Ca3Rh2Ga3 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 10-coordinate geometry to three equivalent Rh(1), two equivalent Ga(1), and five equivalent Ga(2) atoms. In the second Ca site, Ca(2) is bonded in a 9-coordinate geometry to four equivalent Rh(1), two equivalent Ga(2), and three equivalent Ga(1) atoms. Rh(1) is bonded in a 4-coordinate geometry to two equivalent Ca(2), three equivalent Ca(1), one Ga(1), and three equivalent Ga(2) atoms. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to three equivalent Ca(2), four equivalent Ca(1), and two equivalent Rh(1) atoms. In the second Ga site, Ga(2) is bonded in a 9-coordinate geometry to one Ca(2), five equivalent Ca(1), and three equivalent Rh(1) atoms.
Ca3Rh2Ga3 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 10-coordinate geometry to three equivalent Rh(1), two equivalent Ga(1), and five equivalent Ga(2) atoms. There are a spread of Ca(1)-Rh(1) bond distances ranging from 3.06-3.25 Å. There is one shorter (3.17 Å) and one longer (3.25 Å) Ca(1)-Ga(1) bond length. There are a spread of Ca(1)-Ga(2) bond distances ranging from 3.13-3.44 Å. In the second Ca site, Ca(2) is bonded in a 9-coordinate geometry to four equivalent Rh(1), two equivalent Ga(2), and three equivalent Ga(1) atoms. There are two shorter (3.21 Å) and two longer (3.37 Å) Ca(2)-Rh(1) bond lengths. Both Ca(2)-Ga(2) bond lengths are 3.11 Å. There are a spread of Ca(2)-Ga(1) bond distances ranging from 2.96-3.39 Å. Rh(1) is bonded in a 4-coordinate geometry to two equivalent Ca(2), three equivalent Ca(1), one Ga(1), and three equivalent Ga(2) atoms. The Rh(1)-Ga(1) bond length is 2.53 Å. There are a spread of Rh(1)-Ga(2) bond distances ranging from 2.46-2.49 Å. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to three equivalent Ca(2), four equivalent Ca(1), and two equivalent Rh(1) atoms. In the second Ga site, Ga(2) is bonded in a 9-coordinate geometry to one Ca(2), five equivalent Ca(1), and three equivalent Rh(1) atoms.