Martite

Where it forms, where it's found

325recorded occurrences

Source · OpenStreetMap

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
26FeIron Iron 2 55.845 111.690
69.94%
8OOxygen Oxygen 3 15.999 47.997
30.06%
Total 159.687 100.00%
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	2	55.845	111.690	69.94%
8OOxygen	Oxygen	3	15.999	47.997	30.06%
	Total	159.687	100.00%

Synonyms

Martit
Martita

Literature, links & citation

Citations

1944Palache, Charles, Berman, Harry, Frondel, Clifford (1944) The System of Mineralogy (7th ed.) Vol. 1 - Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, New York.
2022Mota e Nogueira, Victor, Paola F. Barbosa, Sathish Mayanna, Adalene M. Silva, Catarina L.B. Toledo, Leonardo E. Lagoeiro, and Luciano M.d. Assis. (2022) "Characterization of the Crystallographic Preferred Orientation Relationships of the Magnetite-Hematite-Goethite Phase Transformation during Martitization" Minerals 12, no. 3: 326. https://doi.org/10.3390/min12030326

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Martite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/martite-2583},
  note      = {Accessed 2026-05-11}
}