Chiolite
Mineral Na5Al3F14
About it
Snow-white masses and small pyramids of sodium aluminium fluoride, found with cryolite. Known from Miass in the southern Urals, Russia, and Ivittuut, Greenland.
- Type
- Mineral
- Group
- Halide
- Formula
- Na5Al3F14
- Hardness (Mohs)
- 3.5–4
- Specific gravity
- 2.95–3
- Streak
- white
- Lustre
- vitreous (glassy)
- Crystal system
- Tetragonal
- Colours
- colourless, snow white
- Transparency
- transparent, translucent
- Cleavage and fracture
- perfect basal
Typical values: real specimens vary. For more, see mindat.org.