HfMnGa2 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Hf sites. In the first Hf site, Hf(1) is bonded in a 12-coordinate geometry to one Mn(2), three equivalent Mn(1), one Ga(4), one Ga(5), two equivalent Ga(1), two equivalent Ga(2), and two equivalent Ga(3) atoms. In the second Hf site, Hf(2) is bonded in a 7-coordinate geometry to one Ga(2), one Ga(3), one Ga(4), two equivalent Ga(1), and two equivalent Ga(5) atoms. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 6-coordinate geometry to three equivalent Hf(1), one Ga(2), one Ga(3), one Ga(4), one Ga(5), and two equivalent Ga(1) atoms. In the second Mn site, Mn(2) is bonded in a 6-coordinate geometry to two equivalent Hf(1), two equivalent Ga(1), two equivalent Ga(4), and two equivalent Ga(5) atoms. There are five inequivalent Ga sites. In the first Ga site, Ga(2) is bonded in a 11-coordinate geometry to one Hf(2), four equivalent Hf(1), two equivalent Mn(1), one Ga(3), one Ga(4), and two equivalent Ga(1) atoms. In the second Ga site, Ga(3) is bonded in a 11-coordinate geometry to one Hf(2), four equivalent Hf(1), two equivalent Mn(1), one Ga(2), one Ga(5), and two equivalent Ga(1) atoms. In the third Ga site, Ga(4) is bonded in a 7-coordinate geometry to one Hf(2), two equivalent Hf(1), two equivalent Mn(1), two equivalent Mn(2), and one Ga(2) atom. In the fourth Ga site, Ga(5) is bonded in a 8-coordinate geometry to two equivalent Hf(1), two equivalent Hf(2), two equivalent Mn(1), two equivalent Mn(2), and one Ga(3) atom. In the fifth Ga site, Ga(1) is bonded in a 6-coordinate geometry to one Hf(2), two equivalent Hf(1), one Mn(2), two equivalent Mn(1), one Ga(2), and one Ga(3) atom.
HfMnGa2 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Hf sites. In the first Hf site, Hf(1) is bonded in a 12-coordinate geometry to one Mn(2), three equivalent Mn(1), one Ga(4), one Ga(5), two equivalent Ga(1), two equivalent Ga(2), and two equivalent Ga(3) atoms. The Hf(1)-Mn(2) bond length is 3.03 Å. There are a spread of Hf(1)-Mn(1) bond distances ranging from 3.01-3.13 Å. The Hf(1)-Ga(4) bond length is 2.92 Å. The Hf(1)-Ga(5) bond length is 2.79 Å. Both Hf(1)-Ga(1) bond lengths are 2.86 Å. There is one shorter (2.92 Å) and one longer (3.03 Å) Hf(1)-Ga(2) bond length. There is one shorter (2.95 Å) and one longer (2.96 Å) Hf(1)-Ga(3) bond length. In the second Hf site, Hf(2) is bonded in a 7-coordinate geometry to one Ga(2), one Ga(3), one Ga(4), two equivalent Ga(1), and two equivalent Ga(5) atoms. The Hf(2)-Ga(2) bond length is 2.89 Å. The Hf(2)-Ga(3) bond length is 2.96 Å. The Hf(2)-Ga(4) bond length is 2.89 Å. Both Hf(2)-Ga(1) bond lengths are 2.78 Å. There is one shorter (2.90 Å) and one longer (2.97 Å) Hf(2)-Ga(5) bond length. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 6-coordinate geometry to three equivalent Hf(1), one Ga(2), one Ga(3), one Ga(4), one Ga(5), and two equivalent Ga(1) atoms. The Mn(1)-Ga(2) bond length is 2.49 Å. The Mn(1)-Ga(3) bond length is 2.51 Å. The Mn(1)-Ga(4) bond length is 2.69 Å. The Mn(1)-Ga(5) bond length is 2.58 Å. There is one shorter (2.44 Å) and one longer (2.46 Å) Mn(1)-Ga(1) bond length. In the second Mn site, Mn(2) is bonded in a 6-coordinate geometry to two equivalent Hf(1), two equivalent Ga(1), two equivalent Ga(4), and two equivalent Ga(5) atoms. Both Mn(2)-Ga(1) bond lengths are 2.48 Å. Both Mn(2)-Ga(4) bond lengths are 2.65 Å. Both Mn(2)-Ga(5) bond lengths are 2.56 Å. There are five inequivalent Ga sites. In the first Ga site, Ga(2) is bonded in a 11-coordinate geometry to one Hf(2), four equivalent Hf(1), two equivalent Mn(1), one Ga(3), one Ga(4), and two equivalent Ga(1) atoms. The Ga(2)-Ga(3) bond length is 2.58 Å. The Ga(2)-Ga(4) bond length is 2.96 Å. Both Ga(2)-Ga(1) bond lengths are 2.82 Å. In the second Ga site, Ga(3) is bonded in a 11-coordinate geometry to one Hf(2), four equivalent Hf(1), two equivalent Mn(1), one Ga(2), one Ga(5), and two equivalent Ga(1) atoms. The Ga(3)-Ga(5) bond length is 2.83 Å. Both Ga(3)-Ga(1) bond lengths are 2.94 Å. In the third Ga site, Ga(4) is bonded in a 7-coordinate geometry to one Hf(2), two equivalent Hf(1), two equivalent Mn(1), two equivalent Mn(2), and one Ga(2) atom. In the fourth Ga site, Ga(5) is bonded in a 8-coordinate geometry to two equivalent Hf(1), two equivalent Hf(2), two equivalent Mn(1), two equivalent Mn(2), and one Ga(3) atom. In the fifth Ga site, Ga(1) is bonded in a 6-coordinate geometry to one Hf(2), two equivalent Hf(1), one Mn(2), two equivalent Mn(1), one Ga(2), and one Ga(3) atom.