Zirconium alloys, widely used in the nuclear industry, Fig 1, have a strong affinity for hydrogen that leads to hydrogen pick up during a corrosion reaction when exposed to water. The hydrogen is readily in solution at higher temperature but precipitates as Zirconium hydrides at ambient temperatures. At least three phases are presumed to exist at ambient temperature depending on hydrogen concentration and quenching rate. However, some controversy exist regarding the exact nature, exact structure and stability of the γ-ZrH phase, which is closely related to the δ-ZrH phase through ordering of the hydrogen on tetrahedral sites on alternating 110 planes.