Strontium barium niobate

Strontium barium niobate is the chemical compound Sr_xBa_1−xNb₂O₆ for 0.32≤x≤0.82.^[1]

Strontium barium niobate

Identifiers
CAS Number	x=0.5: 37185-09-4
3D model (JSmol)	x=0.5: Interactive image
EC Number	x=0.5: 253-383-3
PubChem CID	x=0.5: 21862943
CompTox Dashboard (EPA)	x=0.5: DTXSID70190669
InChI InChI=1S/Ba.4Nb.12O.Sr/q+2;;;;;;;;;;;;;4*-1;+2 Key: DKDQMLPMKQLBHQ-UHFFFAOYSA-N
SMILES x=0.5: [O-][Nb](=O)=O.[O-][Nb](=O)=O.[O-][Nb](=O)=O.[O-][Nb](=O)=O.[Sr+2].[Ba+2]
Properties
Chemical formula	(Srx,Ba1−x)Nb2O6 for 0.32≤x≤0.82
Density	5.24-5.39 g/cm3 [1]
Melting point	1,427–1,480[2] °C (2,601–2,696 °F; 1,700–1,753 K)
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H302, H332
Precautionary statements	P261, P264, P270, P271, P301+P312, P304+P312, P304+P340, P312, P330, P501
Structure
Crystal structure	Tetragonal
Space group	P4bm [1]
Point group	4mm
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Strontium barium niobate is a ferroelectric material commonly used in single crystal form in electro-optics, acousto-optics, and photorefractive non-linear optics for its photorefractive properties.

Strontium barium niobate is one of the few tetragonal tungsten bronze compounds without volatile elements making it a useful system for probing structure-property relations. Strontium barium niobate is a normal ferroelectric for Barium-rich compositions and becomes a relaxor ferroelectric with increasing strontium content.^[3] This has been attributed to positional disorder of the A-site cations ^[4] alongside incommensurate oxygen octahedral tilting ^[5]

Strontium barium niobate is one of numerous ceramic materials that are known to exhibit abnormal grain growth, in which certain grains grow very large within a matrix of finer equiaxed grains. This abnormal grain growth (AGG) has significant consequences on the dielectric and electronic performance of strontium barium niobate ^[6]