Pt5Bi8I2I crystallizes in the monoclinic C2/m space group. The structure consists of two hydriodic acid atoms inside a Pt5Bi8I2 framework. In the Pt5Bi8I2 framework, there are three inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 8-coordinate geometry to four equivalent Pt(2) and four equivalent Bi(1) atoms. In the second Pt site, Pt(2) is bonded in a 9-coordinate geometry to one Pt(3), two equivalent Pt(1), two equivalent Bi(1), two equivalent Bi(2), and two equivalent Bi(3) atoms. In the third Pt site, Pt(3) is bonded in a 8-coordinate geometry to one Pt(2), two equivalent Bi(2), two equivalent Bi(3), and three equivalent Bi(4) atoms. There are four inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 6-coordinate geometry to two equivalent Pt(1), two equivalent Pt(2), and two equivalent I(2) atoms. In the second Bi site, Bi(2) is bonded in a 4-coordinate geometry to two equivalent Pt(2), two equivalent Pt(3), and two equivalent I(2) atoms. In the third Bi site, Bi(3) is bonded in a 5-coordinate geometry to two equivalent Pt(2), two equivalent Pt(3), and one I(2) atom. In the fourth Bi site, Bi(4) is bonded in a distorted trigonal non-coplanar geometry to three equivalent Pt(3) atoms. I(2) is bonded in a distorted single-bond geometry to one Bi(3), two equivalent Bi(1), and two equivalent Bi(2) atoms.
Pt5Bi8I2I crystallizes in the monoclinic C2/m space group. The structure consists of two hydriodic acid atoms inside a Pt5Bi8I2 framework. In the Pt5Bi8I2 framework, there are three inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 8-coordinate geometry to four equivalent Pt(2) and four equivalent Bi(1) atoms. All Pt(1)-Pt(2) bond lengths are 2.83 Å. All Pt(1)-Bi(1) bond lengths are 2.88 Å. In the second Pt site, Pt(2) is bonded in a 9-coordinate geometry to one Pt(3), two equivalent Pt(1), two equivalent Bi(1), two equivalent Bi(2), and two equivalent Bi(3) atoms. The Pt(2)-Pt(3) bond length is 2.80 Å. There is one shorter (2.80 Å) and one longer (2.95 Å) Pt(2)-Bi(1) bond length. Both Pt(2)-Bi(2) bond lengths are 2.90 Å. Both Pt(2)-Bi(3) bond lengths are 2.87 Å. In the third Pt site, Pt(3) is bonded in a 8-coordinate geometry to one Pt(2), two equivalent Bi(2), two equivalent Bi(3), and three equivalent Bi(4) atoms. Both Pt(3)-Bi(2) bond lengths are 2.95 Å. Both Pt(3)-Bi(3) bond lengths are 3.08 Å. There are two shorter (2.81 Å) and one longer (2.84 Å) Pt(3)-Bi(4) bond length. There are four inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 6-coordinate geometry to two equivalent Pt(1), two equivalent Pt(2), and two equivalent I(2) atoms. Both Bi(1)-I(2) bond lengths are 3.60 Å. In the second Bi site, Bi(2) is bonded in a 4-coordinate geometry to two equivalent Pt(2), two equivalent Pt(3), and two equivalent I(2) atoms. Both Bi(2)-I(2) bond lengths are 3.61 Å. In the third Bi site, Bi(3) is bonded in a 5-coordinate geometry to two equivalent Pt(2), two equivalent Pt(3), and one I(2) atom. The Bi(3)-I(2) bond length is 3.46 Å. In the fourth Bi site, Bi(4) is bonded in a distorted trigonal non-coplanar geometry to three equivalent Pt(3) atoms. I(2) is bonded in a distorted single-bond geometry to one Bi(3), two equivalent Bi(1), and two equivalent Bi(2) atoms.