Mg2NiH2 crystallizes in the tetragonal P4_2/mnm space group. Mg(1) is bonded in a 4-coordinate geometry to four equivalent H(1) atoms. Ni(1) is bonded in a linear geometry to two equivalent H(1) atoms. H(1) is bonded to four equivalent Mg(1) and one Ni(1) atom to form a mixture of corner and edge-sharing HMg4Ni square pyramids.
Mg2NiH2 crystallizes in the tetragonal P4_2/mnm space group. Mg(1) is bonded in a 4-coordinate geometry to four equivalent H(1) atoms. All Mg(1)-H(1) bond lengths are 2.23 Å. Ni(1) is bonded in a linear geometry to two equivalent H(1) atoms. Both Ni(1)-H(1) bond lengths are 1.54 Å. H(1) is bonded to four equivalent Mg(1) and one Ni(1) atom to form a mixture of corner and edge-sharing HMg4Ni square pyramids.