The paramagnetic susceptibility of chromium hydride

The magnetic susceptibility of chromium hydride increases from 3·5 × 10 −6 c.g.s. for pure Cr metal to 14·0 × 10 −6 c.g.s. at CrH 1·4 . On removal of hydrogen at room temperature the susceptibility remains high and this may be related to the formation of a defective hexagonal phase for CrH . The hexagonal phase can also exist for CrH >1·0 when it is probably metal deficient. The activation energy for the decomposition of chromium hydride is 2·36 ± 0·02 kcal/mole.