Pt3As is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Pt(1) is bonded to eight equivalent Pt(1) and four equivalent As(1) atoms to form PtAs4Pt8 cuboctahedra that share corners with four equivalent As(1)Pt12 cuboctahedra, corners with fourteen equivalent Pt(1)As4Pt8 cuboctahedra, edges with six equivalent As(1)Pt12 cuboctahedra, edges with twelve equivalent Pt(1)As4Pt8 cuboctahedra, faces with four equivalent As(1)Pt12 cuboctahedra, and faces with sixteen equivalent Pt(1)As4Pt8 cuboctahedra. As(1) is bonded to twelve equivalent Pt(1) atoms to form AsPt12 cuboctahedra that share corners with six equivalent As(1)Pt12 cuboctahedra, corners with twelve equivalent Pt(1)As4Pt8 cuboctahedra, edges with eighteen equivalent Pt(1)As4Pt8 cuboctahedra, faces with eight equivalent As(1)Pt12 cuboctahedra, and faces with twelve equivalent Pt(1)As4Pt8 cuboctahedra.
Pt3As is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Pt(1) is bonded to eight equivalent Pt(1) and four equivalent As(1) atoms to form PtAs4Pt8 cuboctahedra that share corners with four equivalent As(1)Pt12 cuboctahedra, corners with fourteen equivalent Pt(1)As4Pt8 cuboctahedra, edges with six equivalent As(1)Pt12 cuboctahedra, edges with twelve equivalent Pt(1)As4Pt8 cuboctahedra, faces with four equivalent As(1)Pt12 cuboctahedra, and faces with sixteen equivalent Pt(1)As4Pt8 cuboctahedra. There are a spread of Pt(1)-Pt(1) bond distances ranging from 2.79-2.88 Å. There are two shorter (2.79 Å) and two longer (2.88 Å) Pt(1)-As(1) bond lengths. As(1) is bonded to twelve equivalent Pt(1) atoms to form AsPt12 cuboctahedra that share corners with six equivalent As(1)Pt12 cuboctahedra, corners with twelve equivalent Pt(1)As4Pt8 cuboctahedra, edges with eighteen equivalent Pt(1)As4Pt8 cuboctahedra, faces with eight equivalent As(1)Pt12 cuboctahedra, and faces with twelve equivalent Pt(1)As4Pt8 cuboctahedra.