Shumwayite Explained

Shumwayite
Category:	Sulfate mineral
Formula:	(UO2)2(SO4)2•5H2O
Imasymbol:	Smw^[1]
System:	Monoclinic
Class:	Prismatic (2/m) (same H-M symbol)
Symmetry:	P21/c
Unit Cell:	a = 6.75 Å, b = 12.50 Å c = 16.90 Å, β = 90.92° (approximated)
Other:	Radioactive

Shumwayite is a rare^[2] but relatively simple uranyl sulfate mineral with the formula (UO₂)₂(SO₄)₂•5H₂O. It was discovered in the Green Lizard and Giveaway-Simplot mines of the White Canyon mining district, San Juan County, Utah, US.^[3]

Relation to other minerals

The structure of shumwayite is unique.^[3] Somewhat chemically similar natural uranyl sulfates include jáchymovite, metauranopilite and uranopilite.^{[4] [5] [6]}

Notes and References

1. Warr. L.N.. 2021. IMA–CNMNC approved mineral symbols. Mineralogical Magazine. 85. 3 . 291–320. 10.1180/mgm.2021.43 . 2021MinM...85..291W . 235729616 . free.
2. Web site: Shumwayite: Shumwayite mineral information and data . Mindat.org . 2016-03-13.
3. Kampf, A.R., Plášil, J., Kasatkin, A.V., Marty, J.,Čejka, J., and Lapčák, L., 2015. Shumwayite, IMA 2015-058. CNMNC Newsletter No. 27, October 2015, 1228; Mineralogical Magazine 79, 1229–1236
4. Web site: Jáchymovite: Jáchymovite mineral information and data . Mindat.org . 2016-03-13.
5. Web site: Metauranopilite: Metauranopilite mineral information and data . Mindat.org . 2016-03-13.
6. Web site: Uranopilite: Uranopilite mineral information and data . Mindat.org . 2016-03-13.