Calcium carbonate
From Freepedia
| Calcium carbonate | |
|---|---|
| Image:Calcium carbonate.jpg | |
| General | |
| Other names | see text |
| Molecular formula | CaCO3 |
| Molar mass | 100.09 g/mol |
| Appearance | white solid |
| CAS number | [471-34-1] |
| Properties | |
| Density and phase | 2.8 g/cm3, solid |
| Solubility in water | insoluble |
| Melting point | 825 °C decomp. |
| Structure | |
| Coordination geometry | ? |
| Crystal structure | ? |
| Dipole moment | ? D |
| Hazards | |
| MSDS | External MSDS |
| EU classification | |
| R-phrases | |
| S-phrases | |
| Supplementary data page | |
| Structure and properties | n, εr, etc. |
| Thermodynamic data | Phase behaviour Solid, liquid, gas |
| Spectral data | UV, IR, NMR, MS |
| Related compounds | |
| Other anions | Calcium bicarbonate |
| Other cations | Magnesium carbonate Strontium carbonate |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references | |
Calcium carbonate is a chemical compound, with chemical formula CaCO3.
Calcium carbonate is insoluable in water itself, but it can react with water and carbon dioxide to form calcium bicarbonate (with chemical formula Ca(HCO3)2), which is slightly soluable, so rocks containing the substance may corrode.
It is commonly used as an antacid, and is the active ingredient in agricultural lime. It is a common substance found as rock in all parts of the world and is the main component of seashells and the shell of snails.
As rock, it is found in the following states:
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