Magnomagnetite

(Fe,Mg)Fe2O4

Where it forms, where it's found

4recorded occurrences
Source · OpenStreetMap

Physical

Transparency
Opaque
Colour
black
Streak
black or dark-grey
Tenacity
brittle
Cleavage
None Observed
Fracture
Irregular/Uneven

Chemical composition

Constituent elements
Mass composition breakdown
ElementAtoms At. mass g/mol Mass g/molMass share
26FeIronIron355.845167.535
65.49%
8OOxygenOxygen415.99963.996
25.01%
12MgMagnesiumMagnesium124.30524.305
9.50%
Total255.836100.00%

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

From Mindat formula

Literature, links & citation

Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Magnomagnetite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/magnomagnetite-55642},
  note      = {Accessed 2026-05-11}
}