HfCrCuS4 crystallizes in the orthorhombic Pnma space group. Hf(1) is bonded in a 6-coordinate geometry to one S(2), one S(3), and four equivalent S(1) atoms. Cr(1) is bonded to one S(2), two equivalent S(1), and two equivalent S(3) atoms to form distorted corner-sharing CrS5 trigonal bipyramids. Cu(1) is bonded in a rectangular see-saw-like geometry to one S(2), one S(3), and two equivalent S(1) atoms. There are three inequivalent S sites. In the first S site, S(1) is bonded to two equivalent Hf(1), one Cr(1), and one Cu(1) atom to form a mixture of distorted edge and corner-sharing SHf2CrCu trigonal pyramids. In the second S site, S(2) is bonded in a distorted T-shaped geometry to one Hf(1), one Cr(1), and one Cu(1) atom. In the third S site, S(3) is bonded in a rectangular see-saw-like geometry to one Hf(1), two equivalent Cr(1), and one Cu(1) atom.
HfCrCuS4 crystallizes in the orthorhombic Pnma space group. Hf(1) is bonded in a 6-coordinate geometry to one S(2), one S(3), and four equivalent S(1) atoms. The Hf(1)-S(2) bond length is 2.44 Å. The Hf(1)-S(3) bond length is 2.70 Å. There are two shorter (2.58 Å) and two longer (2.61 Å) Hf(1)-S(1) bond lengths. Cr(1) is bonded to one S(2), two equivalent S(1), and two equivalent S(3) atoms to form distorted corner-sharing CrS5 trigonal bipyramids. The Cr(1)-S(2) bond length is 2.42 Å. Both Cr(1)-S(1) bond lengths are 2.46 Å. There is one shorter (2.27 Å) and one longer (2.33 Å) Cr(1)-S(3) bond length. Cu(1) is bonded in a rectangular see-saw-like geometry to one S(2), one S(3), and two equivalent S(1) atoms. The Cu(1)-S(2) bond length is 2.27 Å. The Cu(1)-S(3) bond length is 2.57 Å. Both Cu(1)-S(1) bond lengths are 2.35 Å. There are three inequivalent S sites. In the first S site, S(1) is bonded to two equivalent Hf(1), one Cr(1), and one Cu(1) atom to form a mixture of distorted edge and corner-sharing SHf2CrCu trigonal pyramids. In the second S site, S(2) is bonded in a distorted T-shaped geometry to one Hf(1), one Cr(1), and one Cu(1) atom. In the third S site, S(3) is bonded in a rectangular see-saw-like geometry to one Hf(1), two equivalent Cr(1), and one Cu(1) atom.