Uranothorianite

Where it forms, where it's found

45recorded occurrences

Source · OpenStreetMap

Radioactivity

Physical

Transparency: Opaque

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
92UUranium Uranium 1 238.029 238.029
47.41%
90ThThorium Thorium 1 232.038 232.038
46.22%
8OOxygen Oxygen 2 15.999 31.998
6.37%
Total 502.065 100.00%
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	1	238.029	238.029	47.41%
90ThThorium	Thorium	1	232.038	232.038	46.22%
8OOxygen	Oxygen	2	15.999	31.998	6.37%
	Total	502.065	100.00%

Synonyms

Uranothorianit
Uranotorianita

Literature, links & citation

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Uranothorianite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/uranothorianite-4114},
  note      = {Accessed 2026-05-11}
}