MgCa is beta-prime cadmium gold structured and crystallizes in the orthorhombic Pmma space group. Ca(1) is bonded to four equivalent Ca(1) and eight equivalent Mg(1) atoms to form a mixture of distorted corner, edge, and face-sharing CaCa4Mg8 cuboctahedra. Mg(1) is bonded in a 8-coordinate geometry to eight equivalent Ca(1) atoms.
MgCa is beta-prime cadmium gold structured and crystallizes in the orthorhombic Pmma space group. Ca(1) is bonded to four equivalent Ca(1) and eight equivalent Mg(1) atoms to form a mixture of distorted corner, edge, and face-sharing CaCa4Mg8 cuboctahedra. There are two shorter (3.58 Å) and two longer (3.67 Å) Ca(1)-Ca(1) bond lengths. There are a spread of Ca(1)-Mg(1) bond distances ranging from 3.41-3.57 Å. Mg(1) is bonded in a 8-coordinate geometry to eight equivalent Ca(1) atoms.