Harmotome | |
---|---|
General | |
Category | zeolites |
Formula (repeating unit) | (Ba0.5,Ca0.5,Na,K)5Al5,Si11O32·12(H2O) |
IMA symbol | Hrm[1] |
Crystal system | Monoclinic |
Crystal class | Prismatic (2/m) (same H-M symbol) |
Space group | P21/m |
Identification | |
Specific gravity | 2.44 to 2.5 |
Harmotome is a mineral, one of the rarer zeolites; a hydrated barium silicate with formula: (Ba0.5,Ca0.5,Na,K)5Al5,Si11O32·12(H2O). It forms vitreous white well defined monoclinic crystals, often associated with calcite and other zeolites. It has a Mohs hardness of 4 to 5 and a specific gravity of 2.44 to 2.5.