Barium titanate

Barium titanate
	; Polycrystalline BaTiO3 in plastic
Identifiers
CAS Number	12047-27-7 ;
3D model (JSmol)	Interactive image;
ChemSpider	10605734 ;
ECHA InfoCard	100.031.783
EC Number	234-975-0;
PubChem CID	6101006;
RTECS number	XR1437333;
UNII	73LKE302QO ;
CompTox Dashboard (EPA)	DTXSID20892161 ;
	InChI InChI=1S/2Ba.4O.Ti/q2+2;4-1; Key: JRPBQTZRNDNNOP-UHFFFAOYSA-N ; InChI=1/2Ba.4O.Ti/q2+2;4-1;/r2Ba.O4Ti/c;;1-5(2,3)4/q2*+2;-4 Key: JRPBQTZRNDNNOP-NXYSCRTKAD;
	SMILES [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-];
Properties
Chemical formula	BaTiO3
Molar mass	233.192 g/mol
Appearance	White crystals
Odor	Odorless
Density	6.02 g/cm3, solid
Melting point	1,625 °C (2,957 °F; 1,898 K)
Solubility in water	Insoluble
Solubility	Slightly soluble in dilute mineral acids; dissolves in concentrated hydrofluoric acid
Band gap	3.2 eV (300 K, single crystal)
Refractive index (nD)	no = 2.412; ne = 2.360
Structure
Crystal structure	Tetragonal, tP5
Space group	P4mm, No. 99
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H302, H332
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Barium titanate (BTO) is an inorganic compound with chemical formula BaTiO₃. Barium titanate appears white as a powder and is transparent when prepared as large crystals. It is a ferroelectric, pyroelectric, and piezoelectric ceramic material that exhibits the photorefractive effect. It is used in capacitors, electromechanical transducers and nonlinear optics.

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