Spanoite

Where it forms, where it's found

Type locality: Atlanta mine
Atlanta Mining District
Lincoln County
Nevada
USA
38.4659°, -114.3227°

1recorded occurrences

Source · OpenStreetMap

Radioactivity

Crystallography

Crystal system: Monoclinic
Space group: P21/c
Cell parameters: a = 6.8535(5) Å · b = 8.4214(4) Å · c = 10.5181(6) Å
Cell angles: β = 105.364(4) °
Ratio a:b:c: 1 : 1.229 : 1.535

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
92UUranium Uranium 2 238.029 476.058
40.39%
81TlThallium Thallium 2 204.380 408.760
34.68%
8OOxygen Oxygen 12 15.999 191.988
16.29%
23VVanadium Vanadium 2 50.942 101.884
8.64%
Total 1178.690 100.00%
Mass share = atoms × atomic mass ÷ molar mass × 100
From Mindat formula

Mass composition breakdown
Element	Atoms	At. mass g/mol	Mass g/mol	Mass share
92UUranium	Uranium	2	238.029	476.058	40.39%
81TlThallium	Thallium	2	204.380	408.760	34.68%
8OOxygen	Oxygen	12	15.999	191.988	16.29%
23VVanadium	Vanadium	2	50.942	101.884	8.64%
	Total	1178.690	100.00%

Synonyms

IMA2025-086
Spanoiet

In other languages

Catalan: spanoïta

Classification

Strunz

10th ed.

4.HB.X

4OxidesClass
4.HV[5,6] VanadatesDivision
4.HBUranyl SorovanodatesGroup
4.HB.XSpanoiteSpecies

Literature, links & citation

Citations

—Olds, T.A., Emproto, C., Barth, B., Burns, P.C., Kampf, A.R., Ma, C., Lussier, A.J., Plášil, J., Sterling, G.D., Kartashov, P.M. and Désor, J. (2026) Spanoite, IMA 2025-086. CNMNC Newsletter 89, Mineralogical Magazine, 90, https://doi.org/10.1180/mgm.2026.10199

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Spanoite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/spanoite-499395},
  note      = {Accessed 2026-05-11}
}