Scandium hydride, also known as scandium- hydrogen alloy, is an alloy formed by combining scandium and hydrogen. This phase can dissolve as much as 6.30% hydrogen. Scandium trihydride is an unstable molecular compound with the chemical formula ScH3. It has been produced as one of a number of other molecular scandium hydride products at low temperature employing laser ablation and characterized by infrared spectroscopy. Scandium trihydride is a quasitrigonal planar molecule with three equivalent Sc-H bonds. It has a (C3v) structure with an equilibrium distance between Sc and H of 182.0 pm and the bond angle is 119.2°. By weight percent, the composition of scandium trihydride is 6.30% hydrogen and 93.70% scandium. In scandium trihydride, the formal oxidation states of H and Sc are 21 and 13, respectively, since the electronegativity of scandium is lower than that of hydrogen.
