CaCO₃CaCO3100.0900 g·mol⁻¹
Molar mass100.090 g·mol⁻¹calc 100.086 • Atomic weights: CIAAW 2021 (conventional atomic weights)
FormulaCaCO₃CaCO3
Classsalt • ionicsolid
| Element | Count | Mass (g/mol) | Mass % |
|---|---|---|---|
| Ca | 1 | 40.078 | 40.04% |
| C | 1 | 12.011 | 12.00% |
| O | 3 | 47.997 | 47.96% |
Physical properties
- State at STP
- solid
- Density
- 2.71 g·cm⁻³ (calcite at 20 °C, 1 atm)
- Melting point
- 1612 K (decomposes to CaO + CO₂)
- Boiling point
- —
Structure & bonding
Ionic Ca2+ with trigonal planar CO32-. Dissolves in acid with CO2 evolution.
Occurrence & preparation
Abundant as limestone, chalk, marble.
Uses
- Construction aggregates
- Antacid
Safety
Low hazard as solid; dust irritates lungs.
Consult current SDS. — consult current SDS before handling.