IMA no. 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

• ^* E-mail: atali99@mail.ru

• Isostructural with vladykinite

• Monoclinic: P2₁/c; structure determined

• 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

• How to cite: 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 no. 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

• ^* E-mail: zhuzeying_nju@163.com

• Columbite supergroup

• Orthorhombic: 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

• How to cite: 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 no. 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

• ^* E-mail: rafal.juroszek@us.edu.pl

• Known synthetic analogue

• Tetragonal: I4/mmm; structure determined

• 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

• How to cite: 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 no. 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

• ^* E-mail: evgeny.galuskin@us.edu.pl

• Known synthetic analogue

• Monoclinic: P2₁/c; structure determined

• 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

• How to cite: 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 no. 2023-104

• Pabellóndepicaite

• Cu${}_{\mathrm{2}}^{\mathrm{2}+}$(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

• ^* E-mail: akampf@nhm.org

• Related to bojarite, chanabayaite, and triazolite, all containing the 1,2,4-triazole ring

• Orthorhombic: Pnna; structure determined

• 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

• How to cite: 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 no. 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

• ^* E-mail: enrico.mugnaioli@unipi.it

• Isostructural with wodegongjieite and kokchetavite

• Hexagonal: P6/mmc; structure determined

• 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.

• How to cite: 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 no. 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

• ^* E-mail: nkoshlyakova@gmail.com

• New structure type

• Monoclinic: P2₁/n; structure determined

• 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

• How to cite: 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 no. 2023-107

• Rinmanite-(Zn)

• Zn₂Sb₂(Fe${}_{\mathrm{4}}^{\mathrm{3}+}$Zn₂)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

• ^* E-mail: nikchukanov@yandex.ru

• The Zn analogue of rinmanite

• Hexagonal: P6₃mc; structure determined

• 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

• How to cite: 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 no. 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

• ^* E-mail: evgeny.galuskin@us.edu.pl

• New structure type

• Trigonal: $P\stackrel{\mathrm{‾}}{\mathrm{3}}$1m; structure determined

• 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

• How to cite: 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 no. 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

• ^* E-mail: irina.galuskina@us.edu.pl

• Garnet supergroup

• Cubic: Ia$\stackrel{\mathrm{‾}}{\mathrm{3}}d$; structure determined

• 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

• How to cite: 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 no. 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

• ^* E-mail: fabrizio.nestola@unipd.it

• Tourmaline supergroup

• Trigonal: $R\stackrel{\mathrm{‾}}{\mathrm{3}}m$; structure determined

• 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

• How to cite: 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.

IMA no. 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

• ^* E-mail: hamane@issp.u-tokyo.ac.jp

• Spinel supergroup

• Cubic: Fd$\stackrel{\mathrm{‾}}{\mathrm{3}}m$

• 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

• How to cite: 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 no. 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

• ^* E-mail: hyang@arizona.edu

• New structure type

• Triclinic: $P\stackrel{\mathrm{‾}}{\mathrm{1}}$; structure determined

• 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)

• How to cite: 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 no. 2023-113

• Nigelcookite

• PbFe${}_{\mathrm{2}}^{\mathrm{2}+}$V${}_{\mathrm{2}}^{\mathrm{3}+}$(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

• ^* E-mail: pengliu@nwu.edu.cn

• Bjarebyite group

• Monoclinic: P2₁/m; structure determined

• 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

• How to cite: 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 no. 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

• ^* E-mail: pieczka@agh.edu.pl

• Epidote supergroup

• Monoclinic: P2₁/m; structure determined

• 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

• How to cite: 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 no. 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

• ^* E-mail: ian.grey@csiro.au

• The fluorine analogue of rewitzerite

• Monoclinic: P2₁/c; structure determined

• 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)

• How to cite: 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 no. 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

• ^* E-mail: akampf@nhm.org

• New structure type

• Monoclinic: P2₁/n; structure determined

• 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

• How to cite: 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 no. 2023-119

• Plumbojohntomaite

• PbFe${}_{\mathrm{2}}^{\mathrm{2}+}$Fe${}_{\mathrm{2}}^{\mathrm{3}+}$(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

• ^* E-mail: pengliu@nwu.edu.cn

• Bjarebyite group

• Monoclinic: P2₁/m; structure determined

• 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

• How to cite: 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 no. 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

• ^* E-mail: ian.grey@csiro.au

• Closely related to rewitzerite

• Monoclinic: P2₁/c; structure determined

• 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)

• How to cite: 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 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 ($M_x^{\mathrm{3}+}{M}_{\mathrm{2}-x}^{\mathrm{2}+}$)(CO₃)₂[(OH)_x ⋅ (2-x)H₂O]. The supergroup is divided into the ancylite group ($\mathrm{1}\le x\le \mathrm{1.5}$), 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)).

4.1 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.

4.2 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 [Sc_0.96Ca_0.79Mn${}_{\mathrm{0.18}}^{\mathrm{2}+}$Fe${}_{\mathrm{0.04}}^{\mathrm{2}+}$Y_0.03]_Σ=3.00 at the A site and [Be_2.91Al_0.09]_Σ=2.00 at the T2 site (The Canadian Mineralogist, 44, 943–949, 2006). This is an executive decision taken by the CNMNC officers.