Pt5ZnAs crystallizes in the tetragonal P4/mmm space group. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 4-coordinate geometry to two equivalent Pt(2), two equivalent Zn(1), and two equivalent As(1) atoms. In the second Pt site, Pt(2) is bonded to eight equivalent Pt(1) and four equivalent Zn(1) atoms to form distorted PtZn4Pt8 cuboctahedra that share corners with four equivalent Pt(2)Zn4Pt8 cuboctahedra, faces with four equivalent Pt(2)Zn4Pt8 cuboctahedra, and faces with four equivalent Zn(1)Pt12 cuboctahedra. Zn(1) is bonded to four equivalent Pt(2) and eight equivalent Pt(1) atoms to form ZnPt12 cuboctahedra that share corners with four equivalent Zn(1)Pt12 cuboctahedra, faces with four equivalent Pt(2)Zn4Pt8 cuboctahedra, and faces with four equivalent Zn(1)Pt12 cuboctahedra. As(1) is bonded in a body-centered cubic geometry to eight equivalent Pt(1) atoms.
Pt5ZnAs crystallizes in the tetragonal P4/mmm space group. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 4-coordinate geometry to two equivalent Pt(2), two equivalent Zn(1), and two equivalent As(1) atoms. Both Pt(1)-Pt(2) bond lengths are 2.78 Å. Both Pt(1)-Zn(1) bond lengths are 2.78 Å. Both Pt(1)-As(1) bond lengths are 2.54 Å. In the second Pt site, Pt(2) is bonded to eight equivalent Pt(1) and four equivalent Zn(1) atoms to form distorted PtZn4Pt8 cuboctahedra that share corners with four equivalent Pt(2)Zn4Pt8 cuboctahedra, faces with four equivalent Pt(2)Zn4Pt8 cuboctahedra, and faces with four equivalent Zn(1)Pt12 cuboctahedra. All Pt(2)-Zn(1) bond lengths are 2.78 Å. Zn(1) is bonded to four equivalent Pt(2) and eight equivalent Pt(1) atoms to form ZnPt12 cuboctahedra that share corners with four equivalent Zn(1)Pt12 cuboctahedra, faces with four equivalent Pt(2)Zn4Pt8 cuboctahedra, and faces with four equivalent Zn(1)Pt12 cuboctahedra. As(1) is bonded in a body-centered cubic geometry to eight equivalent Pt(1) atoms.