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Calcium carbonate

**Properties**
General
Name	Calcium carbonate
Chemical formula	Ca CO₃
Appearance	White solid
Physical
Formula weight	100.1 amu
Melting point	Liquifies under high pressure at 1612 K (1339 °C)
Boiling point	decomposes at 1172 K (899 °C)
Density	2.7 ×10³ kg/m³
Crystal structure	Calcite or aragonite
Solubility	0.0013 g in 100g water
Thermochemistry
Δ_fH⁰_liquid	-1154 kJ/mol
Δ_fH⁰_solid	-1207 kJ/mol
S⁰_solid	93 J/mol·K
Safety
Ingestion	Low hazard for accidental injestion.
Inhalation	Low hazard, may cause problems in the long term.
Skin	Low hazard.
Eyes	Low hazard.
More info	Hazardous Chemical Database
SI units were used where possible. Unless otherwise stated, standard conditions were used. Disclaimer and references

Calcium carbonate is a chemical compound, with chemical formula Ca C O₃. It has common use as an antacid.

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:

Referenced By

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Calcium carbonate".