Ca2FeGaO5 crystallizes in the orthorhombic Pnma space group. Ca(1) is bonded in a 7-coordinate geometry to one O(1), two equivalent O(3), and four equivalent O(2) atoms. Fe(1) is bonded to two equivalent O(3) and four equivalent O(2) atoms to form FeO6 octahedra that share corners with four equivalent Fe(1)O6 octahedra and corners with two equivalent Ga(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 14°. Ga(1) is bonded to two equivalent O(1) and two equivalent O(3) atoms to form GaO4 tetrahedra that share corners with two equivalent Fe(1)O6 octahedra and corners with two equivalent Ga(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ca(1) and two equivalent Ga(1) atoms to form distorted corner-sharing OCa2Ga2 tetrahedra. In the second O site, O(2) is bonded in a 6-coordinate geometry to four equivalent Ca(1) and two equivalent Fe(1) atoms. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Ca(1), one Fe(1), and one Ga(1) atom.
Ca2FeGaO5 crystallizes in the orthorhombic Pnma space group. Ca(1) is bonded in a 7-coordinate geometry to one O(1), two equivalent O(3), and four equivalent O(2) atoms. The Ca(1)-O(1) bond length is 2.37 Å. There is one shorter (2.33 Å) and one longer (2.51 Å) Ca(1)-O(3) bond length. There are a spread of Ca(1)-O(2) bond distances ranging from 2.47-2.74 Å. Fe(1) is bonded to two equivalent O(3) and four equivalent O(2) atoms to form FeO6 octahedra that share corners with four equivalent Fe(1)O6 octahedra and corners with two equivalent Ga(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 14°. Both Fe(1)-O(3) bond lengths are 2.15 Å. There are two shorter (1.98 Å) and two longer (2.00 Å) Fe(1)-O(2) bond lengths. Ga(1) is bonded to two equivalent O(1) and two equivalent O(3) atoms to form GaO4 tetrahedra that share corners with two equivalent Fe(1)O6 octahedra and corners with two equivalent Ga(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. There is one shorter (1.91 Å) and one longer (1.93 Å) Ga(1)-O(1) bond length. Both Ga(1)-O(3) bond lengths are 1.84 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ca(1) and two equivalent Ga(1) atoms to form distorted corner-sharing OCa2Ga2 tetrahedra. In the second O site, O(2) is bonded in a 6-coordinate geometry to four equivalent Ca(1) and two equivalent Fe(1) atoms. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Ca(1), one Fe(1), and one Ga(1) atom.