Calcium Silicotitanate, CaSiTiO₅

Calcium Silicotitanate, CaSiTiO₅, occurs naturally as the mineral titanite or sphene in yellow or bluish-green monoclinic crystals of density 3.3 - 3.7. The synthetic compound, prepared by fusing together calcium oxide, silica, and titanium oxide, forms blue crystals of melting-point 1221° C. When heated to bright redness in carbon dioxide saturated with water vapour at 50° C., calcium titanate is formed.