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 X-ray powder 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 DECEMBER 2018
IMA No. 2018-109
Avdeevite
(Na,Cs)(Be2Li)Al2(Si6O18)
Khat Chey (Kat Chay) mine, near the Khetchel village, Molo quarter, Momeik township, Kyaukme district, Shan State, Myanmar (23°18'42”N , 96°51'54”E)
Atali A. Agakhanov*, Dmitry A. Stepanenko, Natalia V. Zubkova, Igor V. Pekov, Leonid A. Pautov, Anatoly V. Kasatkin, Vladimir Y. Karpenko, Vitaliya A. Agakhanova, Radek Škoda and Sergey N. Britvin
*E-mail: [email protected]
Beryl group
Hexagonal: P6/mmc; structure determined
a = 9.2287(4), c = 9.2610(3) Å
7.96(82), 4.60(31), 3.99(20), 3.26(100), 3.02(37), 2.866(84), 2.524(13), 1.742(19)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5279/1
How to cite: Agakhanov, A.A., Stepanenko, D.A., Zubkova, N.V., Pekov, I.V., Pautov, L.A., Kasatkin, A.V., Karpenko, V.Y., Agakhanova, V.A., Škoda, R. and Britvin, S.N. (2019) Avdeevite, IMA 2018-109. CNMNC Newsletter No. 47, February 2019, page 143; Mineralogical Magazine, 83, 143–147.
IMA No. 2018-110
Nickeltyrrellite
CuNi2Se4
El Dragón mine, 30 km SW of Potosí, Quijarro province, Bolivia (19°49'23.90”S, 65°55'00.60”W, 4160 m a.s.l.)
Hans-Jürgen Förster*, Chi Ma, Günter Grundmann, Luca Bindi and Christopher J. Stanley
*E-mail: [email protected]
Spinel supergroup
Cubic: Fd 
$\overline 3 $m
a = 9.99 Å
X-ray powder diffraction pattern not available
Type material is deposited in the mineralogical collections of the Natural History Museum, London, catalogue number BM2018,19 (holotype), and the Mineralogical State Collection Munich − Museum Reich der Kristalle, inventory number MSM 73587 (cotype)
How to cite: Förster, H.-J., Ma, C., Grundmann, G., Bindi, L. and Stanley C.J. (2019) Nickeltyrrellite, IMA 2018-110. CNMNC Newsletter No. 47, February 2019, page 143; Mineralogical Magazine, 83, 143–147.
IMA No. 2018-114
Pseudomarkeyite
Ca8(UO2)4(CO3)12·21H2O
Markey mine, Red Canyon, White Canyon District, San Juan Co., Utah, USA (37°32'57”N, 110°18'08”W)
Anthony R. Kampf*, Travis A. Olds, Jakub Plášil, Peter C. Burns and Joe Marty
*E-mail: [email protected]
Closely related to markeyite
Monoclinic: P21/m; structure determined
a = 17.531(3), b = 18.555(3), c = 9.130(3) Å, β = 103.95(3)°
8.73(86), 6.28(100), 5.70(72), 4.65(80), 4.293(55), 4.082(47), 3.973(25), 2.811(59)
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 67091
How to cite: Kampf, A.R., Olds, T.A., Plášil, J., Burns, P.C. and Marty, J. (2019) Pseudomarkeyite, IMA 2018-114. CNMNC Newsletter No. 47, February 2019, page 144; Mineralogical Magazine, 83, 143–147.
IMA No. 2018-115
Magnesiobermanite
MgMn3+2(PO4)2(OH)2·4H2O
White Rock No. 2 quarry, Bimbowrie Conservation Park, 24 km N of Olary, South Australia, Australia (32°4'51”S, 140°19'45”E)
Peter Elliott*
*E-mail: [email protected]
The Mg analogue of bermanite
Monoclinic: P21; structure determined
a = 5.421(1), b = 19.072(4), c = 5.389(1) Å, β = 110.21(3)°
9.533(100), 5.089(8), 4.878(3), 4.772(21), 3.634(3), 3.246(3), 3.046(2), 2.892(6)
Type material is deposited in the mineralogical collections of the South Australian Museum, North Terrace, Adelaide, South Australia, Australia, registration number G34762
How to cite: Elliott, P. (2019) Magnesiobermanite, IMA 2018-115. CNMNC Newsletter No. 47, February 2019, page 144; Mineralogical Magazine, 83, 143–147.
IMA No. 2018-116
Perbøeite-(La)
(CaLa3)(Al3Fe2+)[Si2O7][SiO4]3O(OH)2
Mochalin Log REE deposit, 14 km N of the city of Kyshtym, Chelyabinsk Oblast’, South Urals, Russia (55°48'42”N, 60°33'46”E)
Anatoly V. Kasatkin*, Igor V. Pekov, Natalia V. Zubkova, Nikita V. Chukanov, Radek Škoda, Yury S. Polekhovsky, Dmitriy I. Belakovskiy, Atali A. Agakhanov, Aleksey M. Kuznetsov and Dmitry Y. Pushcharovsky
*E-mail: [email protected]
Gatelite supergroup
Monoclinic: P21/m; structure determined
a = 8.9652(4), b = 5.7306(2), c = 17.6770(9) Å, β = 116.053(6)°
15.85(83), 8.03(41), 4.665(68), 3.523(99), 3.116(56), 3.009(100), 2.874(55), 2.640(54)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5253/1
How to cite: Kasatkin, A.V., Pekov, I.V., Zubkova, N.V., Chukanov, N.V., Škoda, R., Polekhovsky, Y.S., Belakovskiy, D.I., Agakhanov, A.A., Kuznetsov, A.M. and Pushcharovsky, D.Y. (2019) Perbøeite-(La), IMA 2018-116. CNMNC Newsletter No. 47, February 2019, page 144; Mineralogical Magazine, 83, 143–147.
IMA No. 2018-043
Nikmelnikovite
Ca12Fe2+Fe3+3Al3(SiO4)6(OH)20
Kovdor massif, Kola peninsula, Murmansk Region, Russia (67°35'21”N, 30°27'33”E)
Sergey V. Krivovichev*, Victor N. Yakovenchuk, Taras L. Panikorovskii, Eugeny E. Savchenko, Yakov A. Pakhomovsky, Julia A. Mikhailova, Ekaterina A. Selivanova, Galijabanu I. Kadyrova and Gregory Y. Ivanyuk
*E-mail: [email protected]
Garnet supergroup
Trigonal: R 
$\overline 3 $; structure determined
a = 17.2072(6), c = 10.5689(4) Å
8.57(65), 3.042(58), 2.720(100), 2.483(27), 2.223(28), 1.975(30), 1.687(31), 1.626(32)
Type material is deposited in the collections of the Mineralogical Museum, St. Petersburg State University, Russia, catalogue No. 1/19691
How to cite: Krivovichev, S.V., Yakovenchuk, V.N., Panikorovskii, T.L., Savchenko, E.E., Pakhomovsky, Y.A., Mikhailova, J.A., Selivanova, E.A., Kadyrova, G.I. and Ivanyuk, G.Y. (2019) Nikmelnikovite, IMA 2018-043. CNMNC Newsletter No. 47, February 2019, page 144; Mineralogical Magazine, 83, 143–147.
IMA No. 2018-103
Carmeltazite
ZrAl2Ti4O11
In pockets of trapped melt interstitial to, or included in, corundum crystals, Mt. Carmel volcanics, Israel
William L. Griffin, Sarah E.M. Gain, Luca Bindi*, Verez Toledo, Fernando Cámara, Martin Saunders and Suzanne Y. O'Reilly
*E-mail: [email protected]
New structure type
Orthorhombic: Pnma; structure determined
a = 14.0951(9), b = 5.8123(4), c = 10.0848(7) Å
5.04(65), 4.09(60), 2.961(100), 2.885(40), 2.732(30), 2.051(25), 2.047(60), 1.456(30)
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 3293/I
How to cite: Griffin, W.L., Gain, S.E.M., Bindi, L., Toledo, V., Cámara, F., Saunders, M. and O'Reilly, S.Y. (2019) Carmeltazite, IMA 2018-103. CNMNC Newsletter No. 47, February 2019, page 144; Mineralogical Magazine, 83, 143–147.
NEW MINERAL PROPOSALS APPROVED IN JANUARY 2019
IMA No. 2018-111
Llantenesite
Cu6Al[SeO4](OH)12Cl·3H2O
Mina San Pedro, Cuesta de Los Llantenes mining district, NW Jagüé, Vinchina Department, La Rioja Province, Argentina (28°20-40'S, 68°30-45'W)
Christian L. Lengauer*, Martin Ende, Dan Topa, Raúl Lira and Werner H. Paar
*E-mail: [email protected]
The Se analogue of spangolite
Trigonal: P31c; structure determined
a = 8.2603(3), c = 14.5953(4) Å
7.297(100), 3.650(40), 3.254(5), 2.535(6), 2.363(4), 1.984(2), 1.824(3), 1.552(2)
Type material is deposited in the mineralogical collections of the Naturhistorisches Museum Wien, Burgring 7, 1010 Wien, Austria, catalogue No. O574
How to cite: Lengauer, C.L., Ende, M., Topa, D., Lira, R. and Paar, W.H. (2019) Llantenesite, IMA 2018-111. CNMNC Newsletter No. 47, February 2019, page 145; Mineralogical Magazine, 83, 143–147.
IMA No. 2018-113
Donwilhelmsite
CaAl4Si2O11
In the lunar meteorite Oued Awlitis 001, found on January 15, 2014 in the Boujdour Province, Laâyoune-Sakia El Hamra Region, Western Sahara (25.954°N, 12.493°W)
Jörg Fritz*, Ansgar Greshake, Mariana Klementova, Richard Wirth, Lukas Palatinus, Vera Assis Fernandes, Ute Böttger and Ludovic Ferrière
*E-mail: [email protected]
Structurally related to zagamiite
Hexagonal: P63/mmc; structure determined
a = 5.44(1), c = 12.76(3) Å
X-ray powder diffraction pattern not available
Type material is deposited in the mineralogical collections of the Naturhistorisches Museum Wien, Burgring 7, 1010 Wien, Austria, catalogue no. NHMW-O104
How to cite: Fritz, J., Greshake, A., Klementova, M., Wirth, R., Palatinus, L., Assis Fernandes, V., Böttger, U. and Ferrière, L. (2019) Donwilhelmsite, IMA 2018-113. CNMNC Newsletter No. 47, February 2019, page 145; Mineralogical Magazine, 83, 143–147.
IMA No. 2018-119
Glikinite
Zn3O(SO4)2
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)
Evgeniy V. Nazarchuk, Oleg I. Siidra*, Diana O. Nekrasova, Artem S. Borisov and Vladimir V. Shilovskikh
*E-mail: [email protected]
Known synthetic analogue
Monoclinic: P21/m; structure determined
a = 7.30(2), b = 6.59(1), c = 7.84(1) Å, β = 117.14(3)°
6.968(56), 3.942(52), 3.483(100), 3.294(49), 2.936(43), 2.533(63), 2.507(63), 2.394(86)
Type material is deposited in the collections of the Mineralogical Museum, Department of Mineralogy, St Petersburg State University, St Petersburg, Russia, specimen number 1/19695
How to cite: Nazarchuk, E.V., Siidra, O.I., Nekrasova, D.O., Borisov, A.S. and Shilovskikh, V.V. (2019) Glikinite, IMA 2018-119. CNMNC Newsletter No. 47, February 2019, page 145; Mineralogical Magazine, 83, 143–147.
IMA No. 2018-120
Šlikite
Zn2Mg(CO3)2(OH)2·4H2O
Vladimír mine (II. level), Plavno, Jáchymov ore district, Western Bohemia, Czech Republic
Jiří Sejkora*, Ian E. Grey, Anthony R. Kampf, W. Gus Mumme, Bohuslav Bureš and Jiří Čejka
*E-mail: [email protected]
New structure type
Triclinic: P 
$\overline 1 $; structure determined
a = 6.335(4), b = 6.340(1), c = 13.923(4) Å, α = 99.985(7), β = 92.74(1), γ = 114.93(2)°
13.57(100), 4.525(31), 3.573(2), 3.406(5), 3.394(5), 3.326(1), 2.996(3), 2.773(3)
Type material is deposited in the mineralogical collection of the National Museum, Prague, Czech Republic, catalogue number P1P 46/2018, and the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue number 67057
How to cite: Sejkora, J., Grey, I.E., Kampf, A.R., Mumme, W.G., Bureš, B. and Čejka, J. (2019) Šlikite, IMA 2018-120. CNMNC Newsletter No. 47, February 2019, page 145; Mineralogical Magazine, 83, 143–147.
IMA No. 2018-124
Orthocuproplatinum
Pt3Cu
Lubero region, Democratic Republic of the Congo
Alexandre Raphael Cabral*, Roman Skála, Anna Vymazalová, Jaroslav Maixner, Chris J. Stanley, Bernd Lehmann and Jacques Jedwab
*E-mail: [email protected]
Known synthetic analogue
Orthorhombic: Cmmm; structure determined
a = 7.681(1), b = 5.4318(8), c = 2.7502(4) Å
2.337(11), 2.236(100), 2.217(97), 1.932(61), 1.920(30), 1.362(36), 1.169(24), 1.161(23)
Type material is deposited in the mineralogical collection of “Geosammlung”, Technische Universität Clausthal, Adolph-Roemer-Strasse 2A, D-38678 Clausthal-Zellerfeld, Germany, catalogue number 11331
How to cite: Cabral, A.R., Skála, R., Vymazalová, A., Maixner, J., Stanley, C.J., Lehmann, B. and Jedwab, J. (2019) Orthocuproplatinum, IMA 2018-124. CNMNC Newsletter No. 47, February 2019, page 145; Mineralogical Magazine, 83, 143–147.
IMA No. 2018-126
Nickolayite
FeMoP
Daba-Siwaqa complex, Transjordan Plateau, Hatrurim Formation, Jordan (31°21'52”N, 36°10'55”E)
Mikhail N. Murashko, Yevgeny Vapnik, Yury S. Polekhovsky, Vladimir V. Shilovskikh, Anatoly N. Zaitsev, Oleg S. Vereshchagin and Sergey N. Britvin*
*E-mail: [email protected]
New structure type
Orthorhombic: Pnma; structure determined
a = 5.9519(5), b = 3.7070(3), c = 6.8465(6) Å
3.238(21), 2.298(100), 2.226(9), 2.181(89), 2.113(26), 1.927(14), 1.838(18), 1.388(13)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5290/1
How to cite: Murashko, M.N., Vapnik, Y., Polekhovsky, Y.P., Shilovskikh, V.V., Zaitsev, A.M., Vereshchagin, O.S. and Britvin, S.N. (2019) Nickolayite, IMA 2018-126. CNMNC Newsletter No. 47, February 2019, page 146; Mineralogical Magazine, 83, 143–147.
IMA No. 2018-128
Reaphookhillite
MgZn2(PO4)2·4H2O
Reaphook Hill, Martins Well, Flinders Ranges, South Australia, Australia (31°23'39”S, 139°17'54”E)
Peter Elliott*
*E-mail: [email protected]
The Mg analogue of parahopeite
Triclinic: P 
$\overline 1 $; structure determined
a = 5.759(1), b = 7.534(1), c = 5.279(1) Å, α = 93.44(3), β = 91.27(3), γ = 91.30(3)°
7.577(100), 4.461(24), 3.771(14), 3.158(13), 2.982(32), 2.880(27), 2.775(14), 2.668(13)
Type material is deposited in the mineralogical collection of the South Australian Museum, North Terrace, Adelaide, South Australia, Australia, registration number G34798
How to cite: Elliott, P. (2019) Reaphookhillite, IMA 2018-128. CNMNC Newsletter No. 47, February 2019, page 146; Mineralogical Magazine, 83, 143–147.
IMA No. 2018-129
Davidbrownite-(NH4)
(NH4)5(V4+O)2(C2O4)[PO2.75(OH)1.25]4·3H2O
Rowley mine (125-foot level), ca. 20 km NW of Theba, Maricopa Co., Arizona, USA (33°2'57”N, 113°1'59”W)
Anthony R. Kampf*, Mark A. Cooper, George R. Rossman, Barbara P. Nash, Frank C. Hawthorne and Joe Marty
*E-mail: [email protected]
New structure type
Monoclinic: P21/c; structure determined
a = 10.356(6), b = 8.923(5), c = 13.486(7) Å, β = 92.618(9)°
10.39(100), 6.73(50), 5.97(34), 3.789(35), 3.160(47), 3.104(42), 3.043(35), 2.977(44)
Cotype 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 66951, 66955 and 66959
How to cite: Kampf, A.R., Cooper, M.A., Rossman, G.R., Nash, B.P., Hawthorne, F.C. and Marty, J. (2019) Davidbrownite, IMA 2018-129. CNMNC Newsletter No. 47, February 2019, page 146; Mineralogical Magazine, 83, 143–147.
IMA No. 2018-006a
Ognitite
NiBiTe
Ognit (or Medek) dunite-wehrlite complex, southern margin of the Siberian Craton, Irkutskaya oblast, Eastern Sayans, Russia
Andrei Y. Barkov*, Luca Bindi, Björn Winkler, Wolfgang Morgenroth, Gennadiy I. Shvedov, Robert F. Martin, Federica Zaccarini, Camelia V. Stan, Nobumichi Tamura and Christopher J. Stanley
*E-mail: [email protected]
Structurally related to melonite
Trigonal: P3m1; structure determined
a = 3.9332(4), c = 5.3920(6) Å
5.39(10), 3.39(15), 2.880(100), 2.697(10), 2.110(30), 1.968(30), 1.625(15), 1.589(20)
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 3292/I
How to cite: Barkov, A.Y., Bindi, L., Winkler, B., Morgenroth, W., Shvedov, G.I., Martin, R.F., Zaccarini, F., Stan, C.V., Tamura, N. and Stanley, C.J. (2019) Ognitite, IMA 2018-006a. CNMNC Newsletter No. 47, February 2019, page 146; Mineralogical Magazine, 83, 143–147.
IMA No. 2018-051a
CaZn2(AsO4)2·4H2O
Plaka Mine No. 80, Lavrion District Mines, Attikí Prefecture, Greece (37°45'18”N, 24°1'54”E)
Branko Rieck*, Gerald Giester, Christian Lengauer and Dan Topa
*E-mail: [email protected]
Structurally related to phosphophyllite
Monoclinic: Pc; structure determined
a = 9.4160(3), b = 5.3000(2), c = 10.8931(4) Å, β = 91.767(1)°
9.406(100), 4.619(80), 3.612(35), 3.494(35), 2.984(60), 2.922(50), 2.720(20), 2.647(25)
Type material is deposited in the mineralogical collections of the Natural History Museum-Vienna, Burgring 7, 1010 Vienna, Austria, inventory number O342
How to cite: Rieck, B., Giester, G., Lengauer, C. and Topa, D. (2019) IMA 2018-051a. CNMNC Newsletter No. 47, February 2019, page 146; Mineralogical Magazine, 83, 143–147.
IMA No. 2018-055a
Bouškaite
(MoO2)2O(SO3OH)2(H2O)4
On the mine dump of the shaft Lill (total depth 454.4 m), close to Příbram, central Bohemia, Czech Republic (49°41'49”N, 14°0'1”E)
Jiri Sejkora*, Ian E. Grey, Anthony R. Kampf, Jakub Plášil and Pavel Škácha
*E-mail: [email protected]
New structure type
Triclinic: P 
$\overline 1 $; structure determined
a = 5.581(3), b = 9.572(1), c = 14.425(4) Å, α = 97.43(1), β = 100.05(2), γ = 89.96(1)°
14.15(35), 7.078(100), 5.483(6), 5.440(9), 4.838(7), 4.720(56), 4.010(7), 3.240(10)
Type material is deposited in the collections of the Department of Mineralogy and Petrology, National Museum Prague, Cirkusová 1740, CZ-193 00 Praha 9, Czech Republic, catalogue number P1P 24/2018 (holotype), and the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue number 66776 (cotype)
How to cite: Sejkora, J., Grey, I.E., Kampf, A.R., Plášil, J. and Škácha, P. (2019) Bouškaite, IMA 2018-055a. CNMNC Newsletter No. 47, February 2019, page 147; Mineralogical Magazine, 83, 143–147.
IMA No. 2018-063a
Kenngottite
Mn2+3Fe3+4(PO4)4(OH)6(H2O)2
Stannum mine, 5th level of the Huber shaft, Krásno ore district, near Horní Slavkov, western Bohemia, Czech Republic (50°07'22”N, 12°48'2”E)
Jiří Sejkora*, Ian E. Grey and Anthony R. Kampf
*E-mail: [email protected]
Structurally related to souzalite and gormanite
Monoclinic: P2/a; structure determined
a = 13.909(10), b = 5.186(4), c = 12.159(9) Å, β = 98.88(1)°
4.87(47), 3.458(89), 3.209(100), 3.023(31), 2.623(46), 2.429(49), 1.951(28), 1.577(34)
Type material is deposited in the collections of the Department of Mineralogy and Petrology, National Museum Prague, Cirkusová 1740, CZ-193 00 Praha 9, Czech Republic, catalogue number P1P 26/2018 (holotype), and the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue number 66795 (cotype)
How to cite: Sejkora, J., Grey, J.E. and Kampf, A.R. (2019) Kenngottite, IMA 2018-063a. CNMNC Newsletter No. 47, February 2019, page 147; Mineralogical Magazine, 83, 143–147.
IMA No. 2018-086a
Edscottite
Fe5C2
Wedderburn meteorite, found 4.5 km NE of Wedderburn, Victoria, Australia (36°26'S, 143°38'E)
Chi Ma and Alan Rubin
*E-mail: [email protected]
Known synthetic analogue
Monoclinic: C2/c
a = 11.57, b = 4.57, c = 5.06 Å, β = 97.7°
2.207(31), 2.192(26), 2.079(68), 2.050(100), 2.027(27), 2.010(36), 1.921(26), 1.816(22)
Type material is deposited in the meteorite collections of the Department of Earth, Planetary and Space Sciences, University of California, Los Angeles, California 90095-1567, USA, polished thick section ULCA 143
How to cite: Ma, C. and Rubin, A. (2019) Edscottite, IMA 2018-086a. CNMNC Newsletter No. 47, February 2019, page 147; Mineralogical Magazine, 83, 143–147.
REVISED CHEMICAL FORMULAE
A paper on the mineral satimolite has been recently published [Mineralogical Magazine, 82 (2018), 1033–1047] in which the ideal chemical formula of the mineral is given as KNa2(Al5Mg2)[B12O18(OH)12](OH)6Cl4·4H2O, with magnesium as an essential constituent. These data were examined carefully by the CNMNC officers and were considered reliable. Accordingly it was agreed to modify the formula of satimolite in the official IMA List of Minerals.
