Newsletter 59

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 powder X-ray 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. CNMNC Newsletter 59; Mineralogical Magazine, 85, https://doi.org/10.1180/mgm.2021.5 IMA No. 2020-067 Donowensite Ca(H2O)3Fe3+2(V2O7)2 North Wilson pit, Wilson Springs mine (a.k.a. Union Carbide mine), Wilson Springs (a.k.a. Potash Sulfur Springs), Garland Co., Arkansas, USA (34°28’40”N, 92°58’05”W) Anthony R. Kampf*, John M. Hughes, Barbara P. Nash and Jason B. Smith *E-mail: akampf@nhm.org New structure type Triclinic: P\(\overline 1 \); structure determined a = 7.3452(4), b = 9.9291(4), c = 10.0151(7) Å, α = 94.455(7), β = 98.476(7), γ = 100.779(7)° 9.88(100), 7.12(24), 4.176(17), 3.671(20), 3.283(44), 3.202(22), 3.110(19), 2.973(26) 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 75041 and 75042 How to cite: CNMNC Newsletter 59; Mineralogical Magazine, 85, https://doi.org/10.1180/mgm.2021.5 IMA No. 2020-068 Mikehowardite Fe3+4(V5+O4)4(H2O)2⋅H2O North Wilson pit, Wilson Springs mine (a.k.a. Union Carbide mine), Wilson Springs (a.k.a. Potash Sulfur Springs), Garland Co., Arkansas, USA (34°28’40”N, 92°58’05”W) Anthony R. Kampf*, John M. Hughes, Barbara P. Nash and Jason B. Smith *E-mail: akampf@nhm.org Structurally related to schubnelite Triclinic: P\(\overline 1 \); structure determined a = 6.655(2), b = 6.669(1), c = 9.003(2) Å, α = 76.515(5), β = 84.400(6), γ = 75.058(5)° 8.799(86), 6.449(100), 3.693(29), 3.198(88), 2.982(50), 2.909(59), 2.792(31), 2.145(30) 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 75041 and 75042 How to cite: CNMNC Newsletter 59; Mineralogical Magazine, 85, https://doi.org/10.1180/mgm.2021.5