Yb2Pt3Sn5 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Yb sites. In the first Yb site, Yb(1) is bonded in a 8-coordinate geometry to two equivalent Pt(2), two equivalent Sn(3), two equivalent Sn(4), and two equivalent Sn(5) atoms. In the second Yb site, Yb(2) is bonded in a 13-coordinate geometry to one Pt(2), four equivalent Pt(1), two equivalent Sn(1), two equivalent Sn(4), and four equivalent Sn(2) atoms. There are three inequivalent Pt sites. In the first Pt site, Pt(3) is bonded in a 7-coordinate geometry to one Sn(1), three equivalent Sn(3), and three equivalent Sn(5) atoms. In the second Pt site, Pt(1) is bonded in a 9-coordinate geometry to four equivalent Yb(2), one Sn(1), two equivalent Sn(2), and two equivalent Sn(4) atoms. In the third Pt site, Pt(2) is bonded in a 9-coordinate geometry to one Yb(2), two equivalent Yb(1), one Sn(3), one Sn(4), two equivalent Sn(1), and two equivalent Sn(2) atoms. There are five inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 4-coordinate geometry to two equivalent Yb(2), one Pt(1), one Pt(3), and two equivalent Pt(2) atoms. In the second Sn site, Sn(2) is bonded in a 6-coordinate geometry to four equivalent Yb(2), two equivalent Pt(1), and two equivalent Pt(2) atoms. In the third Sn site, Sn(3) is bonded in a 6-coordinate geometry to two equivalent Yb(1), one Pt(2), and three equivalent Pt(3) atoms. In the fourth Sn site, Sn(4) is bonded in a 8-coordinate geometry to two equivalent Yb(1), two equivalent Yb(2), one Pt(2), two equivalent Pt(1), and one Sn(5) atom. In the fifth Sn site, Sn(5) is bonded in a 5-coordinate geometry to two equivalent Yb(1), three equivalent Pt(3), and one Sn(4) atom.
Yb2Pt3Sn5 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Yb sites. In the first Yb site, Yb(1) is bonded in a 8-coordinate geometry to two equivalent Pt(2), two equivalent Sn(3), two equivalent Sn(4), and two equivalent Sn(5) atoms. Both Yb(1)-Pt(2) bond lengths are 3.19 Å. Both Yb(1)-Sn(3) bond lengths are 3.18 Å. Both Yb(1)-Sn(4) bond lengths are 3.21 Å. Both Yb(1)-Sn(5) bond lengths are 3.20 Å. In the second Yb site, Yb(2) is bonded in a 13-coordinate geometry to one Pt(2), four equivalent Pt(1), two equivalent Sn(1), two equivalent Sn(4), and four equivalent Sn(2) atoms. The Yb(2)-Pt(2) bond length is 2.89 Å. There are two shorter (3.13 Å) and two longer (3.34 Å) Yb(2)-Pt(1) bond lengths. Both Yb(2)-Sn(1) bond lengths are 3.36 Å. There is one shorter (3.30 Å) and one longer (3.39 Å) Yb(2)-Sn(4) bond length. There are two shorter (3.14 Å) and two longer (3.38 Å) Yb(2)-Sn(2) bond lengths. There are three inequivalent Pt sites. In the first Pt site, Pt(3) is bonded in a 7-coordinate geometry to one Sn(1), three equivalent Sn(3), and three equivalent Sn(5) atoms. The Pt(3)-Sn(1) bond length is 2.77 Å. There are two shorter (2.77 Å) and one longer (2.86 Å) Pt(3)-Sn(3) bond length. There are two shorter (2.75 Å) and one longer (2.78 Å) Pt(3)-Sn(5) bond length. In the second Pt site, Pt(1) is bonded in a 9-coordinate geometry to four equivalent Yb(2), one Sn(1), two equivalent Sn(2), and two equivalent Sn(4) atoms. The Pt(1)-Sn(1) bond length is 2.79 Å. There is one shorter (2.71 Å) and one longer (2.79 Å) Pt(1)-Sn(2) bond length. Both Pt(1)-Sn(4) bond lengths are 2.65 Å. In the third Pt site, Pt(2) is bonded in a 9-coordinate geometry to one Yb(2), two equivalent Yb(1), one Sn(3), one Sn(4), two equivalent Sn(1), and two equivalent Sn(2) atoms. The Pt(2)-Sn(3) bond length is 2.70 Å. The Pt(2)-Sn(4) bond length is 2.73 Å. Both Pt(2)-Sn(1) bond lengths are 2.90 Å. Both Pt(2)-Sn(2) bond lengths are 2.79 Å. There are five inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 4-coordinate geometry to two equivalent Yb(2), one Pt(1), one Pt(3), and two equivalent Pt(2) atoms. In the second Sn site, Sn(2) is bonded in a 6-coordinate geometry to four equivalent Yb(2), two equivalent Pt(1), and two equivalent Pt(2) atoms. In the third Sn site, Sn(3) is bonded in a 6-coordinate geometry to two equivalent Yb(1), one Pt(2), and three equivalent Pt(3) atoms. In the fourth Sn site, Sn(4) is bonded in a 8-coordinate geometry to two equivalent Yb(1), two equivalent Yb(2), one Pt(2), two equivalent Pt(1), and one Sn(5) atom. The Sn(4)-Sn(5) bond length is 3.04 Å. In the fifth Sn site, Sn(5) is bonded in a 5-coordinate geometry to two equivalent Yb(1), three equivalent Pt(3), and one Sn(4) atom.