Ga5Pt crystallizes in the monoclinic P2_1/m space group. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 9-coordinate geometry to one Ga(11), one Ga(2), one Ga(3), one Ga(6), one Ga(7), one Ga(8), one Ga(9), and two equivalent Ga(5) atoms. In the second Pt site, Pt(2) is bonded in a 9-coordinate geometry to one Ga(1), one Ga(10), one Ga(4), one Ga(5), one Ga(7), one Ga(8), one Ga(9), and two equivalent Ga(6) atoms. There are eleven inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a distorted single-bond geometry to one Pt(2), one Ga(10), one Ga(3), one Ga(4), and one Ga(9) atom. In the second Ga site, Ga(9) is bonded in a 7-coordinate geometry to one Pt(1), one Pt(2), one Ga(1), one Ga(3), one Ga(4), one Ga(6), and one Ga(9) atom. In the third Ga site, Ga(2) is bonded in a distorted single-bond geometry to one Pt(1), one Ga(11), one Ga(3), and one Ga(4) atom. In the fourth Ga site, Ga(10) is bonded in a 7-coordinate geometry to two equivalent Pt(2), one Ga(11), two equivalent Ga(1), and two equivalent Ga(4) atoms. In the fifth Ga site, Ga(11) is bonded in a 7-coordinate geometry to two equivalent Pt(1), one Ga(10), two equivalent Ga(2), and two equivalent Ga(3) atoms. In the sixth Ga site, Ga(3) is bonded in a 9-coordinate geometry to one Pt(1), one Ga(1), one Ga(11), one Ga(2), one Ga(3), one Ga(6), one Ga(7), one Ga(8), and one Ga(9) atom. In the seventh Ga site, Ga(4) is bonded in a 9-coordinate geometry to one Pt(2), one Ga(1), one Ga(10), one Ga(2), one Ga(4), one Ga(5), one Ga(7), one Ga(8), and one Ga(9) atom. In the eighth Ga site, Ga(5) is bonded in a 3-coordinate geometry to one Pt(2), two equivalent Pt(1), and one Ga(4) atom. In the ninth Ga site, Ga(6) is bonded in a distorted trigonal non-coplanar geometry to one Pt(1), two equivalent Pt(2), one Ga(3), and one Ga(9) atom. In the tenth Ga site, Ga(7) is bonded in a 2-coordinate geometry to one Pt(1), one Pt(2), one Ga(3), and one Ga(4) atom. In the eleventh Ga site, Ga(8) is bonded in a 2-coordinate geometry to one Pt(1), one Pt(2), one Ga(3), and one Ga(4) atom.
Ga5Pt crystallizes in the monoclinic P2_1/m space group. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 9-coordinate geometry to one Ga(11), one Ga(2), one Ga(3), one Ga(6), one Ga(7), one Ga(8), one Ga(9), and two equivalent Ga(5) atoms. The Pt(1)-Ga(11) bond length is 2.63 Å. The Pt(1)-Ga(2) bond length is 2.60 Å. The Pt(1)-Ga(3) bond length is 2.62 Å. The Pt(1)-Ga(6) bond length is 2.76 Å. The Pt(1)-Ga(7) bond length is 2.62 Å. The Pt(1)-Ga(8) bond length is 2.62 Å. The Pt(1)-Ga(9) bond length is 2.62 Å. There is one shorter (2.56 Å) and one longer (2.79 Å) Pt(1)-Ga(5) bond length. In the second Pt site, Pt(2) is bonded in a 9-coordinate geometry to one Ga(1), one Ga(10), one Ga(4), one Ga(5), one Ga(7), one Ga(8), one Ga(9), and two equivalent Ga(6) atoms. The Pt(2)-Ga(1) bond length is 2.57 Å. The Pt(2)-Ga(10) bond length is 2.64 Å. The Pt(2)-Ga(4) bond length is 2.61 Å. The Pt(2)-Ga(5) bond length is 2.77 Å. The Pt(2)-Ga(7) bond length is 2.64 Å. The Pt(2)-Ga(8) bond length is 2.61 Å. The Pt(2)-Ga(9) bond length is 2.61 Å. There is one shorter (2.60 Å) and one longer (2.76 Å) Pt(2)-Ga(6) bond length. There are eleven inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a distorted single-bond geometry to one Pt(2), one Ga(10), one Ga(3), one Ga(4), and one Ga(9) atom. The Ga(1)-Ga(10) bond length is 2.80 Å. The Ga(1)-Ga(3) bond length is 2.65 Å. The Ga(1)-Ga(4) bond length is 2.62 Å. The Ga(1)-Ga(9) bond length is 2.93 Å. In the second Ga site, Ga(9) is bonded in a 7-coordinate geometry to one Pt(1), one Pt(2), one Ga(1), one Ga(3), one Ga(4), one Ga(6), and one Ga(9) atom. The Ga(9)-Ga(3) bond length is 2.89 Å. The Ga(9)-Ga(4) bond length is 2.92 Å. The Ga(9)-Ga(6) bond length is 2.78 Å. The Ga(9)-Ga(9) bond length is 2.52 Å. In the third Ga site, Ga(2) is bonded in a distorted single-bond geometry to one Pt(1), one Ga(11), one Ga(3), and one Ga(4) atom. The Ga(2)-Ga(11) bond length is 2.87 Å. The Ga(2)-Ga(3) bond length is 2.71 Å. The Ga(2)-Ga(4) bond length is 2.66 Å. In the fourth Ga site, Ga(10) is bonded in a 7-coordinate geometry to two equivalent Pt(2), one Ga(11), two equivalent Ga(1), and two equivalent Ga(4) atoms. The Ga(10)-Ga(11) bond length is 2.54 Å. Both Ga(10)-Ga(4) bond lengths are 2.93 Å. In the fifth Ga site, Ga(11) is bonded in a 7-coordinate geometry to two equivalent Pt(1), one Ga(10), two equivalent Ga(2), and two equivalent Ga(3) atoms. Both Ga(11)-Ga(3) bond lengths are 2.92 Å. In the sixth Ga site, Ga(3) is bonded in a 9-coordinate geometry to one Pt(1), one Ga(1), one Ga(11), one Ga(2), one Ga(3), one Ga(6), one Ga(7), one Ga(8), and one Ga(9) atom. The Ga(3)-Ga(3) bond length is 2.64 Å. The Ga(3)-Ga(6) bond length is 2.80 Å. The Ga(3)-Ga(7) bond length is 2.93 Å. The Ga(3)-Ga(8) bond length is 2.87 Å. In the seventh Ga site, Ga(4) is bonded in a 9-coordinate geometry to one Pt(2), one Ga(1), one Ga(10), one Ga(2), one Ga(4), one Ga(5), one Ga(7), one Ga(8), and one Ga(9) atom. The Ga(4)-Ga(4) bond length is 2.66 Å. The Ga(4)-Ga(5) bond length is 2.86 Å. The Ga(4)-Ga(7) bond length is 2.93 Å. The Ga(4)-Ga(8) bond length is 2.86 Å. In the eighth Ga site, Ga(5) is bonded in a 3-coordinate geometry to one Pt(2), two equivalent Pt(1), and one Ga(4) atom. In the ninth Ga site, Ga(6) is bonded in a distorted trigonal non-coplanar geometry to one Pt(1), two equivalent Pt(2), one Ga(3), and one Ga(9) atom. In the tenth Ga site, Ga(7) is bonded in a 2-coordinate geometry to one Pt(1), one Pt(2), one Ga(3), and one Ga(4) atom. In the eleventh Ga site, Ga(8) is bonded in a 2-coordinate geometry to one Pt(1), one Pt(2), one Ga(3), and one Ga(4) atom.