Gibbsite
Al(OH)₃
Oxides
Hardness —
· Monoclinic
Photo: Wikimedia Commons
Galaxite
Mn²⁺Al₂O₄
Spinel, oxide mineral
Properties
- Chemical formula
- Mn²⁺Al₂O₄
- Group
- Oxides
- Crystal system
- Cubic
- Hardness (Mohs)
- —
- Color
- Black
- Luster
- —
- Streak
- —
- Density
- —
- Cleavage
- —
- Fracture
- —
- Tenacity
- —
- Crystal habit
- —
- Transparency
- —
- Space group
- Fd-3m
- Fluorescence
- —
- Magnetism
- —
- Radioactivity
- —
- Refractive index
- —
- Optical character
- —
- Birefringence
- —
- Pleochroism
- —
- Strunz classification
- 4.BB.05
- Dana classification
- 7.2.1.2
- IMA status
- Grandfathered mineral (G)
- IMA symbol
- Glx
- Locality
- 🇺🇸 Bald Knob deposit
- Type locality
- —
- Discovery year
- —
Etymology
Named after Galax
Source: Wikidata
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