Cu10Hf7 crystallizes in the orthorhombic Cmce space group. There are four inequivalent Hf sites. In the first Hf site, Hf(1) is bonded in a 10-coordinate geometry to two equivalent Cu(3), four equivalent Cu(1), and four equivalent Cu(2) atoms. In the second Hf site, Hf(2) is bonded in a distorted body-centered cubic geometry to four equivalent Cu(1) and four equivalent Cu(2) atoms. In the third Hf site, Hf(3) is bonded in a 8-coordinate geometry to four equivalent Cu(1) and four equivalent Cu(2) atoms. In the fourth Hf site, Hf(4) is bonded in a 7-coordinate geometry to two equivalent Cu(2), three equivalent Cu(3), and four equivalent Cu(1) atoms. There are three inequivalent Cu sites. In the first Cu site, Cu(2) is bonded in a 6-coordinate geometry to one Hf(2), one Hf(4), two equivalent Hf(1), two equivalent Hf(3), one Cu(3), and two equivalent Cu(1) atoms. In the second Cu site, Cu(3) is bonded in a 10-coordinate geometry to two equivalent Hf(1), three equivalent Hf(4), one Cu(3), two equivalent Cu(1), and two equivalent Cu(2) atoms. In the third Cu site, Cu(1) is bonded in a 11-coordinate geometry to one Hf(2), two equivalent Hf(1), two equivalent Hf(3), two equivalent Hf(4), one Cu(1), one Cu(3), and two equivalent Cu(2) atoms.
Cu10Hf7 crystallizes in the orthorhombic Cmce space group. There are four inequivalent Hf sites. In the first Hf site, Hf(1) is bonded in a 10-coordinate geometry to two equivalent Cu(3), four equivalent Cu(1), and four equivalent Cu(2) atoms. Both Hf(1)-Cu(3) bond lengths are 2.72 Å. There are two shorter (2.78 Å) and two longer (2.81 Å) Hf(1)-Cu(1) bond lengths. There are two shorter (2.76 Å) and two longer (2.78 Å) Hf(1)-Cu(2) bond lengths. In the second Hf site, Hf(2) is bonded in a distorted body-centered cubic geometry to four equivalent Cu(1) and four equivalent Cu(2) atoms. All Hf(2)-Cu(1) bond lengths are 2.62 Å. All Hf(2)-Cu(2) bond lengths are 2.62 Å. In the third Hf site, Hf(3) is bonded in a 8-coordinate geometry to four equivalent Cu(1) and four equivalent Cu(2) atoms. There are two shorter (2.64 Å) and two longer (2.70 Å) Hf(3)-Cu(1) bond lengths. There are two shorter (2.61 Å) and two longer (2.75 Å) Hf(3)-Cu(2) bond lengths. In the fourth Hf site, Hf(4) is bonded in a 7-coordinate geometry to two equivalent Cu(2), three equivalent Cu(3), and four equivalent Cu(1) atoms. Both Hf(4)-Cu(2) bond lengths are 2.77 Å. There are a spread of Hf(4)-Cu(3) bond distances ranging from 2.67-2.83 Å. There are two shorter (2.78 Å) and two longer (3.26 Å) Hf(4)-Cu(1) bond lengths. There are three inequivalent Cu sites. In the first Cu site, Cu(2) is bonded in a 6-coordinate geometry to one Hf(2), one Hf(4), two equivalent Hf(1), two equivalent Hf(3), one Cu(3), and two equivalent Cu(1) atoms. The Cu(2)-Cu(3) bond length is 2.67 Å. There is one shorter (2.60 Å) and one longer (2.72 Å) Cu(2)-Cu(1) bond length. In the second Cu site, Cu(3) is bonded in a 10-coordinate geometry to two equivalent Hf(1), three equivalent Hf(4), one Cu(3), two equivalent Cu(1), and two equivalent Cu(2) atoms. The Cu(3)-Cu(3) bond length is 2.72 Å. Both Cu(3)-Cu(1) bond lengths are 2.68 Å. In the third Cu site, Cu(1) is bonded in a 11-coordinate geometry to one Hf(2), two equivalent Hf(1), two equivalent Hf(3), two equivalent Hf(4), one Cu(1), one Cu(3), and two equivalent Cu(2) atoms. The Cu(1)-Cu(1) bond length is 2.75 Å.