Wairakite
Mineral CaAl2Si4O12·2H2O
About it
The calcium counterpart of analcime, forming trapezohedra in geothermal fields; named for Wairakei, New Zealand, and also found at The Geysers, California.
- Type
- Mineral
- Group
- Silicate (tectosilicate), zeolite group
- Formula
- CaAl2Si4O12·2H2O
- Hardness (Mohs)
- 5.5–6
- Specific gravity
- 2.26
- Streak
- white
- Lustre
- vitreous (glassy), dull
- Crystal system
- Monoclinic
- Colours
- colourless, white
- Transparency
- transparent, translucent
- Cleavage and fracture
- none; two partings at right angles
Typical values: real specimens vary. For more, see mindat.org.