cubic Oxides
Magnetite
Formula Fe3O4
Crystal Structure
#! Species: Magnetite
#! System: Cubic (m3m)
#! Habit: Octahedral
cubic[m3m]:{111}
cubic
m3m
{111}
Quick Facts
Hardness
5.5
Specific Gravity
5.17
Optical Character
Isotropic
Physical Properties
- Crystal System
- cubic
- Hardness (Mohs)
- 5.5
- Specific Gravity
- 5.17
- Cleavage
- None (parting on {111} common)
- Fracture
- Subconchoidal to uneven
- Lustre
- Metallic to sub-metallic
Optical Properties
- Optical Character
- Isotropic
- Pleochroism
- None
Characteristics
Colours
BlackGrey-blackIron-black
Localities
Sweden (Kiruna)South AfricaUSA (Adirondacks, Utah)RussiaBrazilAustralia
Crystal Forms
octahedrondodecahedron
Notes
Opaque mineral - RI not measurable with standard equipment; strongly magnetic
Related Minerals
Other minerals in the cubic system
