YbPtGe2 crystallizes in the monoclinic Cm space group. There are three inequivalent Yb sites. In the first Yb site, Yb(1) is bonded in a 15-coordinate geometry to two equivalent Pt(1), four equivalent Pt(2), one Ge(5), two equivalent Ge(1), two equivalent Ge(3), and four equivalent Ge(4) atoms. In the second Yb site, Yb(2) is bonded in a 15-coordinate geometry to two equivalent Pt(2), four equivalent Pt(1), one Ge(6), two equivalent Ge(2), two equivalent Ge(4), and four equivalent Ge(3) atoms. In the third Yb site, Yb(3) is bonded in a 14-coordinate geometry to two equivalent Pt(1), two equivalent Pt(2), one Ge(3), one Ge(4), two equivalent Ge(1), two equivalent Ge(2), two equivalent Ge(5), and two equivalent Ge(6) atoms. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 10-coordinate geometry to one Yb(1), two equivalent Yb(2), two equivalent Yb(3), one Ge(2), one Ge(3), one Ge(5), and two equivalent Ge(4) atoms. In the second Pt site, Pt(2) is bonded in a 10-coordinate geometry to one Yb(2), two equivalent Yb(1), two equivalent Yb(3), one Ge(1), one Ge(4), one Ge(6), and two equivalent Ge(3) atoms. There are six inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to two equivalent Yb(1), four equivalent Yb(3), two equivalent Pt(2), and one Ge(2) atom. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Yb(2), four equivalent Yb(3), two equivalent Pt(1), and one Ge(1) atom. In the third Ge site, Ge(3) is bonded in a 8-coordinate geometry to one Yb(1), one Yb(3), two equivalent Yb(2), one Pt(1), two equivalent Pt(2), and one Ge(3) atom. In the fourth Ge site, Ge(4) is bonded in a 8-coordinate geometry to one Yb(2), one Yb(3), two equivalent Yb(1), one Pt(2), two equivalent Pt(1), and one Ge(4) atom. In the fifth Ge site, Ge(5) is bonded in a 2-coordinate geometry to one Yb(1), four equivalent Yb(3), and two equivalent Pt(1) atoms. In the sixth Ge site, Ge(6) is bonded in a 2-coordinate geometry to one Yb(2), four equivalent Yb(3), and two equivalent Pt(2) atoms.
YbPtGe2 crystallizes in the monoclinic Cm space group. There are three inequivalent Yb sites. In the first Yb site, Yb(1) is bonded in a 15-coordinate geometry to two equivalent Pt(1), four equivalent Pt(2), one Ge(5), two equivalent Ge(1), two equivalent Ge(3), and four equivalent Ge(4) atoms. Both Yb(1)-Pt(1) bond lengths are 3.26 Å. All Yb(1)-Pt(2) bond lengths are 3.21 Å. The Yb(1)-Ge(5) bond length is 3.53 Å. Both Yb(1)-Ge(1) bond lengths are 3.00 Å. Both Yb(1)-Ge(3) bond lengths are 3.09 Å. All Yb(1)-Ge(4) bond lengths are 2.97 Å. In the second Yb site, Yb(2) is bonded in a 15-coordinate geometry to two equivalent Pt(2), four equivalent Pt(1), one Ge(6), two equivalent Ge(2), two equivalent Ge(4), and four equivalent Ge(3) atoms. Both Yb(2)-Pt(2) bond lengths are 3.26 Å. All Yb(2)-Pt(1) bond lengths are 3.21 Å. The Yb(2)-Ge(6) bond length is 3.53 Å. Both Yb(2)-Ge(2) bond lengths are 3.00 Å. Both Yb(2)-Ge(4) bond lengths are 3.09 Å. All Yb(2)-Ge(3) bond lengths are 2.97 Å. In the third Yb site, Yb(3) is bonded in a 14-coordinate geometry to two equivalent Pt(1), two equivalent Pt(2), one Ge(3), one Ge(4), two equivalent Ge(1), two equivalent Ge(2), two equivalent Ge(5), and two equivalent Ge(6) atoms. There is one shorter (3.20 Å) and one longer (3.21 Å) Yb(3)-Pt(1) bond length. Both Yb(3)-Pt(2) bond lengths are 3.20 Å. The Yb(3)-Ge(3) bond length is 3.32 Å. The Yb(3)-Ge(4) bond length is 3.32 Å. Both Yb(3)-Ge(1) bond lengths are 3.29 Å. There is one shorter (3.29 Å) and one longer (3.30 Å) Yb(3)-Ge(2) bond length. Both Yb(3)-Ge(5) bond lengths are 3.33 Å. There is one shorter (3.32 Å) and one longer (3.34 Å) Yb(3)-Ge(6) bond length. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 10-coordinate geometry to one Yb(1), two equivalent Yb(2), two equivalent Yb(3), one Ge(2), one Ge(3), one Ge(5), and two equivalent Ge(4) atoms. The Pt(1)-Ge(2) bond length is 2.47 Å. The Pt(1)-Ge(3) bond length is 2.62 Å. The Pt(1)-Ge(5) bond length is 2.49 Å. Both Pt(1)-Ge(4) bond lengths are 2.49 Å. In the second Pt site, Pt(2) is bonded in a 10-coordinate geometry to one Yb(2), two equivalent Yb(1), two equivalent Yb(3), one Ge(1), one Ge(4), one Ge(6), and two equivalent Ge(3) atoms. The Pt(2)-Ge(1) bond length is 2.48 Å. The Pt(2)-Ge(4) bond length is 2.62 Å. The Pt(2)-Ge(6) bond length is 2.49 Å. Both Pt(2)-Ge(3) bond lengths are 2.49 Å. There are six inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to two equivalent Yb(1), four equivalent Yb(3), two equivalent Pt(2), and one Ge(2) atom. The Ge(1)-Ge(2) bond length is 2.38 Å. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Yb(2), four equivalent Yb(3), two equivalent Pt(1), and one Ge(1) atom. In the third Ge site, Ge(3) is bonded in a 8-coordinate geometry to one Yb(1), one Yb(3), two equivalent Yb(2), one Pt(1), two equivalent Pt(2), and one Ge(3) atom. The Ge(3)-Ge(3) bond length is 2.62 Å. In the fourth Ge site, Ge(4) is bonded in a 8-coordinate geometry to one Yb(2), one Yb(3), two equivalent Yb(1), one Pt(2), two equivalent Pt(1), and one Ge(4) atom. The Ge(4)-Ge(4) bond length is 2.62 Å. In the fifth Ge site, Ge(5) is bonded in a 2-coordinate geometry to one Yb(1), four equivalent Yb(3), and two equivalent Pt(1) atoms. In the sixth Ge site, Ge(6) is bonded in a 2-coordinate geometry to one Yb(2), four equivalent Yb(3), and two equivalent Pt(2) atoms.