CaSO₄CaSO4136.1400 g·mol⁻¹
Molar mass136.140 g·mol⁻¹calc 136.134 • Atomic weights: CIAAW 2021 (conventional atomic weights)
FormulaCaSO₄CaSO4
Classsalt • ionicsolid
| Element | Count | Mass (g/mol) | Mass % |
|---|---|---|---|
| Ca | 1 | 40.078 | 29.44% |
| S | 1 | 32.060 | 23.55% |
| O | 4 | 63.996 | 47.01% |
Physical properties
- State at STP
- solid
- Density
- 2.96 g·cm⁻³ (anhydrite at 20 °C, 1 atm)
- Melting point
- 1733 K (1 atm)
- Boiling point
- —
Structure & bonding
Ca2+ with tetrahedral SO42-. Forms gypsum dihydrate CaSO4·2H2O.
Occurrence & preparation
Natural evaporite mineral; industrial by-product.
Uses
- Plaster
- Cement
Safety
Low hazard; dust irritates.
Consult current SDS. — consult current SDS before handling.