = 14.5486(8) Å, α = 102.038(5), β = 100.847(4), γ = 89.956(4)°
6.95(54), 3.946(100), 3.765(37), 3.404(39), 3.188(50), 3.149(27), 3.104(28), 2.681(31)
Type material is deposited in the collections of the Fersman Mineralogisches Museum, Russische Akademie der Wissenschaften, Moskau, Russland, Registrierungsnummer 4842/1
How to cite: Pekov, I.V., Zubkova, N.V., Agakhanov, A.A., Yapaskurt, V.O., Belakovskiy, D.I., Vigasina, M.F., Britvin, S.N., Sidorov, E.G. und Pushcharovsky, D.Y. (2016) Cesiodymite, IMA 2016-002. CNMNC Newsletter No. 31, June 2016, page 694; Mineralogical Magazine, 80, 691–697.

IMA No. 2016-004
Gauthierite
KPb[(UO2)7O5(OH)7]·8H2O
Shinkolobwe mine, Shaba province, Democratic Republic of Congo (11°02′S, 26°35′E)
Travis A. Olds, Jakub Plášil, Anthony R. Kampf, Radek Škoda, Peter C. Burns, Jiří Čejka, Vincent Bourgoin und Jean-Claude Boulliard
E-mail: plasil@fzu.cz
Neuer Strukturtyp
Monoklin: P21/c; Struktur bestimmt
a = 29.844(2), b = 14.5368(8), c = 14.0406(7) Å, β = 103.708(6)° 7.28(49), 3.566(67), 3.192(100), 2.541(18), 2.043(14), 2.001(23), 1.962(14), 1.783(17)
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 65644
How to cite: Olds, T.A., Plášil, J., Kampf, A.R., Škoda, R., Burns, P.C., Čejka, J., Bourgoin, V. und Boulliard, J.-C. (2016) Gauthierite, IMA 2016-004. CNMNC Newsletter No. 31, June 2016, page 695; Mineralogical Magazine, 80, 691–697.

IMA No. 2016-005
Luogufengite
Fe2O3
Menan Volcanic Complex, near Rexburg, Madison Co., Idaho, USA
Huifang Xu und Seungyeol Lee
E-mail: hfxu@geology.wisc.edu
A polymorph of hematite und maghemite
Orthorhombisch: Pna21; Struktur bestimmt
a = 5.051(2), b = 8.717(3), c = 9.382(5) Å
3.198(27), 2.944(25), 2.697(100), 2.525(40), 2.437(32), 1.716(24), 1.505(41), 1.455(37)
Type material is deposited in the collections of the Geology Museum of the Department of Geoscience, University of Wisconsin, 1215 West Dayton Street, Madison, WI 53706, USA, specimen numbers UWGM 2341, UWGM 2342 und UWGM 2343
How to cite: Xu, H. und Lee, S. (2016) Luogufengite, IMA 2016-005. CNMNC Newsletter No. 31, June 2016, page 695; Mineralogical Magazine, 80, 691–697.

NEW MINERAL PROPOSALS APPROVED IN MAY 2016

IMA No. 2016-006
Hydroxyferroroméite
(Fe2+1.5☐0.5)Sb5+2O6(OH)
Correc d'en Llinassos, near the village of Oms, Pyrénées-Orientales Department, France (42°32′16″N, 2°42′26″E)
Stuart J. Mills, Andrew G. Christy, Mike S. Rumsey, John Spratt, Erica Bittarello, Georges Favreau, Marco E. Ciriotti und Christian Berbain
E-mail: smills@museum.vic.gov.au
Pyrochlore supergroup
Cubic: Fd-3m
a = 10.25(3) Å
5.971(65), 3.190(63), 3.069(100), 2.681(48), 2.005(63), 1.935(25), 1.785(43)
Type material is deposited in the mineralogical collections of the Museum Victoria, Melbourne, Victoria, Australia, Registrierungsnummer M53584, und the Natural History Museum, London, UK, Registrierungsnummer BM2016,2
How to cite: Mills, S.J., Christy, A.C., Rumsey, M.S., Spratt, J., Bittarello, E., Favreau, G., Ciriotti, M.E. und Berbain, C. (2016) Hydroxyferroroméite, IMA 2016-006. CNMNC Newsletter No. 31, June 2016, page 695; Mineralogical Magazine, 80, 691–697.

IMA No. 2016-007
Wangdaodeite
FeTiO3
In shock veins of the Suizhou L6 meteorite, fell down in the suburb of Suizhou City, Hubei Province, China
Xiande Xie, Xiangping Gu, Hexiong Yang, Ming Chen und Kai Li
E-mail: xdxie@gzb.ac.cn
A dimorph of ilmenite
Trigonal: R3c
a = 5.1158(2), c = 13.7805(6) Å
3.745(72), 2.715(100), 2.562(89), 2.231(57), 1.859(59), 1.619(41), 1.507(44), 1.479(38)
Cotype material is deposited in the mineralogical collections of the Geological Museum, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 511 Kehua Street, Tianhe District, Guangzhou 510640, China, catalogue number 15010, the Mineral Museum of the University of Arizona, Tucson AZ 85721-0077, USA, catalogue number 21312, und the RRUFF Project, deposition number R150142
How to cite: Xie, X., Gu, X., Yang, H., Chen, M. und Li, K. (2016) Wangdaodeite, IMA 2016-007. CNMNC Newsletter No. 31, June 2016, page 695; Mineralogical Magazine, 80, 691–697.

IMA No. 2016-008
Ferro-ferri-katophorite
Na(NaCa)(Fe2+4Fe3+)(Si7Al)O22(OH)2
Along the eastern flank of the Sierra de Maz, near the town of Villa Unión, Coronel Felipe Varela department, La Rioja province, Argentina
Fernando Colombo, Jordi Rius, Elies Molins, Héctor Biglia, Miguel Á. Galliski, María Florencia Márquez-Zavalía, Edgardo G.A. Baldo und Agustín Kriscautzky
E-mail: fosfatos@yahoo.com.ar
Amphibole supergroup
Monoklin: C2/m; Struktur bestimmt
a = 9.8270(7), b = 18.0300(8), c = 5.316(4) Å, β = 104.626(3)°
8.446(100), 3.405(9), 3.284(14), 3.135(50), 2.815(26), 2.720(18), 2.173(9), 2.026(9)
Type material is deposited in the collections of the Museo de Mineralogía “Dr. Alfred Stelzner”, Universidad Nacional de Córdoba (Argentina), catalogue number MS003341
How to cite: Colombo, F., Rius, J., Molins, E., Biglia, H., Galliski, M.Á., Márquez-Zavalía, M.F., Baldo, E.G.A. und Kriscautzky, A. (2016) Ferro-ferri-katophorite, IMA 2016-008. CNMNC Newsletter No. 31, June 2016, page 696; Mineralogical Magazine, 80, 691–697.

IMA No. 2016-009
Hydroxylgugiaite
(Ca,☐)2(Si,Be)(Be,Si)2O5(OH)2
1. Langangen, Blåfjell, between Larvik und Porsgrunn, Telemark, Norway (59°5′31″N, 9°47′35″E, 75 m asl); 2. Saga I quarry, Mørje, Porsgrunn, Telemark, Norway (59°2′40″N, 9°50′00″, 100 m asl)
Joel Grice, Roy Kristiansen, Henrik Friis, Ralph Rowe, Mark Cooper, Glenn Poirier und Panseok Yang
E-mail: jgrice@mus-nature.ca
Closely related to gugiaite
Tetragonal: P-421m
a = 7.415(1), c = 4.965(1) Å
3.604(27), 2.971(34), 2.755(100), 2.348(17), 2.318(26), 2.212(26), 1.987(19), 1.706(22)
Cotype material is deposited in the mineralogical collections of the Canadian Museum of Nature, Ottawa, Canada, Registrierungsnummer CMNMC 86555
How to cite: Grice, J., Kristiansen, R., Friis, H., Rowe, R., Cooper, M., Poirier, G. und Yang, P. (2016) Hydroxylgugiaite, IMA 2016-009. CNMNC Newsletter No. 31, June 2016, page 696; Mineralogical Magazine, 80, 691–697.

IMA No. 2016-010
Edtollite
K2NaCu5Fe3+O2(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, Natalia V. Zubkova, Atali A. Agakhanov, Leonid A. Pautov, Marina F. Vigasina, Evgeny G. Sidorov, Dmitry A. Ksenofontov, Sergey N. Britvin and
Dmitry Y. Pushcharovsky
E-mail: igorpekov@mail.ru
Neuer Strukturtyp
Triclinic: P-1
Struktur bestimmt
a = 5.1168(6), b = 9.124(1), c = 9.698(1) Å, α = 110.12(1), β = 102.45(1), γ = 92.85(1)°
8.79(92), 7.63(41), 5.22(44), 3.427(100), 3.148(64), 2.851(65), 2.569(77), 2.551(40)
Type material is deposited in the collections of the Fersman Mineralogisches Museum, Russische Akademie der Wissenschaften, Moskau, Russland, Registrierungsnummer 4851/1
How to cite: Pekov, I.V., Zubkova, N.V., Agakhanov, A.A., Pautov, L.A., Vigasina, M.F., Sidorov, E.G., Ksenofontov, D.A., Britvin, S.N. und Pushcharovsky, D.Y. (2016) Edtollite, IMA 2016-010. CNMNC Newsletter No. 31, June 2016, page 696; Mineralogical Magazine, 80, 691–697.

IMA No. 2016-011
Cabvinite
Th2F7(OH)·3H2O
Su Seinargiu, Sarroch, Cagliari, Sardinia, Italy
Paolo Orlandi, Cristian Biagioni und Federica Zaccarini
E-mail: biagioni@dst.unipi.it
Neuer Strukturtyp
Tetragonal: I4/m; Struktur bestimmt
a = 11.3689(2), c = 6.4175(1) Å
8.02(ms), 5.66(w), 3.975(s), 3.595(m), 2.832(m), 2.125(m), 2.056(m), 2.004(m)
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 19711
How to cite: Orlandi, P, Biagioni, C. und Zaccarini, F. (2016) Cabvinite, IMA 2016-011. CNMNC Newsletter No. 31, June 2016, page 696; Mineralogical Magazine, 80, 691–697.

IMA No. 2016-012
Ewingite
Mg8Ca8(UO2)24(CO3)30O4(OH)12(H2O)138
Plavno Mine, Jáchymov ore district, Western Bohemia, Czech Republic
Travis A. Olds, Jakub Plášil, Anthony R. Kampf, Peter C. Burns, Antonio Simonetti und Luke R. Sadergaski
E-mail: tolds@nd.edu
Neuer Strukturtyp
Tetragonal: I41/acd; Struktur bestimmt
a = 35.401(9), c = 48.157(13) Å
17.8(19), 14.3(31), 10.1(74), 8.28(100), 6.61(24), 6.03(30), 5.69(36), 3.772(17)
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 65686
How to cite: Olds, T.A., Plášil, J., Kampf, A.R., Burns, P.C., Simonetti, A. und Sadergaski, L.R. (2016) Ewingite, IMA 2016-012. CNMNC Newsletter No. 31, June 2016, page 697; Mineralogical Magazine, 80, 691–697.


REVISED CHEMICAL FORMULA

A paper on the mineral cairncrossite has been published recently [European Journal of Mineralogy, 28, 495–505 (2016)] in which the ideal chemical formula of the mineral is given as Sr2Ca7–xNa2x(Si4O10)4(OH)2(H2O)15–x (with 0 ≤ x ≤ 1). In this formula Na is present as an essential component (provided that x > 0), whereas it was lacking in the previously accepted formula of cairncrossite (cf. CNMNC Newsletter 16). These data were examined carefully by the CNMNC officers und were considered reliable. Accordingly it was agreed to modify the formula of cairncrossite in the official IMA List of Minerals.

Navigation

[0] Themen-Index