Calcium silicate

Calcium silicate can refer to several silicates of calcium including:

• CaO·SiO₂, wollastonite (CaSiO₃)
• 2CaO·SiO₂, larnite (Ca₂SiO₄)
• 3CaO·SiO₂, alite or (Ca₃SiO₅)
• 3CaO·2SiO₂, (Ca₃Si₂O₇).

This article focuses on Ca₂SiO₄, also known as calcium orthosilicate, or by the shortened trade name Cal-Sil/Calsil. All calcium silicates are white free-flowing powders. Being strong, cheap and nontoxic, they are components of important structural materials.