Calcium silicate
Chemical compound naturally occurring as the mineral larnite / From Wikipedia, the free encyclopedia
For the metasilicate, see Calcium metasilicate.
Calcium silicate can refer to several silicates of calcium including:
- 2CaO·SiO2, larnite (Ca2SiO4)
- 3CaO·SiO2, alite or (Ca3SiO5)
- 3CaO·2SiO2, (Ca3Si2O7)
- CaO·SiO2, wollastonite (CaSiO3).
Quick Facts Names, Identifiers ...
Names | |
---|---|
Preferred IUPAC name
Calcium silicate | |
Systematic IUPAC name
Dicalcium silicate | |
Other names
| |
Identifiers | |
| |
3D model (JSmol) |
|
ChEBI | |
ChemSpider | |
ECHA InfoCard | 100.014.282 |
EC Number |
|
E number | E552 (acidity regulators, ...) |
KEGG |
|
MeSH | Calcium+silicate |
PubChem CID |
|
UNII |
|
CompTox Dashboard (EPA) |
|
| |
| |
Properties | |
Ca2O4Si | |
Molar mass | 172.237 g·mol−1 |
Appearance | White crystals |
Density | 2.9 g/cm3 (solid)[1] |
Melting point | 2,130[2] °C (3,870 °F; 2,400 K) |
0.01% (20 °C)[1] | |
Thermochemistry | |
Std molar entropy (S⦵298) |
84 J/(mol·K)[3] |
Std enthalpy of formation (ΔfH⦵298) |
−1630 kJ/mol[3] |
Pharmacology | |
A02AC02 (WHO) | |
Hazards | |
Occupational safety and health (OHS/OSH): | |
Main hazards |
Irritant |
NFPA 704 (fire diamond) | |
Flash point | Not applicable |
NIOSH (US health exposure limits): | |
PEL (Permissible) |
TWA 15 mg/m3 (total) TWA 5 mg/m3 (resp)[1] |
REL (Recommended) |
TWA 10 mg/m3 (total) TWA 5 mg/m3 (resp)[1] |
IDLH (Immediate danger) |
N.D.[1] |
Safety data sheet (SDS) | [4] |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|
Close
This article focuses on Ca2SiO4, also known as calcium orthosilicate. It is also referred to by the shortened trade name Cal-Sil or Calsil. All calcium silicates are white free-flowing powders. They are components of important structural materials because they are strong, cheap, and nontoxic.