magnesium hydride

…of beryllium hydride, BeH₂, and magnesium hydride, MgH₂). These metals enter into a direct reaction with hydrogen at elevated temperatures (300–700 °C [570–1,300 °F]) to produce hydrides of the general formulas MH and MH₂. Such compounds are white crystalline solids when pure but are usually gray, owing to trace impurities…