1 New mineral proposals approved in April 2021IMA 2020-097 LiguowuiteWO
3Nanyang Village, Huaping County, Yunnan Province, Panzhihua-Xichang region, China (26∘46′18.21′′ N, 101∘27′13.86′′ E)
Yuan Xue, Ningyue Sun, Hongping He, Aiqing Chen, and Yiping Yang
Synthetische Nachbildung bekannt; Struktur ermittelt
Monoklin
P21/n
a=7.3258(2), b=7.5477(2), c=7.7113(2) Å, β=90.678(3)∘
3.855(88), 3.768(88), 3.659(100), 3.104(20), 2.693(43), 2.626(60), 1.827(32), 1.645(27)
Type material is deposited in the mineralogical collections of the Geological Museum of China, Xisi, Yangrou Hutong No. 15, Beijing 100083, People's Republic of China, catalogue number M16121 (holotype), and the Crystal Structure Laboratory, China University of Geosciences, Beijing 100083, People's Republic of China, catalogue number NY-5-3Z (cotype)
Xue, Y., Sun, N., He, H., Chen, A., and Yang, Y.: Liguowuite, IMA 2020-097, in: CNMNC Newsletter 61, Eur. J. Mineral., 33,
https://doi.org/10.5194/ejm-33-299-2021, 2021.
IMA 2020-098 TamuraiteIr
5Fe
10S
16Sisim Placer Zone, river Sisim basin, southern portion of Krasnoyarskiy Kray, central Siberia, not far from Krasnoyarsk, southwestern Eastern Sayans, Russia
Andrei Y. Barkov, Nadezhda D. Tolstykh, and Robert F. Martin
Das Fe-dominant Analog von kuvaevite
Trigonal
R3¯m
a=7.073(1), c=34.277(8) Å
5.774(45), 3.053(43), 3.011(100), 2.996(50), 2.799(55), 2.495(38), 1.770(71), 1.758(65)
Type material is deposited in the mineralogical collections of the Central Siberian Geological Museum, Sobolev Institute of Geology and Mineralogy, Akademik Koptyug Avenue no. 3, 630090 Novosibirsk, Russia, catalogue number III-102/2
Barkov, A. Y., Tolstykh, N. D., and Martin, R. F.: Tamuraite, IMA 2020-098, in: CNMNC Newsletter 61, Eur. J. Mineral., 33,
https://doi.org/10.5194/ejm-33-299-2021, 2021.
IMA 2020-099 GarpenbergiteMn
6AsSbO
10(OH)
2Garpenberg, Hedemora, Dalarna County, Sweden
Dan Holtstam, Luca Bindi, Hans-Jürgen Förster, Andreas Karlsson, and Kjell Gatedal
Das Mn-deficient Analog von manganostibite; Struktur ermittelt
Orthorhombisch
Ibmm
a=8.6790(9), b=18.906(2), c=6.1066(6) Å
5.00(25), 4.42(30), 3.48(20), 3.050(30), 2.665(100), 2.616(40), 2.586(25), 1.545(45)
Type material is deposited in the mineralogical collections of the Department of Geosciences, Swedish Museum of Natural History, Box 50007, 10405 Stockholm, Sweden, collection number GEO-NRM #20010351 and #20200040
Holtstam, D., Bindi, L., Förster, H.-J., Karlsson, A., and Gatedal, K.: Garpenbergite, IMA 2020-099, in: CNMNC Newsletter 61, Eur. J. Mineral., 33,
https://doi.org/10.5194/ejm-33-299-2021, 2021.
IMA 2020-100 ParatobermoriteCa
4(Al
0.5Si
0.5)
2Si
4O
16(OH)(H
2O)
2·(Ca·3H
2O)
Southern open pit, Bazhenovskoe deposit, Asbest, Sverdlovsk Oblast, Central Urals, Russia
Igor V. Pekov, Natalia V. Zubkova, Nikita V. Chukanov, Stefano Merlino, Vasiliy O. Yapaskurt, Dmitry I. Belakovskiy, Alexander B. Loskutov, Elena A. Novgorodova, Svetlana A. Vozchikova, Sergey N. Britvin, and Dmitry Y. Pushcharovsky
Tobermorite-Supergruppe; Struktur ermittelt
Monoklin
C1121/m
a=11.2220(4), b=7.3777(2), c=22.9425(8) Å, γ=89.990(3)∘
11.52(100), 5.46(24), 3.562(17), 3.088(51), 2.982(50), 2.838(20), 2.013(14), 1.848(22)
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 5643/1
Pekov, I. V., Zubkova, N. V., Chukanov, N. V., Merlino, S., Yapaskurt, V. O., Belakovskiy, D. I., Loskutov, A. B., Novgorodova, E. A., Vozchikova, S. A., Britvin, S. N., and Pushcharovsky, D. Y.: Paratobermorite, IMA 2020-100, in: CNMNC Newsletter 61, Eur. J. Mineral., 33,
https://doi.org/10.5194/ejm-33-299-2021, 2021.
IMA 2020-102 Relianceite-(K)K
4Mg(V
4+O)
2(C
2O
4)(PO
3OH)
4(H
2O)
10125-foot (38.1 m) level of the Rowley mine, ca. 20 km northwest of Theba, Maricopa Co., Arizona, USA (33∘02′57′′ N, 113∘01′59′′ W)
Anthony R. Kampf, Mark A. Cooper, Aaron J. Celestian, Chi Ma, and Joe Marty
Neuer Strukturtyp; Struktur ermittelt
Monoklin
Pc
a=12.404(7), b=9.014(6), c=13.260(8) Å, β=100.80(1)∘
12.22(100), 6.56(21), 6.28(20), 3.435(19), 3.125(23), 3.039(19), 2.893(22), 2.718(21)
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 75275
Kampf, A. R., Cooper, M. A., Celestian, A. J., Ma, C., and Marty, J.: Relianceite-(K), IMA 2020-102, in: CNMNC Newsletter 61, Eur. J. Mineral., 33,
https://doi.org/10.5194/ejm-33-299-2021, 2021.
IMA 2020-103 Dendoraite-(NH4)(NH
4)
2NaAl(C
2O
4)(PO
3OH)
2(H
2O)
2125-foot (38.1 m) level of the Rowley mine, ca. 20 km northwest of Theba, Maricopa Co., Arizona, USA (33∘02′57′′ N, 113∘01′59′′ W)
Anthony R. Kampf, Mark A. Cooper, Aaron J. Celestian, Chi Ma, and Joe Marty
Neuer Strukturtyp; Struktur ermittelt
Monoklin
P21/n
a=10.695(6), b=6.285(4), c=19.227(12) Å, β=90.93(1)∘
9.65(100), 9.29(54), 5.99(24), 4.738(28), 3.455(40), 3.106(75), 2.975(28), 2.828(33)
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 75275
Kampf, A. R., Cooper, M. A., Celestian, A. J., Ma, C., and Marty, J.: Dendoraite-(NH4), IMA 2020-103, in: CNMNC Newsletter 61, Eur. J. Mineral., 33,
https://doi.org/10.5194/ejm-33-299-2021, 2021.
IMA 2020-104 StibiogoldfielditeCu
6Cu
6(Sb
2Te
2)S
13Mohawk mine, Goldfield mining district, Esmeralda Co., Nevada, USA (37∘43′01′′ N, 117∘13′25′′ W)
Cristian Biagioni, Jiri Sejkora, Silvia Musetti, Emil Makovicky, Renato Pagano, Marco Pasero, and Zdeněk Dolníček
Tetrahedrite-Gruppe; Struktur ermittelt
Kubisch
I4¯3m
a=10.347(2) Å
3.644(19), 2.974(100), 2.754(8), 2.576(19), 2.429(7), 2.020(10), 1.821(32), 1.553(13)
Type material is deposited in the mineralogical collections of the Museo di Storia Naturale, Università di Pisa, Via Roma 79, Calci (PI), Italy, catalogue number 19926 (holotype), and the Department of Mineralogy and Petrology, National Museum in Prague, Cirkusová 1740, 19300 Prague 9, Czech Republic, catalogue numbers P1P 78/2020 (holotype) and P1P 80/2020 (cotype)
Biagioni, C., Sejkora, J., Musetti, S., Makovicky, E., Pagano, R., Pasero, M., and Dolníček, Z.: Stibiogoldfieldite, IMA 2020-104, in: CNMNC Newsletter 61, Eur. J. Mineral., 33,
https://doi.org/10.5194/ejm-33-299-2021, 2021.
IMA 2021-001 Hydroxylbastnäsite-(La)La(CO
3)(OH)
Vuoriyarvi alkaline-ultrabasic complex, Murmansk Oblast, North Karelia (near the border with Kola Peninsula), Russia (holotype); Mochalin Log REE deposit, 14 km north of Kyshtym, Chelyabinsk Oblast, South Urals, Russia (55∘48′42′′ N, 60∘33′46′′ E – cotype)
Igor V. Pekov, Natalia V. Zubkova, Anatoly V. Kasatkin, Nikita V. Chukanov, Natalia N. Koshlyakova, Dmitry A. Ksenofontov, Radek Škoda, Sergey N. Britvin, Anatoly S. Kirillov, Anatoly N. Zaitsev, Aleksey M. Kuznetsov, and Dmitry Y. Pushcharovsky
Bastnäsite-Gruppe; Struktur ermittelt
Hexagonal
P6¯
a=12.537(3), c=9.968(2) Å
4.98(39), 3.616(88), 2.926(100), 2.089(41), 2.052(46), 1.927(40), 1.701(24), 1.319(20)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration numbers 5644/1 (holotype) and 5660/1 (cotype)
Pekov, I. V., Zubkova, N. V., Kasatkin, A. V., Chukanov, N. V., Koshlyakova, N. N., Ksenofontov, D. A., Škoda, R., Britvin, S. N., Kirillov, A. S., Zaitsev, A. N., Kuznetsov, A. M., and Pushcharovsky, D. Y.: Hydroxylbastnäsite-(La), IMA 2021-001, in: CNMNC Newsletter 61, Eur. J. Mineral., 33,
https://doi.org/10.5194/ejm-33-299-2021, 2021.
IMA 2019-107c WenjiiteTi
10SixPy x>y, 6≤(x+y)≤7
Cr-11 orebody, Luobusa ophiolite, about 200 km east-southeast of Lhasa, Kangjinla District, Tibet, China (29∘11′ N, 92∘18′ E; 5300 m a.s.l.)
Fahui Xiong, Xiangzhen Xu, Enrico Mugnaioli, Mauro Gemmi, Richard Wirth, Jingsui Yang, and Edward S. Grew
Isostrukturell mit mavlyanovite und xifengite; Struktur ermittelt
Hexagonal
P63/mcm
a=7.3(1), c=5.1(1) Å
2.54(11), 2.39(31), 2.36(17), 2.16 (100), 2.11(39), 2.09(80), 1.48(17), 1.38(19)
Type material is deposited in the mineralogical collections of the Geological Museum of China, No. 16 Yangrou Hutong, Xisi, Beijing 100031, People's Republic of China, catalogue number M16104
Xiong, F., Xu, X., Mugnaioli, E., Gemmi, M., Wirth, R., Yang, Y., and Grew, E. S.: Wenjiite, IMA 2019-107c, in: CNMNC Newsletter 61, Eur. J. Mineral., 33,
https://doi.org/10.5194/ejm-33-299-2021, 2021.
IMA 2019-112b KangjinlaiteTi
11Si
10Cr-11 orebody, Luobusa ophiolite, about 200 km east-southeast of Lhasa, Kangjinla District, Tibet, China (29∘11′ N, 92∘18′ E; 5300 m a.s.l.)
Fahui Xiong, Xiangzhen Xu, Enrico Mugnaioli, Mauro Gemmi, Richard Wirth, Edward S. Grew, and Jingsui Yang
Isostrukturell mit synthetic Ho11Ge10; Struktur ermittelt
Tetragonal
I4/mmm
a=9.4(2), c=13.5(3) Å
2.36(34), 2.28(87), 2.27(100), 2.24(35), 2.23(68), 2.12(22), 2.05(37), 1.58(17)
Type material is deposited in the mineralogical collections of the Geological Museum of China, No. 16 Yangrou Hutong, Xisi, Beijing 100031, People's Republic of China, catalogue number M16104
Xiong, F., Xu, X., Mugnaioli, E., Gemmi, M., Wirth, R., Grew, E. S., and Yang, Y.: Kangjinlaite, IMA 2019-112b, in: CNMNC Newsletter 61, Eur. J. Mineral., 33,
https://doi.org/10.5194/ejm-33-299-2021, 2021.
IMA 2020-095a BeershevaiteCaFe
3+3(PO4)3O
In paralavas of the Halamish Wadi, Hatrurim basin, southern Negev Desert, Israel (31∘09′47′′ N, 35∘17′57′′ E)
*E-mail: sbritvin@gmail.com
Known synthetic analogue
Monoclinic: P21/m; structure determined
a=7.498(5), b=6.356(4), c=10.128(7) Å, β=99.88(1)∘
10.08(39), 4.52(100), 3.85(72), 3.696(98), 3.182(95), 2.947(91), 2.865(48), 2.756(42)
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 5628/1
2 New mineral proposals approved in May 2021IMA 2021-003 KarlditmariteCu
9O
4(PO
4)
2(SO
4)
2Arsenatnaya fumarole, second scoria cone of the Northern Breakthrough of the Great Tolbachik fissure eruption, Tolbachik volcano, Kamchatka, Far Eastern Region, Russia (55∘41′ N, 160∘14′ E; 1200 m a.s.l.)
Oleg I. Siidra, Evgeny V. Nazarchuk, Leonid A. Pautov, Artem S. Borisov, and Evgeniya Y. Avdontseva
Neuer Strukturtyp; Struktur ermittelt
Triklin
P1¯
a=6.1256(7), b=7.9192(8), c=7.9866(8) Å, α=75.173(2), β=86.639(2), γ=88.660(2)∘
7.72(100), 6.28(37), 4.769(25), 4.262(31), 3.750(22), 3.310(26), 3.283(31), 3.199(18)
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 5589/1
Siidra, O. I., Nazarchuk, E. V., Pautov, L. A., Borisov, A. S., and Avdontseva, E. Y.: Karlditmarite, IMA 2021-003, in: CNMNC Newsletter 61, Eur. J. Mineral., 33,
https://doi.org/10.5194/ejm-33-299-2021, 2021.
IMA 2021-005 MilkovoiteCu
4O(PO
4)(AsO
4)
Arsenatnaya fumarole, second scoria cone of the Northern Breakthrough of the Great Tolbachik fissure eruption, Tolbachik volcano, Kamchatka, Far Eastern Region, Russia (55∘41′ N, 160∘14′ E; 1200 m a.s.l.)
Oleg I. Siidra, Evgeny V. Nazarchuk, Leonid A. Pautov, Artem S. Borisov, and Michael S. Kozin
Das P-As Analog von kozyrevskite; Struktur ermittelt
Orthorhombisch
Pnma
a=8.1865(7), b=6.3559(5), c=13.668(1) Å
3.413(100), 3.156(48), 3.043(82), 2.897(31), 2.868(42), 2.709(80), 2.684(42), 1.859(35)
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 5590/1
Siidra, O. I., Nazarchuk, E. V., Pautov, L. A., Borisov, A. S., and Kozin, M. S.: Milkovoite, IMA 2021-005, in: CNMNC Newsletter 61, Eur. J. Mineral., 33,
https://doi.org/10.5194/ejm-33-299-2021, 2021.
IMA 2021-007 SteudeliteNa
3(K
17Ca
7)Ca
4(Al
24Si
24O
96)(SO
3)
6F
6·4H
2O
Biachella Valley, Sacrofano Caldera, Sacrofano (RM), Latium, Italy
Nikita V. Chukanov, Natalia V. Zubkova, Dmitry A. Varlamov, Igor V. Pekov, Dmitry I. Belakovskiy, Sergey N. Britvin, Konstantin V. Van, Vera N. Ermolaeva, Svetlana A. Vozchikova, and Dmitry Y. Pushcharovsky
Cancrinite-Gruppe; Struktur ermittelt
Hexagonal
P6¯2c
a=12.8953(1), c=21.2778(3) Å
11.15(28), 4.799(25), 3.973(16), 3.721(47), 3.305(100), 2.661(17), 2.471(14), 2.149(21)
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 5665/1
Chukanov, N. V., Zubkova, N. V., Varlamov, D. A., Pekov, I. V., Belakovskiy, D. I., Britvin, S. N., Van, K. V., Ermolaeva, V. N., Vozchikova, S. A., and Pushcharovsky, D. Y.: Steudelite, IMA 2021-007, in: CNMNC Newsletter 61, Eur. J. Mineral., 33,
https://doi.org/10.5194/ejm-33-299-2021, 2021.
IMA 2021-010 OberwolfachiteSrFe
3+3(AsO
4)(SO
4)(OH)
6Clara mine, Oberwolfach baryte mining area, Wolfach, Schwarzwald (Black Forest), Baden-Württemberg, Germany (48∘22′46′′ N, 8∘13′44′′ E)
Nikita V. Chukanov, Natalia V. Zubkova, Gerhard Möhn, Dmitry A. Varlamov, Igor V. Pekov, Dmitry A. Ksenofontov, Atali A. Agakhanov, Sergey N. Britvin, Natalia N. Koshlyakova, Joy Desor, Vera N. Ermolaeva, and Dmitry Y. Pushcharovsky
Alunite-Supergruppe
Trigonal
R3¯m
; structure determined
a=7.3270(3), c=17.0931(9) Å
5.95(56), 3.664(37), 3.117(16), 3.082(100), 2.548(15), 2.280(22), 1.983(26), 1.832(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 5674/1
IMA 2021-011 RyabchikoviteCuMgSi
2O
6Arsenatnaya fumarole, second scoria cone of the Northern Breakthrough of the Great Tolbachik fissure eruption, Tolbachik volcano, Kamchatka, Far Eastern Region, Russia (55∘41′ N, 160∘14′ E; 1200 m a.s.l.)
Nadezhda V. Shchipalkina, Oleg S. Vereshchagin, Igor V. Pekov, Dmitry I. Belakovskiy, Natalia N. Koshlyakova, Vladimir V. Shilovskikh, Dmitriy V. Pankin, Sergey N. Britvin, Fedor D. Sandalov, and Evgeny G. Sidorov
Pyroxene-Gruppe
Monoklin
P21/c
a=9.731(9), b=8.929(8), c=5.221(4) Å, β=110.00(6)∘
4.403(38), 4.307(27), 3.746(32), 3.291(27), 3.177(100), 2.876(75), 2.456(26), 2.215(26)
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 5642/1
Shchipalkina, N. V., Vereshchagin, O. S., Pekov, I. V., Belakovskiy, D. I., Koshlyakova, N. N., Shilovskikh, V. V., Pankin, D. V., Britvin, S. N., Sandalov, F. D., and Sidorov, E. G.: Ryabchikovite, IMA 2021-011, in: CNMNC Newsletter 61, Eur. J. Mineral., 33,
https://doi.org/10.5194/ejm-33-299-2021, 2021.
IMA 2021-014 LisaniteCaNiP
2O
7Halamish Wadi (Nahal Halamish), Hatrurim basin, Negev Desert, Israel (31∘09′47′′ N, 35∘17′57′′ E)
Sergey N. Britvin, Michail N. Murashko, Yevgeny Vapnik, Natalia S. Vlasenko, Oleg S. Vereshchagin, and Vladimir N. Bocharov
Das Ni Analog von anastasenkoite; Struktur ermittelt
Triklin
P1¯
a=6.474(2), b=6.526(2), c=6.519(2) Å, α=66.57(3), β=82.77(2), γ=87.35(2)∘
4.389(13), 3.214(21), 3.029(51), 2.994(45), 2.970(17), 2.835(100), 2.718(8), 1.772(10)
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 5629/1
Britvin, S. N., Murashko, M. N., Vapnik, Y., Vlasenko, N. S., Vereshchagin, O. S., and Bocharov, V. N.: Lisanite, IMA 2021-014, in: CNMNC Newsletter 61, Eur. J. Mineral., 33,
https://doi.org/10.5194/ejm-33-299-2021, 2021.
IMA 2021-016 ErssoniteCaMg
7Fe
3+2(OH)
18(SO
4)
2·12H
2O
Långban mine, Filipstad district, Värmland county, Sweden (59∘51′19′′ N, 14∘15′53′′ E)
Elena S. Zhitova, Nikita V. Chukanov, Erik Jonsson, Igor V. Pekov, Dmitry I. Belakovsky, Marina F. Vigasina, Natalia V. Zubkova, Konstantin V. Van, and Sergey N. Britvin
Hydrotalcite-Supergruppe; Struktur ermittelt
Trigonal
P3¯c1
a=9.3550(5), c=22.546(1) Å
11.22(90), 5.63(64), 4.670(100), 3.756(35), 2.626(64), 2.435(66), 2.193(40), 1.951(45)
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 5669/1, and the Swedish Museum of Natural History (Naturhistoriska Riksmuseet), P.O. Box 50007, 104 05 Stockholm, Sweden, catalogue number GEO-NRM #20210001
Zhitova, E. S., Chukanov, N. V., Jonsson, E., Pekov, I. V., Belakovsky, D. I., Vigasina, M. F., Zubkova, N. V., Van, K. V., and Britvin, S. N.: Erssonite, IMA 2021-016, in: CNMNC Newsletter 61, Eur. J. Mineral., 33,
https://doi.org/10.5194/ejm-33-299-2021, 2021.
3 Confirmation of siderazot as a valid speciesIn the IMA List of Minerals siderazot is tagged as Q (i.e. questionable), for the reason that no data on that mineral have been published since the original description (Ann. Phys. Chem., 157, 165–172, 1876). Recently a detailed study on holotype siderazot, which is preserved in the Natural History Museum, London (UK), was carried out (Minerals, 11, art. 290, 2021). New chemical (EMPA) and structural (Rietveld) data were obtained. Moreover Raman and reflectance data are given. The complete set of data indicate that siderazot possesses the ε-Fe3N-type structure. In the light of these new data the status of siderazot can be changed from Q to Rd (i.e. redefined). The chemical formula of siderazot is slightly modified from FeNx (with x ≈0.25–0.5) to Fe3N1.33.
4 Nomenclature/classification proposals approved in May 20214.1 IMA 21-A: discreditation of the mineral name hartite and reinstatement of the name branchite
Proposal 21-A is accepted, and the mineral name hartite is discredited and replaced by the name branchite, which has historical priority.
4.2 IMA 21-B: redefinition of gunterite
Proposal 21-B is accepted, and the ideal formula of gunterite is revised from Na4(H2O)16(H2V10O28)•6H2O to Na4Ca[V10O28]•20H2O, based on new structural data and electron-probe microanalyses.
4.3 IMA 21-C: redefinition of jixianite as hydroplumboelsmoreite
Proposal 21-C is accepted, and the questionable species jixianite is renamed hydroplumboelsmoreite. The mineral hydroplumboelsmoreite belongs to the pyrochlore supergroup and has the simplified formula (Pb,)2(W,Fe3+)2O6(H2O). More specifically it belongs to the elsmoreite group (W6+ dominant at the B site), with Pb dominant at the A site and H2O dominant at the anionic Y site.
4.4 Mineral symbols
The proposal to establish mineral symbols has been approved. All existing mineral species have been assigned a symbol. The list of current mineral symbols will be available and kept up to date on the CNMNC website. Mineral symbols will now be required in all new mineral proposals.