Kamacite

(Fe,Ni)
Discovered
1861
Also known as
  • Balkeneisen
  • Kamacit
  • Kamacita
  • +3 more

Where it forms, where it's found

904recorded occurrences
Source · OpenStreetMap

Physical

Hardness
123456789104/ 10 MOHS
  1. 1Talc
  2. 2Gypsum
  3. 3Calcite
  4. 4Fluorite
  5. 5Apatite
  6. 6Orthoclase
  7. 7Quartz
  8. 8Topaz
  9. 9Corundum
  10. 10Diamond
Lustre
Metallic
Colour
Grey
Streak
Grey

Optical

Optical type
Isotropic
Isotropy testPPL ↔ XPL diagnostic
PPL intrinsic colour; no change on stage rotation
XPL extinct at every orientation

Crystallography

Crystal system
Isometric
Cell parameters
a = 2.86 Å

Chemical composition

Constituent elements
Mass composition breakdown
ElementAtoms At. mass g/mol Mass g/molMass share
28NiNickelNickel158.69358.693
51.24%
26FeIronIron155.84555.845
48.76%
Total114.538100.00%

Mass share = atoms × atomic mass ÷ molar mass × 100

From Mindat formula

Impurities
  • Co
  • C
  • P
  • S

Synonyms

  • Balkeneisen
  • Kamacit
  • Kamacita
  • Kamazit
  • Kamazite
  • Nickel-Eisen

Classification

Dana
8th ed.

01.01.11.01

  • 01Native Elements and AlloysClass
  • 01.01Metals, other than the Platinum GroupType
  • 01.01.11Iron-Nickel groupGroup
  • 01.01.11.01KamaciteSpecies
CIM

1.62

  • 1Elements and Alloys (including the arsenides, antimonides and bismuthides of Cu, Ag and Au)Class
  • 1.62— unnamed intermediate level —Group
  • 1.62KamaciteSpecies

Group, growth & confusion

Often grow together
4 minerals

Literature, links & citation

Citations
  1. 1965Reed, S.J.B (1965) Election-probe microanalysis of the metallic phases in iron meteorites. Geochimica et Cosmochimica Acta, 29 (5) 535-549 doi:10.1016/0016-7037(65)90045-1DOI: 10.1016/0016-7037(65)90045-1
  2. 1966Ramsden, A. R., Cameron, E. N. (1966) Kamacite and taenite superstructures and a metastable tetragonal phase in iron meteorites. American Mineralogist, 51 (1-2) 37-55
  3. 1975Buchwald, Vagn F. (1975) Handbook of Iron Meteorites - Their History, Distribution, Composition and Structure. University of California Press.
  4. 1993Clark, A. M. (1993) Hey's Mineral Index - Mineral Species, Varieties and Synonyms (3rd ed.). Natural History Museum.
  5. 2005(2005) Kamacite. Handbook of Mineralogy. Mineralogical Society of America
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Kamacite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/kamacite-2143},
  note      = {Accessed 2026-05-11}
}