Strontium aluminate

Strontium aluminate
Names
	IUPAC name Strontium aluminate
Identifiers
CAS Number	12004-37-4 ;
3D model (JSmol)	Interactive image;
ECHA InfoCard	100.031.310
EC Number	234-455-3;
PubChem CID	165931;
CompTox Dashboard (EPA)	DTXSID70892151 ;
	InChI InChI=1S/2Al.5O.2Sr/q2+3;5-2;2*+2;
	SMILES [O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Al+3].[Sr+2].[Sr+2];
Properties
Chemical formula	SrAl2O4
Molar mass	205.58 g/mol
Appearance	Pale yellow powder
Density	3.559 g/cm3
Structure
Crystal structure	Monoclinic
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Strontium aluminate is an aluminate compound with the chemical formula SrAl₂O₄ (sometimes written as SrO·Al₂O₃). It is a pale yellow, monoclinic crystalline powder that is odourless and non-flammable. When activated with a suitable dopant (e.g. europium, written as Eu:SrAl₂O₄), it acts as a photoluminescent phosphor with long persistence of phosphorescence.

Strontium aluminates exist in a variety of other compositions including SrAl₄O₇ (monoclinic), Sr₃Al₂O₆ (cubic), SrAl₁₂O₁₉ (hexagonal), and Sr₄Al₁₄O₂₅ (orthorhombic). The different compositions cause different colours of light to be emitted.