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Mineralogical ClassificationNew minerals approved by IMA CNMNC in October and November 2016

1st Dec 2016 10:15 UTCMarco E. Ciriotti Manager

NEW MINERAL PROPOSALS APPROVED IN OCTOBER 2016

IMA No. 2016-063

Epifanovite

NaCaCu5(PO4)4[AsO2(OH)2]·7H2O

Kester tin deposit, Arga-Ynnykh-Khai massif,

Sakha Republic, Russia

Victor N. Yakovenchuk, Yakov A. Pakhomovsky, Nataliya G. Konoplyova, Taras L. Panikirovskii, Julia

A. Mikhailova, Vladimir N. Bocharov, Sergey V. Krivovichev and Gregory Y. Ivanyuk*

*E-mail: ivanyuk@geoksc.apatity.ru Related to sampleite and andyrobertsite Monoclinic: P21/m;

structure determined

a = 9.6911(8), b = 9.7547(9), c = 9.963(1) Å,

β = 102.24(1)°

9.73(100), 6.79(35), 4.355(12), 3.072(43),

3.061(24), 3.003(24), 2.698(11), 2.405(10) Type material is deposited in the collections of the

Mineralogical Museum of the St. Petersburg State University, Russia, catalogue No. 19658/1

How to cite: Yakovenchuk, V.N., Pakhomovsky, Y.A., Konoplyova, N.G., Panikirovskii, T.L.,

Mikhailova, J.A., Bocharov, V.N., Krivovichev, S.V. and Ivanyuk, G.Y. (2016) Epifanovite,

IMA 2016-063. CNMNC Newsletter No. 34, December 2016, page 1316; Mineralogical Magazine, 80,

1315–1321.

IMA No. 2016-064

Leesite

K(H2O)2[(UO2)4O2(OH)5]·3H2O

Jomac mine, Brown’s Rim, White Canyon

mining district, San Juan Co., Utah, USA (37°

51′43″N, 110°19′10″W)

Travis A. Olds*, Patrick Haynes, Anthony R. Kampf, Tyler Spano, Jakub Plášil, Shawn M.

Carlson, Peter C. Burns, Antonio Simonetti and Owen P. Mills

*E-mail: tolds@nd.edu

Known synthetic Na analogue

Orthorhombic: Pbca; structure determined

a = 14.866(7), b = 14.126(7), c = 16.772(8) Å

7.45(92), 3.713(24), 3.566(65), 3.219(100),

2.578(28), 2.043(36), 1.982(25), 1.801(18) Cotype material is deposited in the mineral- ogical

collections of the Natural History Museum of Los Angeles County, Los Angeles,

USA, catalogue numbers 66285,

66286 and 66287, and the New Mexico

Bureau of Geology and Mineral Resources,

Socorro, USA, catalogue number 19029

How to cite: Olds, T.A., Haynes, P., Kampf, A. R., Spano, T., Plášil, J., Carlson, S.M., Burns, P.

C., Simonetti, A. and Mills, O.P. (2016) Leesite, IMA 2016-064. CNMNC Newsletter No. 34, December

2016, page 1316; Mineralogical Magazine, 80, 1315–1321.

IMA No. 2016-065

Vondechenite

Cu4CaCl2(OH)8·4H2O

Caspar quarry, Bellerberg volcano, Rhineland-

Palatinate, Germany (50°21′6″N, 7°14′2″E)

Jochen Schlüter*, Thomas Malcherek, Dieter Pohl and

Christof Schäfer

*E-mail: Jochen.Schlueter@uni-hamburg.de

New structure type

Orthorhombic: Cmcm; structure determined

a = 6.653(1), b =15.034(3), c = 6.611(1) Å

7.596(100), 3.070(39), 2.520(49), 2.484(66),

1.730(39), 1.485(29)

Type material is deposited in the collections of the Mineralogical Museum of the University of

Hamburg, Grindelallee 48, D-20146 Hamburg, Germany, catalogue number MM 1366

How to cite: Schlüter, J., Malcherek, T., Pohl, D. and Schäfer, C. (2016) Vondechenite, IMA

2016-065. CNMNC Newsletter No. 34, December 2016, page 1316; Mineralogical Magazine, 80, 1315–1321.

IMA No. 2016-066

Murakamiite

Ca2LiSi3O8(OH)

Iwagi Islet, Ehime Prefecture, Japan (34.263°N, 133.161°E)

Teruyoshi Imaoka*, Mariko Nagashima, Takashi Kano, Jun-Ichi Kimura, Qing Chang and Chihiro Fukuda

*E-mail: imaoka@yamaguchi-u.ac.jp

The Li analogue of pectolite

Triclinic: P-1; structure determined

a = 7.9098(2), b = 7.0320(2), c = 6.9863(2) Å, α

= 90.596(2), β = 95.589(2), γ = 102.767(2)°

6.962(15), 3.845(20), 3.476(16), 3.295(41),

3.225(33), 3.055(49), 2.897(100), 2.284(19) Type material is deposited in the mineralogical

collections of the National Museum of Nature and Science, Tsukuba, Japan, specimen numbers

NSM M4491

How to cite: Imaoka, T., Nagashima, M., Kano, T., Kimura, J.-I., Chang, Q. and Fukuda, C. (2016)

Murakamiite, IMA 2016-066. CNMNC Newsletter No. 34, December 2016, page 1316; Mineralogical

Magazine, 80, 1315–1321.

IMA No. 2016-067

Machiite

Al2Ti3O9

Murchison carbonaceous chondrite, fell at

Murchison, Victoria, Australia (36°37′S, 145°12′E)

Alexander N. Krot

*E-mail: sasha@higp.hawaii.edu The Al analogue of schreyerite Monoclinic: C2/c

a = 17.102, b = 5.025, c = 7.058 Å, β = 106.6°

8.195(100), 4.097(51), 3.382(41), 2.881(79),

2.745(79), 2.512(30), 2.436(44), 1.698(35) Type material is deposited in the meteorite

collections of the Hawai’i Institute of Geophysics and Planetology, University of Hawai’i at Mānoa,

1680 East-West Road, Honolulu, Hawai’i 96822, USA, Murchison section UH80

How to cite: Knot, A.N. (2016) Machiite, IMA

2016-067. CNMNC Newsletter No. 34, December 2016, page 1317; Mineralogical Magazine, 80, 1315–1321.

IMA No. 2016-068

Calciojohillerite

NaCaMg3(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, Atali A. Agakhanov, Natalia V. Zubkova, Dmitry I.

Belakovskiy, Marina F. Vigasina, Anna G. Turchkova, Evgeny G. Sidorov and Dmitry Y.

Pushcharovsky

*E-mail: igorpekov@mail.ru

Alluaudite group

Monoclinic: C2/c; structure determined

a = 11.8405(3), b = 12.7836(2), c = 6.6916(2) Å,

β = 112.425 (3)°

3.509(16), 3.220(19), 2.910(17), 2.758(100),

2.735(25), 2.620(12), 1.661(16), 1.582(11) Type material is deposited in the collections of the

Fersman Mineralogical Museum, Russian

Academy of Sciences, Moscow, Russia, regis- tration number 4893/1

How to cite: Pekov, I.V., Koshlyakova, N.N., Agakhanov, A.A., Zubkova, N.V., Belakovskiy, D.I.,

Vigasina, M.F., Turchkova, A.G., Sidorov, E.G. and Pushcharovsky, D.Y. (2016) Calciojohillerite,

IMA 2016-068. CNMNC Newsletter No. 34, December 2016, page

1317; Mineralogical Magazine, 80, 1315–1321.

IMA No. 2016-069

Oxy-foitite

□(Fe2+Al2)Al6(Si6O18)(BO3)3(OH)3O

Cooma metamorphic Complex, Cooma, New

South Wales, Australia (36°14′S, 149°7′E) Ferdinando Bosi*, Henrik Skogby and Ulf Hålenius

*E-mail: ferdinando.bosi@uniroma1.it

Tourmaline supergroup

Trigonal: R-3m; structure determined

a = 15.9391(7), c = 7.1515(4) Å

6.357(51), 4.220(47), 3.990(49), 3.466(100),

2.953(87), 2.579(98), 2.048(30), 2.041(50) Type material is deposited in the mineralogical

collections of the Museum of Earth Sciences, Department of Earth Sciences, Sapienza

University, P.le A. Moro 5, 00185 Roma, Italy, catalogue number 8829/84

How to cite: Bosi, F., Skogby, H. and Hålenius, U. (2016) Oxy-foitite, IMA 2016-069. CNMNC

Newsletter No. 34, December 2016, page 1317;

Mineralogical Magazine, 80, 1315–1321.

NEW MINERAL PROPOSALS APPROVED IN NOVEMBER 2016

IMA No. 2016-070

Davidsmithite

(Ca,□)2Na6Al8Si8O32

Liset, Selje, Vestlandet, Norway (62°4′N, 5°20′E)

Sid-Ali Kechid*, Roberta Oberti, Giuseppe

Rossi†, Giancarlo Parodi and Sylvain Pont

*E-mail: kechidsa3@yahoo.fr

Related to trinepheline and nepheline Hexagonal: P63; structure determined

a = 9.982(1), c = 8.364(2) Å

4.322(27), 4.182(66), 3.840(93), 3.267(71),

3.006(100), 2.882(41), 2.343(54), 2.305(31)

Type material is deposited in the mineralogical collections of the Muséum National d’Histoire

Naturelle, Paris, France, thin section MNHN215-001

How to cite: Kechid, S.-A., Oberti, R., Rossi, G., Parodi, G. and Pont, P. (2016) Davidsmithite,

IMA 2016-070. CNMNC Newsletter No. 34, December 2016, page 1317; Mineralogical Magazine, 80,

1315–1321.

IMA No. 2016-072

Alpeite

Monte Alpe mine, Monte Alpe, Castiglione

Chiavarese E) - Maissana (SP), Liguria, Italy

(44°18′24″N, 9°32′00″E)

Anthony R. Kampf*, Cristina Carbone, Barbara P. Nash, Donato Belmonte, Luigi Chiappino and Fabrizio

Castellaro

*E-mail: akampf@nhm.org

Ardennite group

Orthorhombic: Pnmm; structure determined

a = 8.942(1), b = 6.0534(6), c = 18.978(2) Å

4.049(52), 3.259(51), 3.022(93), 2.673(100),

2.572(69), 2.095(53), 1.677(52), 1.511(83) 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 66288

How to cite: Kampf, A.R., Carbone, C., Nash, B. P., Belmonte, D., Chiappino, L. and Castellaro, F.

(2016) Alpeite, IMA 2016-072. CNMNC Newsletter No. 34, December 2016, page 1318; Mineralogical

Magazine, 80, 1315–1321.

IMA No. 2016-073

Magnesiobeltrandoite-2N3S

(Mg6Al2)(Al18Fe3+2)O38(OH)2 [and not Mg8Al18Fe3+2O38(OH)2 as in the newsletter; the last formula is unbalanced]

Marmore stream, middle Valtournenche, Valle

d’Aosta, Italy (45°49′36″N, 7°34′51″E)

Fernando Cámara*, Roberto Cossio, Daniele

Regis, Marco E. Ciriotti and Roberto Compagnoni

*E-mail: fernando.camaraartigas@unimi.it

Högbomite supergroup

Trigonal: P3m1; structure determined

a = 5.7226(3), c = 23.0231(9) Å

2.858(42), 2.735(51), 2.484(46), 2.427(100),

1.568(29), 1.514(30), 1.438(42), 1.429(72)

Type material is deposited in the mineralogical

collections of the Museo Regionale di Scienze

Naturali, Sezione di Mineralogia, Petrografia e

Geologia, via Giovanni Giolitti 36, I-10123

Torino, Italy, catalogue number M/U17182

How to cite: Cámara, F., Cossio, R., Regis, D.,

Ciriotti, M.E. and Compagnoni, R. (2016)

Magnesiobeltrandoite-2N3S, IMA 2016-073.

CNMNC Newsletter No. 34, December 2016,

page 1318; Mineralogical Magazine, 80, 1315–

1321.

IMA No. 2016-074

Zhanghuifenite

Na3Mn2+4Mg2Al(PO4)6

Santa Ana mine, San Luis province, Argentina

(32°53′32″S, 65°55′43″W)

Hexiong Yang*, Anaïs Kobsch, Xiangping Gu, Robert T. Downs and Xiande Xie

*E-mail: hyang@email.arizona.edu Isostructural with bobfergusonite

Monoclinic: P21/n; structure determined

a =12.8926(3), b = 12.4658(3), c = 10.9178(2) Å,

β = 97.920(1)°

6.201(21), 3.445(13), 2.877(25), 2.697(100),

2.527(34), 2.096(14), 1.742(14), 1.561(13) Cotype material is deposited in the

collections of the Mineral Museum of the University of Arizona, Tucson, USA, catalogue

# 21321, and the RRUFF Project, deposition # R160030

How to cite: Yang, H., Kobsch, A., Gu, X., Downs, R.T. and Xie, X. (2016) Zhanghuifenite, IMA

2016-074. CNMNC Newsletter No. 34, December 2016, page 1318; Mineralogical Magazine, 80, 1315–1321.

IMA No. 2016-075

Fluorarrojadite-(BaNa)

BaNa4CaFe13Al(PO4)11(PO3OH)F2

Elisabeth adit, near Gemerská Poloma village,

Rožňava Co., Košice Region, Slovakia (48°45′

04.06″S, 20°29′39.27″W)

Martin Števko*, Jiří Sejkora, Pavel Uher and

Fernando Cámara

*E-mail: stevko@fns.uniba.sk

Arrojadite group

Monoclinic: Cc; structure determined

a = 16.563(1), b = 10.0476(6), c = 24.669(1) Å,

β = 105.452(4)°

3.412(21), 3.224(37), 3.040(100), 2.850(22),

2.833(18), 2.713(56), 2.556(33), 2.512(23)

Type material is deposited in the collections of

the Department of Mineralogy and Petrology,

National Museum, Cirkusová 1740, 193 00

Praha 9, Czech Republic, catalogue number P1P

13/2016, and the Department of Mineralogy and

Petrology, Faculty of Natural Sciences,

Comenius University, Ilkovičova 6, 842 15

Bratislava, Slovakia, catalogue number 7401

How to cite: Števko, M., Sejkora, J., Uher,

P. and Cámara, F. (2016) Fluorarrojadite-

(BaNa), IMA 2016-075. CNMNC Newsletter

No. 34, December 2016, page 1318;

Mineralogical Magazine, 80, 1315–1321.

IMA No. 2016-076

Vorontsovite

(Hg5Cu)Σ6TlAs4S12

Vorontsovskoe gold deposit, 0.5 km west of

the settlement of Vorontsovka, 13 km south of

the city of Krasnotur’insk, Sverdlovskaya

Oblast’, Northern Urals, Russia (59°39′5″N, 60°12′56″E)

Anatoly V. Kasatkin*, Fabrizio Nestola, Atali

A. Agakhanov, Radek Škoda, Vladimir

Y. Karpenko and Mikhail V. Tsyganko

*E-mail: anatoly.kasatkin@gmail.com

The thallium analogue of galkhaite

Cubic: I4-3m; structure determined

a = 10.2956(6) Å

4.198(79), 2.970(100), 2.749(66), 2.572(22),

2.017(20), 1.879(18), 1.818(49), 1.550(31)

Type material is deposited in the collections of

the Fersman Mineralogical Museum of the

Russian Academy of Sciences, Moscow,

Russia, registration number 4917/1

How to cite: Kasatkin, A.V., Nestola, F.,

Agakhanov, A.A., Škoda, R., Karpenko, V.Y.

and Tsyganko, M.V. (2016) Vorontsovite, IMA

2016-076. CNMNC Newsletter No. 34,

December 2016, page 1319; Mineralogical

Magazine, 80, 1315–1321.

IMA No. 2016-077

Jaszczakite

[Bi3S3][AuS2]

Alsó-Rózsa adit, Nagybörzsöny, Börzsöny Mts,

Pest Co., Hungary (47°56′N, 18°50′E)

Luca Bindi* and Werner H. Paar

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

The S and Bi analogue of buckhornite

Orthorhombic: Pmmn; structure determined

a = 3.858(1), b = 12.552(3), c = 9.289(2) Å

7.467(100), 6.276(90), 5.200(24), 3.096(68),

2.777(26), 2.092(22), 1.929(20), 1.733(18)

Type material is deposited in the mineralogical

collections of the Museo di Storia Naturale,

Università di Firenze, Via La Pira 4, I-50121,

Firenze, Italy, catalogue number 3237/I

How to cite: Bindi, L. and Paar, W.H. (2016)

Jaszczakite, IMA 2016-077. CNMNC

Newsletter No. 34, December 2016, page 1319;

Mineralogical Magazine, 80, 1315–1321.

IMA No. 2016-078

Magnesiohatertite

(Na,Ca)2Ca(Mg,Fe3+)2(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*, Inna S. Lykova, Natalia

N. Koshlyakova, Dmitry I. Belakovskiy,

Marina F. Vigasina, Atali A. Agakhanov,

Sergey N. Britvin, Anna G. Turchkova,

Evgeny G. Sidorov and Gerald Giester

*E-mail: igorpekov@mail.ru

Alluaudite group

Monoclinic: C2/c; structure determined

a = 12.310(1), b = 13.002(1), c = 6.7211(5) Å,

β = 113.823(4)°

6.50(35), 5.66(26), 3.635(41), 3.221(55), 3.086

(27), 2.837(100), 2.792(57), 2.648(42)

Type material is deposited in the collections of

the Fersman Mineralogical Museum, Russian

Academy of Sciences, Moscow, Russia, registration

number 4912/1

How to cite: Pekov, I.V., Lykova, I.S.,

Koshlyakova, N.N., Belakovskiy, D.I., Vigasina,

M.F.,Agakhanov,A.A., Britvin, S.N., Turchkova,

A.G., Sidorov, E.G. and Giester, G. (2016)

Magnesiohatertite, IMA 2016-078. CNMNC

Newsletter No. 34, December 2016, page 1319;

Mineralogical Magazine, 80, 1315–1321.

IMA No. 2016-079

Burroite

Ca2(NH4)2(V10O28)·15H2O

Burro mine, Slick Rock district, San Miguel

Co., Colorado,USA (38°2′42″N, 108°53′23″W)

Anthony R. Kampf*, Barbara P. Nash, Joe

Marty and John M. Hughes

*E-mail: akampf@nhm.org

Chemically related to wernerbaurite

Triclinic: P-1; structure determined

a = 8.779(2), b = 10.311(2), c = 12.060(2) Å, α

= 96.740(4), β = 107.388(5), γ = 114.439(6)°

11.06(100), 9.02(46), 8.10(21), 7.71(94), 7.50

(17), 2.950(14), 2.778(16), 2.075(19)

Type material is deposited in the mineralogical

collections of the Natural History Museum of

Los Angeles County, Los Angeles, California,

USA, catalogue numbers 66299 (holotype) and

66300 (cotype)

How to cite: Kampf, A.R., Nash, B.P., Marty,

J. and Hughes, J.M. (2016) Burroite, IMA

2016-079. CNMNC Newsletter No. 34,

December 2016, page 1319; Mineralogical

Magazine, 80, 1315–1321.

IMA No. 2016-080

Marathonite

Pd25Ge9

Marathon deposit, Coldwell Complex, Ontario,

Canada (48°48′7″N, 86°18′35″W)

Andrew M. McDonald*, Doreen E. Ames, Kirk

C. Ross, Ingrid M. Kjarsgaard and David

J. Good

*E-mail: amcdonald@laurentian.ca

New structure type

Trigonal: P3; structure determined

a = 7.391(1), c = 10.477(2) Å

2.748(10), 2.436(10), 2.374(29), 2.148(100),

1.759(10), 1.360(13), 1.239(14), 1.207(10)

Type material is deposited in the mineralogical

collections of the Canadian Museum of Nature,

Gatineau, Quebec, Canada, catalogue number

CMNMC 87179

How to cite: McDonald, A.M., Ames, D.E.,

Ross, K.C., Kjarsgaard, I.M. and Good, D.J.

(2016) Marathonite, IMA 2016-080. CNMNC

Newsletter No. 34, December 2016, page 1320;

Mineralogical Magazine, 80, 1315–1321.

IMA No. 2016-081

Rietveldite

Fe(UO2)(SO4)2(H2O)5

Giveaway-Simplot mine, White Canyon

mining district, San Juan Co., Utah, USA (37°

33′09.80″N, 110°16′58.50″W); Jáchymov ore

district, Western Bohemia, Czech Republic;

Willi Agatz mine (+50 m level), Gittersee

mining field, Dresden, Saxony, Germany

Anthony R. Kampf*, Jiří Sejkora, Thomas

Witzke, Jakub Plášil, Jiří Čejka, Barbara

P. Nash and Joe Marty

*E-mail: akampf@nhm.org

Structurally related to svornostite

Orthorhombic: Pmn21; structure determined

a = 12.9577(9), b = 8.3183(3), c = 11.2971(5) Å

8.309(34), 6.477(100), 5.110(58), 4.668(48),

4.653(36), 3.428(41), 3.341(33), 3.238(49)

Cope 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 66291 and 66292 (sample

from USA), the TU Bergakademie Freiberg,

Germany, catalogue number 84140 (sample

from Germany), the National Museum Prague,

Department of Mineralogy and Petrology,

Cirkusová 1740, CZ 193 00 Prague, Czech

Republic, catalogue number P1N 45564

(sample from Czech Republic)

How to cite: Kampf, A.R., Sejkora, J., Witzke,

T., Plášil, J., Čejka, J., Nash, B.P. and Marty,

J. (2016) Rietveldite, IMA 2016-081. CNMNC

Newsletter No. 34, December 2016, page 1320;

Mineralogical Magazine, 80, 1315–1321.

IMA No. 2016-082

Redcanyonite

(NH4)2Mn[(UO2)4O4(SO4)2](H2O)4

Blue Lizard mine, Red Canyon, White Canyon

mining district, San Juan Co., Utah, USA (37°

33′26″N, 110°17′44″W)

Travis A. Olds*, Jakub Plášil, Anthony

R. Kampf, Peter C. Burns, Barbara P. Nash,

Joe Marty, Timothy P. Rose and Shawn

M. Carlson

*E-mail: tolds@nd.edu

Structurally related to zippeite

Monoclinic: C2/m; structure determined

a = 8.657(2), b = 14.155(3), c = 8.843(2) Å, β = 104.12(2)°

8.55(21), 7.19(100), 3.600(33), 3.453(56),

3.112(72), 2.657(23), 2.491(21), 2.069(20)

Cotype material is deposited in the mineralogical

collections of the Natural History

Museum of Los Angeles County, Los

Angeles, California, USA, catalogue numbers

66293, 66294, 66295, 66296, 66297 and 66298

How to cite: Olds, T.A., Plášil, J., Kampf, A.R.,

Burns, P.C., Nash, B.P., Marty, J., Rose, T.P. and

Carlson, S.M. (2016) Redcanyonite, IMA

2016-082. CNMNC Newsletter No. 34,

December 2016, page 1320; Mineralogical

Magazine, 80, 1315–1321.

NOMENCLATURE PROPOSAL APPROVED IN OCTOBER 2016

IMA 16-J: Uklonskovite

Proposal 16-J is accepted, and the formula of uklonskovite is revised from NaMg(SO4)OH·2H2O to NaMg(SO4)F·2H2O (F instead of OH).

IMA 16-K: Tombarthite-(Y) (discredited)

Proposal 16-K is accepted, and tombarthite- (Y), ideally Y4(Si,H4)4O12−x(OH)4+2x with x ≤ 4, is discredited. A re-examination of

original material shows that all samples are heterogeneous, and hence not constituted by a single mineral.

IMA 16-L: Claraite

Proposal 16-L is accepted, and claraite is redefined as a copper hydrated hydroxy-

carbonate-arsenate-sulfate mineral having ideal chemical composition (Cu,Zn)15(CO3)4(AsO4)2(SO4)(OH)14·7H2O.

The collection of new chemical and crystallographic data on two

specimens of claraite from the type locality and Carrara confirmed the occurrence of As and S as essential components.

1st Dec 2016 14:25 UTCMarco E. Ciriotti Manager

Formula of alpeite is: Ca4Mn3+2Al2(Mn3+Mg)(SiO4)2(Si3O10)(V5+O4)(OH)6

4th Dec 2016 13:08 UTCŁukasz Kruszewski Expert

Thanks, Marco. All minerals are now on site. Very interesting is the find of marathonite - the first germanide mineral. Also, redcanyonite is the first NH4-Mn-U mineral to date. :)-D

4th Dec 2016 14:20 UTCChris Stefano Expert

Congratulations to John Jaszczak!

4th Dec 2016 17:51 UTCŁukasz Kruszewski Expert

:)-D

6th Dec 2016 16:48 UTCMarco E. Ciriotti Manager

Congrats John!

9th Dec 2016 07:48 UTCKnut Edvard Larsen 🌟 Manager

Is Davidsmithite the same as what has earlier been refered to as "a new K-poor, Ca-rich nepheline-structure mineral" (Smith et al. 1986) see also UM1986-//-SiO:AlCa ?

Smith et al 1986: http://www.minsocam.org/ammin/AM71/AM71_1372.pdf

9th Dec 2016 14:29 UTCMarco E. Ciriotti Manager

Yes Knut. The same.

10th Dec 2016 08:50 UTCKnut Edvard Larsen 🌟 Manager

Thanks Marco !

Pages updated.

9th Jan 2017 23:05 UTCChristof Schäfer Manager

what makes the difference between

Calciojohillerite - Johillerite with end member compositions Na Ca Mg3 (AsO4)3 / Na Cu Mg3 (AsO4)3

and

Nickenichite ~ Na Ca0.5Cu0.5 Mg3 (AsO4)3

10th Jan 2017 09:20 UTCErik Vercammen Expert

I don't know, but nickenichite may be an ordered structure (and do they have the same crystal class?)

10th Jan 2017 10:07 UTCChristof Schäfer Manager

Referring to mindat:

same space group and similar cell parameters

10th Jan 2017 18:06 UTCUwe Kolitsch Manager

There could still be some differences in the crystal structures. You will probably have to wait until the description of calciojohillerite is published.

11th Jan 2017 07:51 UTCMarco E. Ciriotti Manager

They differ from one another in species-defining constituents at positions belonging to the A1 group.

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