cubic Oxides
Magnetite
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 Systemcubic
Hardness (Mohs)5.5
Specific Gravity5.17
CleavageNone (parting on {111} common)
FractureSubconchoidal to uneven
LustreMetallic to sub-metallic
Optical Properties
Optical CharacterIsotropic
PleochroismNone
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
