Materials Data on Tc3Pt by Materials Project
Tc3Pt is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. there are two inequivalent Tc+1.67- sites. In the first Tc+1.67- site, Tc+1.67- is bonded to eight Tc+1.67- and four equivalent Pt5+ atoms to form distorted TcTc8Pt4 cuboctahedra that share corners with four equivalent PtTc12 cuboctahedra, corners with fourteen TcTc8Pt4 cuboctahedra, edges with six equivalent PtTc12 cuboctahedra, edges with twelve TcTc8Pt4 cuboctahedra, faces with four equivalent PtTc12 cuboctahedra, and faces with sixteen TcTc8Pt4 cuboctahedra. There are a spread of Tc–Tc bond distances ranging from 2.65–2.91 Å. There are two shorter (2.77 Å) and two longer (2.78 Å) Tc–Pt bond lengths. In the second Tc+1.67- site, Tc+1.67- is bonded to eight Tc+1.67- and four equivalent Pt5+ atoms to form distorted TcTc8Pt4 cuboctahedra that share corners with four equivalent PtTc12 cuboctahedra, corners with fourteen TcTc8Pt4 cuboctahedra, edges with six equivalent PtTc12 cuboctahedra, edges with twelve TcTc8Pt4 cuboctahedra, faces with four equivalent PtTc12 cuboctahedra, and faces with sixteen TcTc8Pt4 cuboctahedra. Both Tc–Tc bond lengths are 2.68 Å. There are two shorter (2.77 Å) and two longer (2.78 Å) Tc–Pt bond lengths. Pt5+ is bonded to twelve Tc+1.67- atoms to form PtTc12 cuboctahedra that share corners with six equivalent PtTc12 cuboctahedra, corners with twelve TcTc8Pt4 cuboctahedra, edges with eighteen TcTc8Pt4 cuboctahedra, faces with eight equivalent PtTc12 cuboctahedra, and faces with twelve TcTc8Pt4 cuboctahedra.