Ca5Pt3 crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 6-coordinate geometry to two equivalent Pt(2) and four equivalent Pt(1) atoms. In the second Ca site, Ca(2) is bonded to four equivalent Pt(1) atoms to form distorted edge-sharing CaPt4 tetrahedra. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 10-coordinate geometry to two equivalent Ca(2) and eight equivalent Ca(1) atoms. In the second Pt site, Pt(2) is bonded in a 8-coordinate geometry to eight equivalent Ca(1) atoms.
Ca5Pt3 crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 6-coordinate geometry to two equivalent Pt(2) and four equivalent Pt(1) atoms. Both Ca(1)-Pt(2) bond lengths are 2.99 Å. There are a spread of Ca(1)-Pt(1) bond distances ranging from 3.06-3.45 Å. In the second Ca site, Ca(2) is bonded to four equivalent Pt(1) atoms to form distorted edge-sharing CaPt4 tetrahedra. All Ca(2)-Pt(1) bond lengths are 2.92 Å. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 10-coordinate geometry to two equivalent Ca(2) and eight equivalent Ca(1) atoms. In the second Pt site, Pt(2) is bonded in a 8-coordinate geometry to eight equivalent Ca(1) atoms.