Senarmontite
Mineral Sb2O3
Take care.
- Toxic: Wash your hands after handling it, don't lick or taste it, and don't make dust.
About it
Colourless to white octahedrons with a resinous shine, the cubic form of antimony oxide, formed as stibnite and other antimony ores oxidize. Big crystals come from Djebel Hamimat, Algeria.
- Type
- Mineral
- Group
- Oxide
- Formula
- Sb2O3
- Hardness (Mohs)
- 2–2.5
- Specific gravity
- 5.5–5.6
- Streak
- white
- Lustre
- resinous, adamantine (diamond-like)
- Crystal system
- Isometric (cubic)
- Colours
- colourless, white, grey
- Transparency
- transparent, translucent
- Cleavage and fracture
- poor octahedral; uneven fracture
Typical values: real specimens vary. For more, see mindat.org.