Sm3Pt4 crystallizes in the trigonal R-3 space group. Sm(1) is bonded in a 9-coordinate geometry to one Pt(1), one Pt(2), and seven equivalent Pt(3) atoms. There are three inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 6-coordinate geometry to six equivalent Sm(1) atoms. In the second Pt site, Pt(2) is bonded in a distorted octahedral geometry to six equivalent Sm(1) atoms. In the third Pt site, Pt(3) is bonded in a 10-coordinate geometry to seven equivalent Sm(1) and three equivalent Pt(3) atoms.
Sm3Pt4 crystallizes in the trigonal R-3 space group. Sm(1) is bonded in a 9-coordinate geometry to one Pt(1), one Pt(2), and seven equivalent Pt(3) atoms. The Sm(1)-Pt(1) bond length is 2.92 Å. The Sm(1)-Pt(2) bond length is 2.99 Å. There are a spread of Sm(1)-Pt(3) bond distances ranging from 2.89-3.32 Å. There are three inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 6-coordinate geometry to six equivalent Sm(1) atoms. In the second Pt site, Pt(2) is bonded in a distorted octahedral geometry to six equivalent Sm(1) atoms. In the third Pt site, Pt(3) is bonded in a 10-coordinate geometry to seven equivalent Sm(1) and three equivalent Pt(3) atoms. There is one shorter (2.89 Å) and two longer (2.98 Å) Pt(3)-Pt(3) bond lengths.