CNMNC Newsletter April - Mai 2022

[Stefan]

1 New mineral proposals approved in April 2022

IMA 2021-087a
Fluorsigaiite
Fsig
Ca₂Sr₃(PO₄)₃F
Saima peralkaline complex, ca. 50 km northeast of Fengcheng City, Liaoning Province, China (40°58′20.6′′ N, 124°16′27.8′′ E)
Bin Wu, Xiang-ping Gu, Can Rao, Ru-cheng Wang, Fu-jun Zhong, and Jian-jun Wan
Apatite-Supergruppe; Struktur ermittelt
Hexagonal
P63/m
a = 9.6101(2), c = 7.1311(1) Å
3.563(15), 3.275(15), 3.144(19), 2.876(100), 2.861(96), 2.772(27), 1.991(16), 1.895(23)
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 M16130
Wu, B., Gu, X., Rao, C., Wang, R., Zhong, F., and Wan, J.: Fluorsigaiite, IMA 2021-087a, in: CNMNC Newsletter 67, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-359-2022, 2022.

IMA 2021-114
Bounahasite
Bnhs
Cu⁺Cu²⁺₂ (OH)₃Cl₂
Bou Nahas Mine (Bou N’hass Mine), Oumjrane mining area, Tinghir Province, Morocco (30°39′53′′ N, 5°06′48′′ W)
Inna Lykova, Ralph Rowe, Glenn Poirier, Henrik Friis, and Kate Helwig
Neuer Strukturtyp; Struktur ermittelt
Monoklin
P21/n
a = 8.5924(1), b = 6.41886(9), c = 10.4118(2) Å, β = 111.804(2)°
7.71(70), 5.34(22), 3.856(100), 2.673(36), 2.665(30), 2.350(71), 2.130(17), 2.062(17)
Type material is deposited in the mineralogical collections of the Canadian Museum of Nature, PO Box 3443, Station “D”, Ottawa, Ontario K1P 6P4, Canada, catalogue number CMNMC 89874
Lykova, I., Rowe, R., Poirier, G., Friis, H., and Helwig, K.: Bounahasite, IMA 2021-114, in: CNMNC Newsletter 67, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-359-2022, 2022.

IMA 2021-115
Haywoodite
Hyw
[Pb(H₂O)₁₀)][Zn₁₂(OH)₂₀(H₂O)(SO₄)₃]
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
Strukturell verwandt mit lahnsteinite, namuwite, und osakaite; Struktur ermittelt
Triklin
P-1
a = 8.3530(2), b = 13.2769(7), c = 18.2744(13) Å, α = 92.427(8), β = 90.419(6), γ = 108.214(4)°
10.62(100), 7.26(45), 6.04(40), 3.306(48), 3.219(53), 2.731(51), 2.652(93), 2.402(37)
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 76205, 76206, and 76207
Kampf, A. R., Smith, J. B., Hughes, J. M., Ma, C., and Emproto, C.: Haywoodite, IMA 2021-115, in: CNMNC Newsletter 67, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-359-2022, 2022.

IMA 2021-116
Sarrochite
Sarr
[Ca₄(H₂O)₃₈][Mo₈P₂Fe³⁺₃O₃₇(OH)]
Su Seinargiu mine, Sarroch, Cagliari, Sardinia, Italy (39°04′53′′ N, 8° 58′36′′ E)
Stuart J. Mills, Anthony R. Kampf, Paolo Orlandi, and Jason R. Price
Strukturell verwandt mit mendozavilite; Struktur ermittelt
Trigonal
P-3m1
a = 10.908(1), c = 28.570(6) Å
13.81(20), 9.13(100), 7.85(13), 6.74(18), 3.640(15), 3.136(13), 3.020(19), 2.868(26)
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 76204
Mills, S. J., Kampf, A. R., Orlandi, P., and Price, J. R.: Sarrochite, IMA 2021-116, in: CNMNC Newsletter 67, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-359-2022, 2022.

IMA 2021-117
Kabalovite
Kbv
Fe²⁺₃Fe³⁺₄(PO₄)₆
Halamish Wadi, Hatrurim basin, south Negev desert, Israel (31°09′47′′ N, 35°17′57′′ E)
Sergey N. Britvin, Mikhail N. Murashko, Maria G. Krzhizhanovskaya, Natalia S. Vlasenko, Oleg S. Vereshchagin, Yevgeny Vapnik, and Evgeny A. Vasiliev
Howardevansite-Gruppe; Struktur ermittelt
Triklin
P-1
a = 6.365(1), b = 7.988(1), c = 9.325(2) Å, α = 105.436(4), β = 108.194(3), γ = 101.515(3)°
4.329(19), 3.115(34), 3.012(26), 2.983(100), 2.952(73), 2.891(19), 2.808(21), 2.530(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 5737/1
Britvin, S. N., Murashko, M. N., Krzhizhanovskaya, M. G., Vlasenko, N. S., Vereshchagin, O. S., Vapnik, Y., and Vasiliev, E. A.: Kabalovite, IMA 2021-117, in: CNMNC Newsletter 67, Eur. J. Mineral., 34,

IMA 2021-119
Argentopolybasite-T2ac
Aplb-T2ac
Ag₁₆Sb₂S₁₁
Kremnica deposit, Žiar nad Hronom Co., Banská Bystrica Region, Slovakia (48∘43′01′′ N, 18∘53′52′′ E – type locality); Šibeničný vrch, near Nová Baňa, Žarnovica Co., Banská Bystrica Region, Slovakia (48∘24′49′′ N, 18∘38′14′′ E – cotype locality); Arykevaam deposit, Anadyr' District, Chukotka Autonomous Okrug, Russia (66∘43′00.8′′ N, 172∘02′13.2′′ E – cotype locality)
Martin Števko, Tomáš Martin Števko, Tomáš Mikuš, Jiří Sejkora, Jakub Plášil, Emil Makovicky, Jozef Vlasáč, and Anatoly Kasatkin
Polybasite-Gruppe; Struktur ermittelt
Trigonal
P321
a = 15.0646(5), c = 12.2552(5) Å
12.169(40), 3.162(100), 3.045(54), 2.881(45), 2.691(23), 2.547(22), 2.426(28), 1.886(22)
Type material is deposited in the collections of the Department of Mineralogy and Petrology, National Museum in Prague, Cirkusová 1740, 19300 Prague 9, Czech Republic, catalogue numbers P1P 59/2021 (holotype) and P1P 60/2021 (cotype from Nová Baňa), and the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5818/1 (cotype from Arykevaam)
Števko, M., Mikuš, T., Sejkora, J., Plášil, J., Makovicky, E., Vlasáč, J., and Kasatkin, A.: Argentopolybasite-T 2ac, IMA 2021-119, in: CNMNC Newsletter 67, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-359-2022, 2022.

IMA 2021-120
Fluorpyromorphite
Fpym
Pb₅(PO₄)₃F
Sukhovyazskoe deposit, southern slope of Sukhovyaz Mt., Ufaley District, ca. 2.5 km SW of the city of Verkhniy Ufaley, Chelyabinsk Oblast, Southern Urals, Russia (56°01′55′′ N, 60°10′57′′ E)
Anatoly V. Kasatkin, Jakub Plášil, Radek Škoda, Nikita V. Chukanov, Fabrizio Nestola, Atali A. Agakhanov, and Aleksey M. Kuznetsov
Apatite-Supergruppe
Hexagonal
P63/m
a = 9.779(5), c = 7.241(9) Å
4.236(25), 3.337(30), 3.189(28), 2.931(100), 2.806(20), 1.943(18), 1.838(49), 1.534(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 number 5819/1
Kasatkin, A. V., Plášil, J., Škoda, R., Chukanov, N. V., Nestola, F., Agakhanov, A. A., and Kuznetsov, A. M.: Fluorpyromorphite, IMA 2021-120, in: CNMNC Newsletter 67, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-359-2022, 2022.

IMA 2022-001
Kenorozhdestvenskayaite-(Fe)
Kroz-Fe
Ag₆(Ag₄Fe₂)Sb₄S₁₂
Yindongpo mine, Weishancheng ore field, Tongbai County, Nanyang, Henan Province, China (32°33′02′′ N, 113°25′25′′ E)
Kai Qu, Weizhi Sun, Xiangpin Gu, Zeqiang Yang, Xianzhang Sima, Chao Tang, Guang Fan, and Yanjuan Wang
Tetrahedrite-Gruppe; Struktur ermittelt
Kubisch
I-43m
a = 10.7119(6) Å
7.574(28), 4.373(9), 3.092(100), 2.678(43), 2.525(12), 2.101(12), 1.894(27), 1.615(15)
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 M16132
Qu, K., Sun, W., Gu, X., Yang, Z., Sima, X., Tang, C., Fan, G., and Wang, Y.: Kenorozhdestvenskayaite-(Fe), IMA 2022-001, in: CNMNC Newsletter 67, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-359-2022, 2022.

IMA 2022-002
Oxyyttrobetafite-(Y)
Oyb-Y
Y₂Ti₂O₆O
Souri Valley, Komono, Mie Prefecture, Japan (35°00′35′′ N, 136°27′33′′ E)
Daisuke Nishio-Hamane, Koichi Momma, Masayuki Ohnishi, and Sachio Inaba
Pyrochlore-Supergruppe; Struktur ermittelt
Kubisch
Fd-3m
a = 10.121(3) Å
2.918(100), 2.527(18), 2.321(13), 1.788(53), 1.525(46), 1.162(13), 1.132(8), 1.033(9)
362 R. Miyawaki et al.: CNMNC Newsletter 67
Type material is deposited in the mineralogical collections of the National Museum of Nature and Science, 4-1-1 Amakubo, Tsukuba, Ibaraki 305-0005, Japan, specimen number NSM-M49380

IMA 2022-003
Loomisite
Lmi
Ba[Be₂P₂O₈]·H₂O
Big Chief mine, near Keystone, Pennington Co., South Dakota, USA (43°51′54′′ N, 103°22′54′′ W)
Hexiong Yang, Xiangping Gu, Ronald B. Gibbs, and Michael M. Scott
Chemically related to minjiangite; Struktur ermittelt
Monoklin
Pn
a = 7.629(2), b = 9.429(2), c = 4.762(1) Å, β = 91.272(5)°
4.259(39), 3.813(29), 3.068(44), 2.897(100), 2.869(65), 2.816(54), 2.385(58), 2.045(35)
Type material is deposited in the collections of the University of Arizona Alfie Norville Gem and Mineral Museum, 15 N Church Ave, Tucson, AZ 85701, USA, catalogue no. 22710 (holotype), and the RRUFF Project, deposition no. R210017 (cotype)
Yang, H., Gu, X., Gibbs, R. B., and Scott, M. M.: Loomisite, IMA 2022-003, in: CNMNC Newsletter 67, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-359-2022, 2022.

IMA 2022-005
Nazarchukite
Nzr
Ca₂NiFe³⁺₂(PO₄)₄
Daba-Siwaqa complex, Transjordan plateau, Jordan (31°21′52′′ N, 36°10′55′′ E)
Sergey N. Britvin, Mikhail N. Murashko, Maria G. Krzhizhanovskaya, Oleg S. Vereshchagin, Natalia S. Vlasenko, Yevgeny Vapnik, and Vladimir N. Bocharov
Isostrukturell mit itelmenite; Struktur ermittelt
Orthorhombisch
Pbca
a = 9.320(3), b = 8.748(3), c = 29.261(9) Å
4.33(51), 3.831(98), 3.597(49), 3.370(100), 3.025(89), 2.934(71), 2.879(80), 2.475(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 5827/1
Britvin, S. N., Murashko, M. N., Krzhizhanovskaya, M. G., Vereshchagin, O. S., Vlasenko, N. S., Vapnik, Y., and Bocharov, V. N.: Nazarchukite, IMA 2022-005, in: CNMNC Newsletter 67, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-359-2022, 2022.

2 New mineral proposals approved in Mai 2022

IMA 2020-036b
Wodegongjieite
Wgj
KCa₃(Al₇Si₉)O₃₂
Cr-11 orebody, Luobusa ophiolite, ca. 200 km ESE of Lhasa, 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
Related to kokchetavite und dmisteinbergite; Struktur ermittelt
Hexagonal
P6/mcc
a = 10.2(2), c = 14.9(3) Å
4.42(73), 3.80(91), 3.73(68), 3.26(49), 2.85(100), 2.55(71), 2.20(17), 2.12(26)
Type material is deposited in the mineralogical collections of the Chinese Geological Museum, Xisiyangrouhutong 15th, Xicheng district, Beijing, China, catalogue number M16104
Xiong, F., Xu, X., Mugnaioli, E., Gemmi, M., Wirth, R., Yang, J., and Grew, E. S.: Wodegongjieite, IMA 2020-036b, in: CNMNC Newsletter 67, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-359-2022, 2022.

IMA 2021-095a
Cuprozheshengite
Czh
Pb₄CuZn₂(AsO₄)₂(PO₄)₂(OH)₂
Sanguozhuang Village, Tangdan Town, Dongchuan District, Kunming City, Yunnan Province, China (26°07′36′′ N, 103°00′19′′ E); Laochang mine, Gejiu ore field, Gejiu City, Yunnan Province, China
Ningyue Sun, Ian E. Grey, Guowu Li, Christian Rewitzer, Yuan Xue, W. Gus Mumme, Hongtao Shen, Jinhua Hao, Colin M. MacRae, Alan Riboldi-Tunnicliffe, Stephanie Boer, im Williams, and Anthony R. Kampf
Dongchuanite-Gruppe; Struktur ermittelt
Triklin
P-1
a = 4.7977(8), b = 8.5789(8), c = 10.3855(9) Å, α = 97.270(8), β = 101.90(1), γ = 91.49(1)°
6.110(21), 4.641(30), 3.441(100), 3.267(34), 3.054(89), 2.948(61), 2.817(44), 2.321(20)
Type material is deposited in the mineralogical collections of the Geological Museum of China, Xisi, Yangrou hutong no. 15, Xicheng District, Beijing, People’s Republic of China, catalogue no. M16127 (holotype); the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue numbers 76191 and 76192; and the Crystal Structure Laboratory, China University of Geosciences, Beijing 100083, People’s Republic of China, catalogue no. DC4 (cotype)
Sun, N., Grey, I. E., Li, G., Rewitzer, C., Xue, Y., Mumme, W. G., Shen, H., Hao, J., MacRae, C. M., Riboldi-Tunnicliffe, A., Boer, S., Williams, T., and Kampf, A. R.:

IMA 2022-007
Tolstykhite
Tls
Au₃S₄Te₆
Gaching, Maletoyvayam deposit, southwestern Koryak Highland, central Kamchatka volcanic belt, Far Eastern region, Russia (60°19′51.87′′ N, 164°46′25.65′′ E)
Anatoly V. Kasatkin, Fabrizio Nestola, Jakub Plášil, Jiˇrí Sejkora, Anna Vymazalová, and Radek Škoda
Das S Analog von maletoyvayamite
Triklin
P-1
a = 8.977(5), b = 9.023(2), c = 9.342(6) Å, α = 94.03(3), β = 110.03(3), γ = 104.27(4)°
8.59(18), 2.90(100), 2.66(6), 2.23(13), 2.14(9), 2.03(9), 1.89(21), 1.72(7)
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 5795/1
Kasatkin, A. V., Nestola, F., Plášil, J., Sejkora, J., Vymazalová, A., and Škoda, R.: Tolstykhite, IMA 2022-007, in: CNMNC Newsletter 67, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-359-2022, 2022.

IMA 2022-008
Gysinite-(La)
Gys-La
PbLa(CO₃)₂(OH)·H₂O
Saima peralkaline complex, ca. 50 km northeast of Fengcheng City, Liaoning Province, China (40°58′20.6′′ N, 124°16′27.8′′ E)
Bin Wu, Xiangping Gu, Can Rao, Rucheng Wang, Xingqing Xing, Jianjun Wan, and Fujun Zhong
Ancylite-Gruppe; Struktur ermittelt
Orthorhombisch
Pmcn
a = 5.0655(2), b = 8.5990(3), c = 7.3901(4) Å
5.596(21), 4.349(100), 3.732(68), 2.984(61), 2.667(21), 2.363(47), 2.090(29), 2.028(21)
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 no. M16133
Wu, B., Gu, X., Rao, C., Wang, R., Xing, X., Wan, J., and Zhong, F.: Gysinite-(La), IMA 2022-008, in: CNMNC Newsletter 67, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-359-2022, 2022.

IMA 2022-009
Scandio-winchite
Swnc
☐(NaCa)(Mg₄Sc)(Si₈O₂₂)(OH)₂
In a serpentinite quarry ca. 1 km west of the Jordanów ́Śląski village (former Jordansmühl), near Sobótka, ca. 30 km south of Wrocław, Lower Silesia, Poland (50°52′16′′ N, 16°50′18′′ E)
Adam Pieczka, Marcin Stachowicz, Sylwia Zelek-Pogudz, Bożena Gołębiowska, Krzysztof Nejbert, Jakub Kotowski, Beata Marciniak-Maliszewska, Adam Szuszkiewicz, Eligiusz Szełęg, Katarzyna M. Stadnicka, and Krzysztof Woźniak
Amphibole-Supergruppe; Struktur ermittelt
Monoklin
C2/m
a = 9.864(2), b = 18.163(3), c = 5.305(2) Å, β = 104.41(3)°
8.455(100), 3.405(45), 3.291(25), 3.137(62), 2.724(86), 2.608(27), 2.542(48), 2.345(27)
Type material is deposited in the collections of the Mineralogical Museum, University of Wrocław, Cybulskiego 30, 50-205 Wrocław, Poland, catalogue number MMUWr IV8118
Pieczka, A., Stachowicz, M., Zelek-Pogudz, S., Gołębiowska, B., Nejbert, K., Kotowski, J., Marciniak-Maliszewska, B., Szuszkiewicz, A., Szełęg, E., Stadnicka, K. M., and Woźniak, K.: Scandio-winchite, IMA 2022-009, in: CNMNC Newsletter 67, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-359-2022, 2022.

IMA 2022-010
Chihmingite
Cim
NiAl₂O₄
Ugelvik peridotite body, Otrøy Island, Norway (62°42′07.41′′ N, 6°42′06.57′′ E)
Shyh-Lung Hwang, Pouyan Shen, Tzen-Fu Yui, Hao-Tsu Chu, Yoshiyuki Iizuka, Hans-Peter Schertl, and Dirk Spengler
Spinel-Supergruppe
Kubisch
Fd-3m
a = 8.059(5) Å
4.646(m), 2.848(m), 2.434(s), 2.022(vs), 1.554(s), 1.424(vs), 1.162(s)
Type material is deposited in the mineralogical collections of the National Museum of Natural Science, No. 1, Guanqian Rd., North Dist., Taichung City 404605, Taiwan, catalogue number NMNS-P023511
Hwang, S.-L., Shen, P., Yui, T.-F., Chu, H.-T., Iizuka, Y., Schertl, H.-P., and Spengler, D.: Chihmingite, IMA 2022-010, in: CNMNC Newsletter 67, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-359-2022, 2022.

IMA 2022-011
Zheshengite
Zh
Pb₄ZnZn₂(AsO₄)₂(PO₄)₂(OH)₂
Sanguozhuang Village, Tangdan Town, Dongchuan District, Kunming City, Yunnan Province, China (26°07′36′′ N, 103°00′19′′ E)
Guowu Li, Ningyue Sun, Hongtao Shen, Yuan Xue, and Jinhua Hao
Dongchuanite-Gruppe; Struktur ermittelt
Triklin
P-1
a = 4.7727(4), b = 8.4864(6), c = 10.4053(7) Å, α = 97.083(6), β = 101.002(7), γ = 93.072(6)°
4.642(58), 4.094(35), 3.444(100), 3.108(72), 2.997(66), 2.806(34), 2.389(42), 2.318(33)
Type material is deposited in the mineralogical collections of the Geological Museum of China, Xisi, No. 15 Yangrou Hutong, Xicheng District, Beijing, People’s Republic of China, catalogue no. M16134 (holotype), and the Crystal Structure Laboratory, China University of Geosciences, Beijing 100083, People’s Republic of China, catalogue no. DC5 (co-type)
Li, G., Sun, N., Shen, H., Xue, Y., and Hao, J.: Zheshengite, IMA 2022-011, in: CNMNC Newsletter 67, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-359-2022, 2022.

IMA 2022-012
Hanahanite
Hnh
[Zn₈(OH)₁₄(SO₄)]·3H₂O
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
Chemically and structurally related to lahnsteinite, namuwite, and osakaite; Struktur ermittelt
Hexagonal
P63
a = 8.312(2), c = 15.295(2) Å
7.64(100), 3.633(16), 3.374(30), 2.716(27), 2.561(38), 2.216(21), 1.858(32), 1.566(37)
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 76212, 76213, and 76214
Kampf, A. R., Smith, J. B., Hughes, J. M., Ma, C., and Emproto, C.: Hanahanite, IMA 2022-012, in: CNMNC Newsletter 67, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-359-2022, 2022.

3 Nomenclature/classification proposals approved in April 2022

Mckelveyite-(Y): end-member formula In the current IMA List of Minerals the chemical formula of mckelveyite-(Y) is given as NaBa3(Ca,U)Y(CO3)6·3H2O. Minor uranium (ca. 0.15 apfu) was detected in the original description of the mineral [Am. Mineral. 50 (1965), 593–612]. However the ideal formula, for stoichiometric constraints, can not contain any U. A crystal structure study of mckelveyite-(Y) [Can. Mineral. 46 (2008), 195–203] clearly shows that the Ca site is occupied by calcium only. Therefore uranium does not occur, or might occur as a subordinate cation; in either case it should be omitted from the chemical formula of mckelveyite-(Y), which becomes NaBa3CaY(CO3)6·3H2O. This is an executive decision taken by the officers of the CNMNC.