Tc3Pt is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Tc sites. In the first Tc site, Tc(1) is bonded to eight Tc(1,1) and four equivalent Pt(1) atoms to form distorted TcTc8Pt4 cuboctahedra that share corners with four equivalent Pt(1)Tc12 cuboctahedra; corners with fourteen Tc(1,1)Tc8Pt4 cuboctahedra; edges with six equivalent Pt(1)Tc12 cuboctahedra; edges with twelve Tc(1,1)Tc8Pt4 cuboctahedra; faces with four equivalent Pt(1)Tc12 cuboctahedra; and faces with sixteen Tc(1,1)Tc8Pt4 cuboctahedra. In the second Tc site, Tc(1) is bonded to eight Tc(1,1) and four equivalent Pt(1) atoms to form distorted TcTc8Pt4 cuboctahedra that share corners with four equivalent Pt(1)Tc12 cuboctahedra; corners with fourteen Tc(1,1)Tc8Pt4 cuboctahedra; edges with six equivalent Pt(1)Tc12 cuboctahedra; edges with twelve Tc(1,1)Tc8Pt4 cuboctahedra; faces with four equivalent Pt(1)Tc12 cuboctahedra; and faces with sixteen Tc(1,1)Tc8Pt4 cuboctahedra. Pt(1) is bonded to twelve Tc(1,1) atoms to form PtTc12 cuboctahedra that share corners with six equivalent Pt(1)Tc12 cuboctahedra; corners with twelve Tc(1,1)Tc8Pt4 cuboctahedra; edges with eighteen Tc(1,1)Tc8Pt4 cuboctahedra; faces with eight equivalent Pt(1)Tc12 cuboctahedra; and faces with twelve Tc(1,1)Tc8Pt4 cuboctahedra.
Tc3Pt is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Tc sites. In the first Tc site, Tc(1) is bonded to eight Tc(1,1) and four equivalent Pt(1) atoms to form distorted TcTc8Pt4 cuboctahedra that share corners with four equivalent Pt(1)Tc12 cuboctahedra; corners with fourteen Tc(1,1)Tc8Pt4 cuboctahedra; edges with six equivalent Pt(1)Tc12 cuboctahedra; edges with twelve Tc(1,1)Tc8Pt4 cuboctahedra; faces with four equivalent Pt(1)Tc12 cuboctahedra; and faces with sixteen Tc(1,1)Tc8Pt4 cuboctahedra. There are a spread of Tc(1)-Tc(1,1) bond distances ranging from 2.61-2.91 Å. All Tc(1)-Pt(1) bond lengths are 2.76 Å. In the second Tc site, Tc(1) is bonded to eight Tc(1,1) and four equivalent Pt(1) atoms to form distorted TcTc8Pt4 cuboctahedra that share corners with four equivalent Pt(1)Tc12 cuboctahedra; corners with fourteen Tc(1,1)Tc8Pt4 cuboctahedra; edges with six equivalent Pt(1)Tc12 cuboctahedra; edges with twelve Tc(1,1)Tc8Pt4 cuboctahedra; faces with four equivalent Pt(1)Tc12 cuboctahedra; and faces with sixteen Tc(1,1)Tc8Pt4 cuboctahedra. All Tc(1)-Tc(1) bond lengths are 2.65 Å. All Tc(1)-Pt(1) bond lengths are 2.76 Å. Pt(1) is bonded to twelve Tc(1,1) atoms to form PtTc12 cuboctahedra that share corners with six equivalent Pt(1)Tc12 cuboctahedra; corners with twelve Tc(1,1)Tc8Pt4 cuboctahedra; edges with eighteen Tc(1,1)Tc8Pt4 cuboctahedra; faces with eight equivalent Pt(1)Tc12 cuboctahedra; and faces with twelve Tc(1,1)Tc8Pt4 cuboctahedra.