Sr(Pt3B2)2 crystallizes in the trigonal P-3m1 space group. Sr(1) is bonded to twelve equivalent Pt(1) atoms to form edge-sharing SrPt12 cuboctahedra. Pt(1) is bonded in a 4-coordinate geometry to two equivalent Sr(1), two equivalent B(1), and two equivalent B(2) atoms. There are two inequivalent B sites. In the first B site, B(1) is bonded in a 7-coordinate geometry to six equivalent Pt(1) and one B(2) atom. In the second B site, B(2) is bonded in a 7-coordinate geometry to six equivalent Pt(1) and one B(1) atom.
Sr(Pt3B2)2 crystallizes in the trigonal P-3m1 space group. Sr(1) is bonded to twelve equivalent Pt(1) atoms to form edge-sharing SrPt12 cuboctahedra. All Sr(1)-Pt(1) bond lengths are 3.36 Å. Pt(1) is bonded in a 4-coordinate geometry to two equivalent Sr(1), two equivalent B(1), and two equivalent B(2) atoms. There is one shorter (2.18 Å) and one longer (2.34 Å) Pt(1)-B(1) bond length. There is one shorter (2.18 Å) and one longer (2.33 Å) Pt(1)-B(2) bond length. There are two inequivalent B sites. In the first B site, B(1) is bonded in a 7-coordinate geometry to six equivalent Pt(1) and one B(2) atom. The B(1)-B(2) bond length is 1.84 Å. In the second B site, B(2) is bonded in a 7-coordinate geometry to six equivalent Pt(1) and one B(1) atom.