Eu(RhGa4)2 crystallizes in the orthorhombic Pbam space group. Eu(1) is bonded in a 13-coordinate geometry to one Ga(2), two equivalent Ga(4), two equivalent Ga(5), two equivalent Ga(6), two equivalent Ga(7), two equivalent Ga(8), and two equivalent Ga(9) atoms. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 9-coordinate geometry to one Ga(2), one Ga(3), one Ga(4), two equivalent Ga(7), two equivalent Ga(8), and two equivalent Ga(9) atoms. In the second Rh site, Rh(2) is bonded in a 9-coordinate geometry to one Ga(4), two equivalent Ga(1), two equivalent Ga(3), two equivalent Ga(5), and two equivalent Ga(6) atoms. There are nine inequivalent Ga sites. In the first Ga site, Ga(9) is bonded in a 12-coordinate geometry to two equivalent Eu(1), two equivalent Rh(1), one Ga(5), one Ga(8), two equivalent Ga(2), two equivalent Ga(4), and two equivalent Ga(7) atoms. In the second Ga site, Ga(1) is bonded in a 4-coordinate geometry to four equivalent Rh(2) and two equivalent Ga(5) atoms. In the third Ga site, Ga(2) is bonded in a distorted linear geometry to two equivalent Eu(1), two equivalent Rh(1), and four equivalent Ga(9) atoms. In the fourth Ga site, Ga(3) is bonded in a 3-coordinate geometry to one Rh(1) and two equivalent Rh(2) atoms. In the fifth Ga site, Ga(4) is bonded in a distorted linear geometry to two equivalent Eu(1), one Rh(1), one Rh(2), two equivalent Ga(5), and two equivalent Ga(9) atoms. In the sixth Ga site, Ga(5) is bonded in a 10-coordinate geometry to two equivalent Eu(1), two equivalent Rh(2), one Ga(1), one Ga(6), one Ga(8), one Ga(9), and two equivalent Ga(4) atoms. In the seventh Ga site, Ga(6) is bonded in a 5-coordinate geometry to two equivalent Eu(1), two equivalent Rh(2), one Ga(5), and one Ga(7) atom. In the eighth Ga site, Ga(7) is bonded in a 2-coordinate geometry to two equivalent Eu(1), two equivalent Rh(1), one Ga(6), and two equivalent Ga(9) atoms. In the ninth Ga site, Ga(8) is bonded in a 2-coordinate geometry to two equivalent Eu(1), two equivalent Rh(1), one Ga(5), and one Ga(9) atom.
Eu(RhGa4)2 crystallizes in the orthorhombic Pbam space group. Eu(1) is bonded in a 13-coordinate geometry to one Ga(2), two equivalent Ga(4), two equivalent Ga(5), two equivalent Ga(6), two equivalent Ga(7), two equivalent Ga(8), and two equivalent Ga(9) atoms. The Eu(1)-Ga(2) bond length is 3.34 Å. There is one shorter (3.26 Å) and one longer (3.43 Å) Eu(1)-Ga(4) bond length. Both Eu(1)-Ga(5) bond lengths are 3.18 Å. Both Eu(1)-Ga(6) bond lengths are 3.18 Å. Both Eu(1)-Ga(7) bond lengths are 3.24 Å. Both Eu(1)-Ga(8) bond lengths are 3.23 Å. Both Eu(1)-Ga(9) bond lengths are 3.17 Å. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 9-coordinate geometry to one Ga(2), one Ga(3), one Ga(4), two equivalent Ga(7), two equivalent Ga(8), and two equivalent Ga(9) atoms. The Rh(1)-Ga(2) bond length is 2.42 Å. The Rh(1)-Ga(3) bond length is 2.48 Å. The Rh(1)-Ga(4) bond length is 2.41 Å. Both Rh(1)-Ga(7) bond lengths are 2.63 Å. Both Rh(1)-Ga(8) bond lengths are 2.64 Å. Both Rh(1)-Ga(9) bond lengths are 2.75 Å. In the second Rh site, Rh(2) is bonded in a 9-coordinate geometry to one Ga(4), two equivalent Ga(1), two equivalent Ga(3), two equivalent Ga(5), and two equivalent Ga(6) atoms. The Rh(2)-Ga(4) bond length is 2.38 Å. Both Rh(2)-Ga(1) bond lengths are 2.56 Å. There is one shorter (2.59 Å) and one longer (2.61 Å) Rh(2)-Ga(3) bond length. Both Rh(2)-Ga(5) bond lengths are 2.69 Å. Both Rh(2)-Ga(6) bond lengths are 2.69 Å. There are nine inequivalent Ga sites. In the first Ga site, Ga(9) is bonded in a 12-coordinate geometry to two equivalent Eu(1), two equivalent Rh(1), one Ga(5), one Ga(8), two equivalent Ga(2), two equivalent Ga(4), and two equivalent Ga(7) atoms. The Ga(9)-Ga(5) bond length is 2.84 Å. The Ga(9)-Ga(8) bond length is 2.87 Å. Both Ga(9)-Ga(2) bond lengths are 2.87 Å. Both Ga(9)-Ga(4) bond lengths are 2.89 Å. There is one shorter (2.86 Å) and one longer (3.00 Å) Ga(9)-Ga(7) bond length. In the second Ga site, Ga(1) is bonded in a 4-coordinate geometry to four equivalent Rh(2) and two equivalent Ga(5) atoms. Both Ga(1)-Ga(5) bond lengths are 2.79 Å. In the third Ga site, Ga(2) is bonded in a distorted linear geometry to two equivalent Eu(1), two equivalent Rh(1), and four equivalent Ga(9) atoms. In the fourth Ga site, Ga(3) is bonded in a 3-coordinate geometry to one Rh(1) and two equivalent Rh(2) atoms. In the fifth Ga site, Ga(4) is bonded in a distorted linear geometry to two equivalent Eu(1), one Rh(1), one Rh(2), two equivalent Ga(5), and two equivalent Ga(9) atoms. Both Ga(4)-Ga(5) bond lengths are 2.97 Å. In the sixth Ga site, Ga(5) is bonded in a 10-coordinate geometry to two equivalent Eu(1), two equivalent Rh(2), one Ga(1), one Ga(6), one Ga(8), one Ga(9), and two equivalent Ga(4) atoms. The Ga(5)-Ga(6) bond length is 2.89 Å. The Ga(5)-Ga(8) bond length is 2.66 Å. In the seventh Ga site, Ga(6) is bonded in a 5-coordinate geometry to two equivalent Eu(1), two equivalent Rh(2), one Ga(5), and one Ga(7) atom. The Ga(6)-Ga(7) bond length is 2.65 Å. In the eighth Ga site, Ga(7) is bonded in a 2-coordinate geometry to two equivalent Eu(1), two equivalent Rh(1), one Ga(6), and two equivalent Ga(9) atoms. In the ninth Ga site, Ga(8) is bonded in a 2-coordinate geometry to two equivalent Eu(1), two equivalent Rh(1), one Ga(5), and one Ga(9) atom.