Harmotome
| Harmotome | |
|---|---|
| General | |
| Category | Tectosilicate minerals, zeolite group, phillipsite subgroup |
| Formula | (Ba2(Si12Al4)O32·12H2O |
| IMA symbol | Hrm |
| 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: (Ba2(Si12Al4)O32·12H2O. 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.