At room temperature it is a white, odourless, crystalline powder.
These reactions give hexahydrate of strontium bromide (SrBr2·6H2O), which decomposes to dihydrate (SrBr2·2H2O) at 89 °C.
[2] At room temperature, strontium bromide adopts a crystal structure with a tetragonal unit cell and space group P4/n.
The compound's structure was initially erroneously interpreted as being of the PbCl2 type,[3] but this was later corrected.
The beta phase of strontium bromide has a much higher ionic conductivity of about 1 S/cm, comparable to that of molten SrBr2, due to extensive disorder in the bromide sublattice.