Chrome-Omphacite

Where it forms, where it's found

6recorded occurrences

Source · OpenStreetMap

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
8OOxygen Oxygen 6 15.999 95.994
30.14%
14SiSilicon Silicon 2 28.085 56.170
17.64%
24CrChromium Chromium 1 51.996 51.996
16.32%
20CaCalcium Calcium 1 40.078 40.078
12.58%
13AlAluminium Aluminium 1 26.982 26.982
8.47%
12MgMagnesium Magnesium 1 24.305 24.305
7.63%
11NaSodium Sodium 1 22.990 22.990
7.22%
Total 318.515 100.00%
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	6	15.999	95.994	30.14%
14SiSilicon	Silicon	2	28.085	56.170	17.64%
24CrChromium	Chromium	1	51.996	51.996	16.32%
20CaCalcium	Calcium	1	40.078	40.078	12.58%
13AlAluminium	Aluminium	1	26.982	26.982	8.47%
12MgMagnesium	Magnesium	1	24.305	24.305	7.63%
11NaSodium	Sodium	1	22.990	22.990	7.22%
	Total	318.515	100.00%

Synonyms

Chromomphacite

Literature, links & citation

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Chrome-Omphacite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/chrome-omphacite-27602},
  note      = {Accessed 2026-05-11}
}