Iron-bearing Calcite

Where it forms, where it's found

110recorded occurrences

Source · OpenStreetMap

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
26FeIron Iron 1 55.845 55.845
35.82%
8OOxygen Oxygen 3 15.999 47.997
30.78%
20CaCalcium Calcium 1 40.078 40.078
25.70%
6CCarbon Carbon 1 12.011 12.011
7.70%
Total 155.931 100.00%
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
26FeIron	Iron	1	55.845	55.845	35.82%
8OOxygen	Oxygen	3	15.999	47.997	30.78%
20CaCalcium	Calcium	1	40.078	40.078	25.70%
6CCarbon	Carbon	1	12.011	12.011	7.70%
	Total	155.931	100.00%

Synonyms

Ferroan Calcite
Ferruginous Calcite

Literature, links & citation

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Iron-bearing Calcite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/iron-bearing-calcite-10299},
  note      = {Accessed 2026-05-11}
}