Mineralien / Minerals / Minerales > Systematik und Klassifikation / Systematics and Classification
Neue Mineralien CNMNC Newsletter 78 (Feb. 2024, März 2024)
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Stefan:
Neue Mineralien im Februar
IMA 2023-043
Rundqvistite-(Ce)
Na3(Sr3Ce)[Zn2Si8O24]
Run-Ce
Dara-i-Pioz alkaline massif, upper reaches of the Dara-i-Pioz River, Tajikistan (39°30′ N, 70°40′ E)
Atali A. Agakhanov, Maxwell C. Day, Elena Sokolova, Vladimir Y. Karpenko, Frank C. Hawthorne, Leonid A. Pautov, Anatoly V. Kasatkin, Igor V. Pekov, and Vitaliya A. Agakhanova
Isostrukturell mit vladykinite; Struktur ermittelt
Monoklin
P21/c
a=5.1934(1), b=7.893(1), c=26.011(5) Å, β=90.02(3)°
4.28(50), 3.616(33), 3.598(60), 3.336(42), 3.140(46), 2.952(100), 2.830(80), 2.821(60)
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 5999/1
Agakhanov, A. A., Day, M. C., Sokolova, E., Karpenko, V. Y., Hawthorne, F. C., Pautov, L. A., Kasatkin, A. V., Pekov, I. V., and Agakhanova, V. A.: Rundqvistite-(Ce), IMA 2023-043, in: CNMNC Newsletter 78, Eur. J. Mineral., 36, https://doi.org/10.5194/ejm-36-361-2024, 2024.
IMA 2023-058
Tantalaeschynite-(Ce)
Ce(TiTa)O6
Taes-Ce
Huangshan pegmatite dike, about 35 km northeast of Hengfeng County, southeast Jiangxi Province, China (28°36′02′′ N, 117°41′49′′ E)
Zeying Zhu, Hong Yu, Zhenyu Chen, Bin Wu, Rucheng Wang, Yike Li, and Denghong Wang
Columbite-Supergruppe
Orthorhombisch
Pnma
a=10.9694(3), b=7.5519(2), c=5.4217(1) Å
3.104(24), 3.025(76), 2.970(100), 2.691(26), 2.033(15), 1.882(18), 1.711(19), 1.598(22),
Type material is deposited in the collections of the Geological Museum of China, No. 16, Yangrou Hutong, Xisi, Beijing 100031, People's Republic of China, catalogue number M16122
Zhu, Z., Yu, H., Chen, Z., Wu, B., Wang, R., Li, Y., and Wang, D.: Tantalaeschynite-(Ce), IMA 2023-058, in: CNMNC Newsletter 78, Eur. J. Mineral., 36, https://doi.org/10.5194/ejm-36-361-2024, 2024.
IMA 2023-102
Karlleuite
Ca2MnO4
Kll
Caspar quarry, Bellerberg volcano, Eifel, Germany (50°21′06′′ N, 7°14′02′′ E)
Rafał Juroszek, Biljana Krüger, Georgia Cametti, Bernd Ternes, and Günter Blaß
Synthetische Nachbildung bekannt; Struktur ermittelt
Tetragonal
I4/mmm
a=3.7683(2), c=11.9893(8) Å
5.995(43), 2.742(100), 2.665(91), 2.023(25), 1.998(28), 1.884(61), 1.553(38), 1.371(24)
Type material is deposited in the collections of the Natural History Museum Mainz/State Collection for Natural History Rhineland-Palatinate, Reichklarastrasse 10, 55116 Mainz, Germany, catalogue number NHMMZ M 2023/2-LS
Juroszek, R., Krüger, B., Cametti, G., Ternes, B., and Blaß, G.: Karlleuite, IMA 2023-102, in: CNMNC Newsletter 78, Eur. J. Mineral., 36, https://doi.org/10.5194/ejm-36-361-2024, 2024.
IMA 2023-103
Yamhamelachite
KCrP2O7
Ymm
Hatrurim Complex, at the roadside Arad – Dead Sea, wadi Zohar, Negev desert, Israel (31°11′25′′ N, 35°17′00′′ E)
Evgeny V. Galuskin, Joachim Kusz, Irina O. Galuskina, Yevgeny Vapnik, and Grzegorz Zieliński
Synthetische Nachbildung bekannt; Struktur ermittelt
Monoklin
P21/c
a=7.3574(3), b=9.9336(4), c=8.1540(4) Å, β=106.712(5)°
5.747(96), 5.255(23), 3.905(82), 3.380(33), 2.997(68), 2.956(28), 2.929(100), 2.926(61)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 115162, Russia, registration number 6074/1
Galuskin, E. V., Kusz, J., Galuskina, I. O., Vapnik, Y., and Zieliński, G.: Yamhamelachite, IMA 2023-103, in: CNMNC Newsletter 78, Eur. J. Mineral., 36, https://doi.org/10.5194/ejm-36-361-2024, 2024.
IMA 2023-104
Pabellóndepicaite
Cu2+2(N3C2H2)2(NH3)2(NO3)Cl⋅2H2O
Pdp
In a guano deposit at Pabellón de Pica, 1.5 km south of the village of Chanabaya, Iquique Province, Tarapacá Region, Chile (20°54′32′′ S, 70°08′17′′ W)
Anthony R. Kampf, Gerhard Möhn, Chi Ma, and Joy Désor
Related to bojarite, chanabayaite, und triazolite, all containing the 1,2,4-triazole ring; Struktur ermittelt
Orthorhombisch
Pnna
a=7.212(1), b=9.098(1), c=11.128(3) Å
11.182(39), 7.057(100), 6.039(30), 4.753(48), 4.564(28), 3.350(50), 2.511(47), 2.273(38)
Type material is deposited in the collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue number 76305
Kampf, A. R., Möhn, G., Ma, C., and Désor, J.: Pabellóndepicaite, IMA 2023-104, in: CNMNC Newsletter 78, Eur. J. Mineral., 36, https://doi.org/10.5194/ejm-36-361-2024, 2024.
IMA 2023-105
Pfaffenbergite
KNa3(Al4Si12)O32
Pfg
Pfaffenberg, in the town of Waldheim, Saxony, Germany (51°04′07′′ N, 13°00′55′′ E)
Silvio Ferrero, Sofia Lorenzon, Roberto Borriello, Enrico Mugnaioli, Alessia Borghini, Rico Fuchs, Richard Wirth, Anja Schreiber, and Edward S. Grew
Isostrukturell mit wodegongjieite und kokchetavite; Struktur ermittelt
Hexagonal
P6/mmc
a=10.258(3), c=14.775(5) Å
4.442(100), 3.807(53), 3.694(75), 3.274(43), 2.840(72), 2.564(56), 2.127(17), 1.847(14)
Type material is deposited in the collections of the Museum of Mineralogy “Leonard De Prunner”, University of Cagliari, Via Trentino, 51, 09127 Cagliari, Italy, FIB foil no. 6461.
Ferrero, S., Lorenzon, S., Borriello, R., Mugnaioli, E., Borghini, A., Fuchs, R., Wirth, R., Schreiber, A., and Grew, E. S.: Pfaffenbergite, IMA 2023-105, in: CNMNC Newsletter 78, Eur. J. Mineral., 36, https://doi.org/10.5194/ejm-36-361-2024, 2024.
IMA 2023-106
Vladkuzminite
K4CuZn3(AsO4)4
Vkz
Arsenatnaya fumarole, Second scoria cone of the Northern Breakthrough of the Great Tolbachik Fissure Eruption, Tolbachik volcano, Kamchatka Peninsula, Far Eastern Federal District, Russia (55°41′ N, 160°14′ E; 1200 m a.s.l.)
Natalia N. Koshlyakova, Igor V. Pekov, Atali A. Agakhanov, Peter C. Burns, Natalia V. Zubkova, Marina F. Vigasina, Sergey N. Britvin, Robert M. Hazen, and Elena S. Zhitova
Neuer Strukturtyp; Struktur ermittelt
Monoklin
P21/n
a=8.5920(7), b=8.9064(5), c=22.309(2) Å, β=90.136(7)°
6.19(63), 4.725(35), 4.302(36), 3.211(100), 3.099(37), 2.786(46), 2.732(38), 2.626(36)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 115162, Russia, registration number 6075/1
Koshlyakova, N. N., Pekov, I. V., Agakhanov, A. A., Burns, P. C., Zubkova, N. V., Vigasina, M. F., Britvin, S. N., Hazen, R. M., and Zhitova, E. S.: Vladkuzminite, IMA 2023-106, in: CNMNC Newsletter 78, Eur. J. Mineral., 36, https://doi.org/10.5194/ejm-36-361-2024, 2024.
IMA 2023-107
Rinmanite-(Zn)
Zn2Sb2(Fe3+4Zn2)O14(OH)2
Rnm-Zn
4.5 km northwest of the village of Nežilovo, and 2 km west-southwest of the city of Veles, North Macedonia (41°41′ N, 21°25′ E)
Nikita V. Chukanov, Vasilisa M. Gridchina, Ramiza K. Rastsvetaeva, Dmitry A. Varlamov, Anatoly V. Kasatkin, Igor V. Pekov, Marina F. Vigasina, Alla A. Virus, Simeon Jančev, and Sergey N. Britvin
Das Zn Analog von rinmanite; Struktur ermittelt
Hexagonal
P63mc
a=5.9720(1), c=9.3578(1) Å
5.176(46), 4.530(42), 3.473(77), 2.989(46), 2.674(86), 2.520(100), 1.658(38), 1.518(33)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 115162, Russia, registration number 6059/1
Chukanov, N. V., Gridchina, V. M., Rastsvetaeva, R. K., Varlamov, D. A., Kasatkin, A. V., Pekov, I. V., Vigasina, M. F., Virus, A. A., Jančev, S., and Britvin, S. N.: Rinmanite-(Zn), IMA 2023-107, in: CNMNC Newsletter 78, Eur. J. Mineral., 36, https://doi.org/10.5194/ejm-36-361-2024, 2024.
IMA 2023-109
Bacaferrite
BaCaFe4O8
Bcf
Hatrurim Complex, Negev desert, near the city of Arad, Israel (31°14′22′′ N, 35°16′55′′ E)
Evgeny V. Galuskin, Yevgeny Vapnik, Maria Książek, Joachim Kusz, Grzegorz Zieliński, and Irina O. Galuskina
Neuer Strukturtyp; Struktur ermittelt
Trigonal
P-31m
a=5.3839(4), c=7.6693(6) Å
7.669(23), 2.962(100), 2.692(77), 2.540(24), 1.992(29), 1.601(13), 1.562(18), 1.554(20)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 115162, Russia, registration number 6086/1
Galuskin, E. V., Vapnik, Y., Książek, M., Kusz, J., Zieliński, G., and Galuskina, I. O.: Bacaferrite, IMA 2023-109, in: CNMNC Newsletter 78, Eur. J. Mineral., 36, https://doi.org/10.5194/ejm-36-361-2024, 2024.
IMA 2023-110
Midbarite
Ca3Mg2(V2Si)O12
Mid
Hatrurim Basin, near Ye'elim Mount, Negev desert, Israel (31°14′21.9′′ N, 35°16′54.8′′ E)
Irina Galuskina, Evgeny Galuskin, Joachim Kusz, Maria Książek, Yevgeny Vapnik, and Beata Marciniak-Maliszewska
Garnet-Supergruppe; Struktur ermittelt
Kubisch
Ia-3d
a=12.3539(4) Å
3.088(46), 2.762(100), 2.633(13), 2.521(45), 2.422(11), 1.713(27), 1.651(48), 1.348(13)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 115162, Russia, registration number 6085/1
Galuskina, I., Galuskin, E., Kusz, J., Książek, M., Vapnik, Y., and Marciniak-Maliszewska, B.: Midbarite, IMA 2023-110, in: CNMNC Newsletter 78, Eur. J. Mineral., 36, https://doi.org/10.5194/ejm-36-361-2024, 2024.
IMA 2023-111
Fluor-rossmanite
□(Al2Li)Al6(Si6O18)(BO3)3(OH)3F
Frsm
Krutaya pegmatite vein, Malkhan pegmatite field, Krasnochikoyskiy District, Zabaykalsky Krai, Western Siberia, Russia (50°39′52′′ N, 109°55′35′′ E)
Anatoly V. Kasatkin, Fabrizio Nestola, Maxwell C. Day, Liudmila A. Gorelova, Radek Škoda, Oleg S. Vereshchagin, Atali A. Agakhanov, and Dmitry I. Belakovskiy
Tourmaline-Supergruppe; Struktur ermittelt
Trigonal
R-3m
a=15.7951(3), c=7.0865(2) Å
4.181(22), 3.941(100), 2.930(39), 2.552(25), 2.017(16), 1.894(15), 1.640(18), 1.580(15)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 115162, Russia, registration number 6049/1
Kasatkin, A. V., Nestola, F., Day, M. C., Gorelova, L. A., Škoda, R., Vereshchagin, O. S., Agakhanov, A. A., and Belakovskiy, D. I.: Fluor-rossmanite, IMA 2023-111, in: CNMNC Newsletter 78, Eur. J. Mineral., 36, https://doi.org/10.5194/ejm-36-361-2024, 2024.
Neue Mineralien im März
IMA 2023-072a
Shiranuiite
Cu+(Rh3+Rh4+)S4
Sir
Haraigawa, Misato-machi, Kumamoto Prefecture, Kyushu, Japan (32°34′50′′ N, 130°47′59′′ E)
Daisuke Nishio-Hamane, Takahiro Tanaka, and Tadashi Shinmachi
Spinel-Supergruppe
Kubisch
Fd-3m
a=9.757(2) Å
2.95(55), 2.44(36), 1.879(61), 1.725(100), 1.487(29), 1.409(18), 1.270(46), 1.220(44)
Type material is deposited in the collections of the National Museum of Nature and Science, Amakubo, Tsukuba, Ibaraki 305-0005, Japan, specimen number NSM-M50086
Nishio-Hamane, D., Tanaka, T., and Shinmachi, T.: Shiranuiite, IMA 2023-072a, in: CNMNC Newsletter 78, Eur. J. Mineral., 36, https://doi.org/10.5194/ejm-36-361-2024, 2024.
IMA 2023-112
Fanguangite
(MoO2)(PO3OH) ⋅ 4H2O
Fgu
Freedom No. 2 mine, about 5.6 km north-northeast of the town of Marysvale, central part of the Marysvale volcanic field, Piute Co., Utah, USA (38°29′43′′ N, 112°12′55′′ W)
Xiangping Gu, Ting Li, Hexiong Yang, Anthony R. Kampf, and Joe Marty
Neuer Strukturtyp; Struktur ermittelt
Triklin
P-1
a=6.3156(4), b=7.7199(9), c=9.456(1) Å, α=75.247(10), β=82.106(8), γ=71.706(8)°
9.153(15), 7.158(100), 5.192(47), 4.557(26), 4.309(33), 3.579(28), 3.500(25), 3.103(40)
Type material is deposited in the collections of the University of Arizona Alfie Norville Gem & Mineral Museum, 115 N Church Ave Ste 121, Tucson, AZ 85701, USA, catalogue no. 22734 (holotype), and the RRUFF Project, deposition no. R220031 (cotype)
Gu, X., Li, T., Yang, H., Kampf, A. R., and Marty, J.: Fanguangite, IMA 2023-112, in: CNMNC Newsletter 78, Eur. J. Mineral., 36, https://doi.org/10.5194/ejm-36-361-2024, 2024.
IMA 2023-113
Nigelcookite
PbFe2+2V3+2(PO4)3(OH)3
Nck
Yushui Cu-polymetallic deposit, about 16 km northeast of the city of Meizhou, Guangdong Province, China (24°25′18′′ N, 116°11′48′′ E)
Wei Yao, Peng Liu, Guowu Li, Ningyue Sun, Wenqiang Yang, Wenlei Song, and Chao Zhang
Bjarebyite-Gruppe; Struktur ermittelt
Monoklin
P21/m
a=9.1159(5), b=12.2328(7), c=5.0092(3) Å, β=100.708(6)°
9.091(73), 6.179(30), 5.079(80), 4.590(33), 3.148(82), 2.892(63), 2.726(100), 2.178(39)
Type material is deposited in the collections of the Geological Museum of China, Yangrou Hutong No. 16, Xisi, Beijing 100031, People's Republic of China, catalogue number GMCTM2023010
Yao, W., Liu, P., Li, G., Sun, N., Yang, W., Song, W., and Zhang, C.: Nigelcookite, IMA 2023-113, in: CNMNC Newsletter 78, Eur. J. Mineral., 36, https://doi.org/10.5194/ejm-36-361-2024, 2024.
IMA 2023-114
Allanite-(Sm)
CaSm(Al2Fe2+)(Si2O7)(SiO4)O(OH)
Aln-Sm
In a serpentinite quarry, about 1 km west of the village of Jordanów Śląski, 30 km south of Wrocław, Lower Silesia, Poland (50°52′16′′ N, 16°50′18′′ E)
Adam Pieczka, Bożena Gołębiowska, Adam Włodek, Marcin Stachowicz, Petras Jokubauskas, Jakub Kotowski, Krzysztof Nejbert, Adam Szuszkiewicz, and Krzysztof Woźniak
Epidote-Supergruppe; Struktur ermittelt
Monoklin
P21/m
a=8.8923(6), b=5.7005(3), c=10.1280(8) Å, β=115.445(9)°
9.146(21), 3.506(47), 2.902(100), 2.850(44), 2.688(36), 2.686(28); 2.606(48), 2.120(23)
Type material is deposited in the collections of the Mineralogical Museum, University of Wrocław, Cybulskiego 30, 50-205 Wrocław, Poland, catalogue number MMUWr IV8151
Pieczka, A., Gołębiowska, B., Włodek, A., Stachowicz, M., Jokubauskas, P., Kotowski, J., Nejbert, K., Szuszkiewicz, A., and Woźniak, K.: Allanite-(Sm), IMA 2023-114, in: CNMNC Newsletter 78, Eur. J. Mineral., 36, https://doi.org/10.5194/ejm-36-361-2024, 2024.
IMA 2023-115
Fluor-rewitzerite
[(H2O)K]Mn2(Al2Ti)(PO4)4(OF)(H2O)10 ⋅ 4H2O
Frwz
Hagendorf Süd pegmatite mine quarry (67 m level), Oberpfalz, northeast Bavaria, Germany (49°39′01′′ N, 12°27′35′′ E)
Ian E. Grey, Rupert Hochleitner, Anthony R. Kampf, Stephanie Boer, Colin M. MacRae, William G. Mumme, and Nicholas C. Wilson
Das fluorine Analog von rewitzerite; Struktur ermittelt
Monoklin
P21/c
a=10.407(1), b=20.514(2), c=12.193(1) Å, β=90.49(2)°
10.256(46), 7.414(62), 6.149(100), 5.190(41), 3.704(64), 3.119(74), 2.866(80), 2.603(45)
Type material is deposited in the collections of the Bavarian State Mineral Collection, Theresienstrasse 41, 80333, Munich, Germany, registration number MSM 80824 (holotype), and the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue number 76305 (cotype)
Grey, I. E., Hochleitner, R., Kampf, A. R., Boer, S., MacRae, C. M., Mumme, W. G., and Wilson, N. C.: Fluor-rewitzerite, IMA 2023-115, in: CNMNC Newsletter 78, Eur. J. Mineral., 36, https://doi.org/10.5194/ejm-36-361-2024, 2024.
IMA 2023-117
Siligiite
[Pb(H2O)5(SO4)][Zn9(OH)18]
Sigi
Redmond mine, Haywood Co., North Carolina, USA (35°40′55′′ N, 83°00′56′′ W)
Anthony R. Kampf, Jason B. Smith, John M. Hughes, Chi Ma, and Christopher Emproto
Neuer Strukturtyp; Struktur ermittelt
Monoklin
P21/n
a=13.658(3), b=9.488(3), c=19.209(4) Å, β=102.577(6)°
9.452(100), 6.751(40), 4.334(43), 3.078(42), 2.635(53), 2.577(61), 2.275(41), 1.575(52)
Cotype material is deposited in the collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue numbers 76308 and 76309
Kampf, A. R., Smith, J. B., Hughes, J. M., Ma, C., and Emproto, C.: Siligiite, IMA 2023-117, in: CNMNC Newsletter 78, Eur. J. Mineral., 36, https://doi.org/10.5194/ejm-36-361-2024, 2024.
IMA 2023-119
Plumbojohntomaite
PbFe2+2Fe3+2(PO4)3(OH)3
Pjtm
Yushui polymetallic deposit, about 16 km northeast of the city of Meizhou, Guangdong Province, China (24°25′18′′ N, 116°11′48′′ E)
Wei Yao, Peng Liu, Guowu Li, Ningyue Sun, Rongxi Li, Wenqiang Yang, Wenlei Song, and Chao Zhang
Bjarebyite-Gruppe; Struktur ermittelt
Monoklin
P21/m
a=9.0999(4), b=12.1911(6), c=5.0176(2) Å, β=100.671(4)°
9.102(80), 3.532(36), 3.156(76), 3.085(44), 2.971(45), 2.878(61), 2.734(100), 2.683(35)
Type material is deposited in the collections of the Geological Museum of China, No. 16, Yangrou Hutong, Xisi, Beijing 100031, People's Republic of China, catalogue number GMCTM2023011
Yao, Y., Liu, P., Li, G., Sun, N., Li, R., Yang, W., Song, W., and Zhang, C.: Plumbojohntomaite, IMA 2023-119, in: CNMNC Newsletter 78, Eur. J. Mineral., 36, https://doi.org/10.5194/ejm-36-361-2024, 2024.
IMA 2023-120
Sperlingite
(H2O)K(Mn2+Fe3+)(Al2Ti)(PO4)4[O(OH)] [(H2O)9(OH)]⋅4H2O
Sper
On the dump of the Hagendorf Süd mine, Oberpfalz, northeast Bavaria, Germany (49°39′01′′ N, 12°27′35′′ E)
Christian Rewitzer, Rupert Hochleitner, Ian E. Grey, Anthony R. Kampf, Stephanie Boer, Colin M. MacRae, William G. Mumme, Nicholas C. Wilson, and Cameron Davidson
Closely related to rewitzerite; Struktur ermittelt
Monoklin
P21/c
a=10.428(2), b=20.281(4), c=12.223(2) Å, β=90.10(3)°
10.236(37), 7.447(52), 6.176(100), 5.191(35), 3.727(41), 3.101(86), 2.979(35), 2.839(43)
Type material is deposited in the collections of the Bavarian State Mineral Collection, Theresienstrasse 41, 80333, Munich, Germany, registration number MSM38185 (holotype), and the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue number 76310 (cotype)
Rewitzer, C., Hochleitner, R., Grey, I. E., Kampf, A. R., Boer, S., MacRae, C. M., Mumme, W. G., Wilson, N. C., and Davidson, C.: Sperlingite, IMA 2023-120, in: CNMNC Newsletter 78, Eur. J. Mineral., 36, https://doi.org/10.5194/ejm-36-361-2024, 2024.
Nomenclature/classification proposals approved in February 2024
Nomenclature of the ancylite supergroup
(Yanjuan Wang, Fabrizio Nestola, Zengqian Hou, Ritsuro Miyawaki, Igor V. Pekov, Xiangping Gu, Guochen Dong, and Kai Qu)
The ancylite supergroup is established. Minerals of the ancylite supergroup have the general crystal chemical formula (M3+xM2-2-x)(CO3)2[(OH)x ⋅ (2-x)H2O]. The supergroup is divided into the ancylite group (1 <=x y=1.5), including eight valid species (ancylite-(La), ancylite-(Ce), calcioancylite-(La), calcioancylite-(Ce), calcioancylite-(Nd), gysinite-(La), gysinite-(Ce), gysinite-(Nd)), and the kozoite group (1.5<x≤2), including two valid species (kozoite-(La), kozoite-(Nd)).
Other issues
Ideal formula for mackinakite
Five years ago, several chemical formulae of minerals were simplified by removing subordinate constituents, specifically minor chemical elements that were listed in parentheses after the dominating, species-defining constituent; more information on the changes to the formulae can be found in CNMNC Newsletter 50 (European Journal of Mineralogy, 31, 847–853, 2019). The recent publication of a paper (American Mineralogist, 109, 401–407, 2024) prompted us to modify the ideal formula of mackinakite. That mineral has been revised from (Fe,Ni)1+xS [x=0–0.07] to FeS as the above paper showed that the composition of mackinawite corresponds to end-member FeS, with Ni, Co, and Cu present as subordinate constituents that are not included in the ideal formula. The formula of mackinakite in the IMA List of Minerals has been updated accordingly. This is an executive decision taken by the CNMNC officers.
Ideal formula for oftedalite
The chemical formula of oftedalite was reported in the 2009 Nickel–Nichols list as KSc2Be3AlSi11O30. Since the SCXRD study indicates that the T1 site is fully occupied by Si and that Al partially substitutes for Be at the T2 site, the formula was given as KSc2(Be,Al)3Si12O30 in the first release (September 2012) of the IMA List of Minerals. In December 2014 the formula of oftedalite was improperly changed to KSc2□2Be3Si12O30, which is not charge balanced. To rectify this error, the formula must be revised to K(ScCa)□2Be3Si12O30. This latter formula better matches the electron microprobe data of oftedalite from the Heftetjern pegmatite, Tørdal, Norway – the only known occurrence – which shows [Sc0.96Ca0.79Mn
FeY0.03]Σ=3.00 at the A site and [Be2.91Al0.09]Σ=2.00 at the T2 site (The Canadian Mineralogist, 44, 943–949, 2006). This is an executive decision taken by the CNMNC officers.
Stefan:
Mackinakite müsste wohl eher Mackinawite heißen.
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