Nickel-bearing Talmessite

Where it forms, where it's found

3recorded occurrences

Source · OpenStreetMap

Safety & handling

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
8OOxygen Oxygen 10 15.999 159.990
33.54%
33AsArsenic Arsenic 2 74.922 149.844
31.41%
20CaCalcium Calcium 2 40.078 80.156
16.80%
28NiNickel Nickel 1 58.693 58.693
12.30%
12MgMagnesium Magnesium 1 24.305 24.305
5.10%
1HHydrogen Hydrogen 4 1.008 4.032
0.85%
Total 477.020 100.00%
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
8OOxygen	Oxygen	10	15.999	159.990	33.54%
33AsArsenic	Arsenic	2	74.922	149.844	31.41%
20CaCalcium	Calcium	2	40.078	80.156	16.80%
28NiNickel	Nickel	1	58.693	58.693	12.30%
12MgMagnesium	Magnesium	1	24.305	24.305	5.10%
1HHydrogen	Hydrogen	4	1.008	4.032	0.85%
	Total	477.020	100.00%

Synonyms

Nickeloan Talmessite

Literature, links & citation

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Nickel-bearing Talmessite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/nickel-bearing-talmessite-29433},
  note      = {Accessed 2026-05-11}
}