Calcium titanate

Calcium titanate

Names
Other names calcium titanium oxide
Identifiers
CAS Number	12049-50-2 Y
3D model (JSmol)	Interactive image
ChemSpider	17340234 Y
ECHA InfoCard	100.031.795
PubChem CID	16212381
RTECS number	XR2568666
InChI InChI=1S/Ca.3O.Ti/q+2;;2*-1; Y Key: AOWKSNWVBZGMTJ-UHFFFAOYSA-N Y InChI=1/Ca.3O.Ti/q+2;;2*-1;/rCa.O3Ti/c;1-4(2)3/q+2;-2 Key: AOWKSNWVBZGMTJ-SLQOSCGQAQ
SMILES [Ca+2].[O-][Ti]([O-])=O
Properties
Chemical formula	CaTiO3
Molar mass	135.943 g/mol
Appearance	white powder
Density	3.98 g/cm3
Melting point	1,975 °C (3,587 °F; 2,248 K)
Boiling point	3,000 °C (5,430 °F; 3,270 K)
Solubility in water	insoluble
Hazards
Lethal dose or concentration (LD, LC):
LD50 (median dose)	>1200 mg/kg (oral, rat)
Thermochemistry
Std molar entropy (So298)	94.64 J/mol·K
Std enthalpy of formation (ΔfHo298)	-166.0630 kJ/mol
Gibbs free energy (ΔfG˚)	-157.5256 kJ/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y  (what is YN ?)
Infobox references

Calcium titanate is an inorganic compound with the chemical formula CaTiO₃. As a mineral, it is called perovskite, named after Russian mineralogist, L. A. Perovski (1792-1856). It is a colourless, diamagnetic solid, although the mineral is often coloured owing to impurities.

CaTiO₃ can be prepared by the combination of CaO and TiO₂ at temperatures >1300 °C. Sol-gel processes has been used to make a more pure substance, as well as lowering the synthesis temperature. These compounds synthesized are more compressible due to the powders from the sol-gel process as well and bring it closer to its calculated density (~4.04 g/ml).

Calcium titanate is obtained as orthorhombic crystals, more specifically perovskite structure. In this motif, the Ti(IV) centers are octahedral and the Ca²⁺ centers occupy a cage of 12 oxygen centres. Many useful materials adopt related structures, e.g. barium titanate or variations of the structure, e.g. yttrium barium copper oxide.

Calcium titanate has relatively little value except as one of the ores of titanium, together with several others. It is reduced to give titanium metal or ferrotitanium alloys.