Zr5Pt3 crystallizes in the orthorhombic Cmcm space group. There are three inequivalent Zr sites. In the first Zr site, Zr(1) is bonded in a 6-coordinate geometry to two equivalent Pt(1) and four equivalent Pt(2) atoms. In the second Zr site, Zr(2) is bonded to two equivalent Pt(2) and three equivalent Pt(1) atoms to form a mixture of distorted corner and edge-sharing ZrPt5 trigonal bipyramids. In the third Zr site, Zr(3) is bonded to one Pt(1) and four equivalent Pt(2) atoms to form a mixture of distorted corner and edge-sharing ZrPt5 trigonal bipyramids. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 9-coordinate geometry to two equivalent Zr(3), three equivalent Zr(2), and four equivalent Zr(1) atoms. In the second Pt site, Pt(2) is bonded in a 9-coordinate geometry to one Zr(2), four equivalent Zr(1), and four equivalent Zr(3) atoms.
Zr5Pt3 crystallizes in the orthorhombic Cmcm space group. There are three inequivalent Zr sites. In the first Zr site, Zr(1) is bonded in a 6-coordinate geometry to two equivalent Pt(1) and four equivalent Pt(2) atoms. Both Zr(1)-Pt(1) bond lengths are 2.89 Å. All Zr(1)-Pt(2) bond lengths are 2.89 Å. In the second Zr site, Zr(2) is bonded to two equivalent Pt(2) and three equivalent Pt(1) atoms to form a mixture of distorted corner and edge-sharing ZrPt5 trigonal bipyramids. Both Zr(2)-Pt(2) bond lengths are 2.85 Å. There are two shorter (2.98 Å) and one longer (3.00 Å) Zr(2)-Pt(1) bond length. In the third Zr site, Zr(3) is bonded to one Pt(1) and four equivalent Pt(2) atoms to form a mixture of distorted corner and edge-sharing ZrPt5 trigonal bipyramids. The Zr(3)-Pt(1) bond length is 2.85 Å. There are a spread of Zr(3)-Pt(2) bond distances ranging from 2.85-2.99 Å. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 9-coordinate geometry to two equivalent Zr(3), three equivalent Zr(2), and four equivalent Zr(1) atoms. In the second Pt site, Pt(2) is bonded in a 9-coordinate geometry to one Zr(2), four equivalent Zr(1), and four equivalent Zr(3) atoms.