Pyroaurite
Mineral Mg6Fe2(CO3)(OH)16·4H2O
About it
Golden-brown to colourless six-sided plates, the iron-bearing partner of hydrotalcite, in serpentinite and iron ores. Known from Långban, Sweden.
- Type
- Mineral
- Group
- Carbonate, hydrotalcite group
- Formula
- Mg6Fe2(CO3)(OH)16·4H2O
- Hardness (Mohs)
- 2.5
- Specific gravity
- 2–2.2
- Streak
- white
- Lustre
- pearly, waxy
- Crystal system
- Trigonal
- Colours
- golden brown, yellow, brownish white, colourless, greenish
- Transparency
- transparent, translucent
- Cleavage and fracture
- perfect basal
Typical values: real specimens vary. For more, see mindat.org.