Y(PtSi)2 crystallizes in the tetragonal P4/nmm space group. Y(1) is bonded in a 16-coordinate geometry to four equivalent Pt(1), four equivalent Pt(2), four equivalent Si(1), and four equivalent Si(2) atoms. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to four equivalent Y(1) and four equivalent Si(2) atoms to form distorted PtY4Si4 tetrahedra that share corners with twelve equivalent Si(1)Y4Pt4 tetrahedra, edges with two equivalent Si(1)Y4Pt4 tetrahedra, edges with four equivalent Pt(1)Y4Si4 tetrahedra, and faces with four equivalent Pt(1)Y4Si4 tetrahedra. In the second Pt site, Pt(2) is bonded in a 5-coordinate geometry to four equivalent Y(1), one Si(2), and four equivalent Si(1) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to four equivalent Y(1) and four equivalent Pt(2) atoms to form distorted SiY4Pt4 tetrahedra that share corners with twelve equivalent Pt(1)Y4Si4 tetrahedra, edges with two equivalent Pt(1)Y4Si4 tetrahedra, edges with four equivalent Si(1)Y4Pt4 tetrahedra, and faces with four equivalent Si(1)Y4Pt4 tetrahedra. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to four equivalent Y(1), one Pt(2), and four equivalent Pt(1) atoms.
Y(PtSi)2 crystallizes in the tetragonal P4/nmm space group. Y(1) is bonded in a 16-coordinate geometry to four equivalent Pt(1), four equivalent Pt(2), four equivalent Si(1), and four equivalent Si(2) atoms. All Y(1)-Pt(1) bond lengths are 3.26 Å. All Y(1)-Pt(2) bond lengths are 3.18 Å. All Y(1)-Si(1) bond lengths are 3.21 Å. All Y(1)-Si(2) bond lengths are 3.17 Å. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to four equivalent Y(1) and four equivalent Si(2) atoms to form distorted PtY4Si4 tetrahedra that share corners with twelve equivalent Si(1)Y4Pt4 tetrahedra, edges with two equivalent Si(1)Y4Pt4 tetrahedra, edges with four equivalent Pt(1)Y4Si4 tetrahedra, and faces with four equivalent Pt(1)Y4Si4 tetrahedra. All Pt(1)-Si(2) bond lengths are 2.47 Å. In the second Pt site, Pt(2) is bonded in a 5-coordinate geometry to four equivalent Y(1), one Si(2), and four equivalent Si(1) atoms. The Pt(2)-Si(2) bond length is 2.39 Å. All Pt(2)-Si(1) bond lengths are 2.42 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to four equivalent Y(1) and four equivalent Pt(2) atoms to form distorted SiY4Pt4 tetrahedra that share corners with twelve equivalent Pt(1)Y4Si4 tetrahedra, edges with two equivalent Pt(1)Y4Si4 tetrahedra, edges with four equivalent Si(1)Y4Pt4 tetrahedra, and faces with four equivalent Si(1)Y4Pt4 tetrahedra. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to four equivalent Y(1), one Pt(2), and four equivalent Pt(1) atoms.