Pt3W is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. W(1) is bonded to four equivalent Pt(2) and eight equivalent Pt(1) atoms to form WPt12 cuboctahedra that share corners with four equivalent W(1)Pt12 cuboctahedra, corners with eight equivalent Pt(2)Pt8W4 cuboctahedra, edges with eight equivalent W(1)Pt12 cuboctahedra, edges with sixteen equivalent Pt(1)Pt8W4 cuboctahedra, faces with four equivalent W(1)Pt12 cuboctahedra, faces with six equivalent Pt(2)Pt8W4 cuboctahedra, and faces with eight equivalent Pt(1)Pt8W4 cuboctahedra. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to four equivalent W(1), four equivalent Pt(1), and four equivalent Pt(2) atoms to form PtPt8W4 cuboctahedra that share corners with twelve equivalent Pt(1)Pt8W4 cuboctahedra, edges with eight equivalent W(1)Pt12 cuboctahedra, edges with eight equivalent Pt(1)Pt8W4 cuboctahedra, edges with eight equivalent Pt(2)Pt8W4 cuboctahedra, faces with four equivalent W(1)Pt12 cuboctahedra, faces with four equivalent Pt(2)Pt8W4 cuboctahedra, and faces with ten equivalent Pt(1)Pt8W4 cuboctahedra. In the second Pt site, Pt(2) is bonded to four equivalent W(1) and eight equivalent Pt(1) atoms to form PtPt8W4 cuboctahedra that share corners with four equivalent Pt(2)Pt8W4 cuboctahedra, corners with eight equivalent W(1)Pt12 cuboctahedra, edges with eight equivalent Pt(2)Pt8W4 cuboctahedra, edges with sixteen equivalent Pt(1)Pt8W4 cuboctahedra, faces with four equivalent Pt(2)Pt8W4 cuboctahedra, faces with six equivalent W(1)Pt12 cuboctahedra, and faces with eight equivalent Pt(1)Pt8W4 cuboctahedra.
Pt3W is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. W(1) is bonded to four equivalent Pt(2) and eight equivalent Pt(1) atoms to form WPt12 cuboctahedra that share corners with four equivalent W(1)Pt12 cuboctahedra, corners with eight equivalent Pt(2)Pt8W4 cuboctahedra, edges with eight equivalent W(1)Pt12 cuboctahedra, edges with sixteen equivalent Pt(1)Pt8W4 cuboctahedra, faces with four equivalent W(1)Pt12 cuboctahedra, faces with six equivalent Pt(2)Pt8W4 cuboctahedra, and faces with eight equivalent Pt(1)Pt8W4 cuboctahedra. All W(1)-Pt(2) bond lengths are 2.75 Å. All W(1)-Pt(1) bond lengths are 2.80 Å. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to four equivalent W(1), four equivalent Pt(1), and four equivalent Pt(2) atoms to form PtPt8W4 cuboctahedra that share corners with twelve equivalent Pt(1)Pt8W4 cuboctahedra, edges with eight equivalent W(1)Pt12 cuboctahedra, edges with eight equivalent Pt(1)Pt8W4 cuboctahedra, edges with eight equivalent Pt(2)Pt8W4 cuboctahedra, faces with four equivalent W(1)Pt12 cuboctahedra, faces with four equivalent Pt(2)Pt8W4 cuboctahedra, and faces with ten equivalent Pt(1)Pt8W4 cuboctahedra. All Pt(1)-Pt(1) bond lengths are 2.75 Å. All Pt(1)-Pt(2) bond lengths are 2.80 Å. In the second Pt site, Pt(2) is bonded to four equivalent W(1) and eight equivalent Pt(1) atoms to form PtPt8W4 cuboctahedra that share corners with four equivalent Pt(2)Pt8W4 cuboctahedra, corners with eight equivalent W(1)Pt12 cuboctahedra, edges with eight equivalent Pt(2)Pt8W4 cuboctahedra, edges with sixteen equivalent Pt(1)Pt8W4 cuboctahedra, faces with four equivalent Pt(2)Pt8W4 cuboctahedra, faces with six equivalent W(1)Pt12 cuboctahedra, and faces with eight equivalent Pt(1)Pt8W4 cuboctahedra.