HfCrAgS4 crystallizes in the monoclinic Cm space group. Hf(1) is bonded to one S(1), one S(4), two equivalent S(2), and two equivalent S(3) atoms to form HfS6 octahedra that share corners with six equivalent Ag(1)S6 octahedra, edges with two equivalent Hf(1)S6 octahedra, edges with four equivalent Cr(1)S6 octahedra, and  a faceface with one Ag(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 48-55°. Cr(1) is bonded to one S(2), one S(3), two equivalent S(1), and two equivalent S(4) atoms to form CrS6 octahedra that share corners with six equivalent Ag(1)S6 octahedra, edges with two equivalent Cr(1)S6 octahedra, edges with four equivalent Hf(1)S6 octahedra, and  a faceface with one Ag(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 40-50°. Ag(1) is bonded to one S(1), one S(2), two equivalent S(3), and two equivalent S(4) atoms to form distorted AgS6 octahedra that share corners with six equivalent Hf(1)S6 octahedra, corners with six equivalent Cr(1)S6 octahedra, edges with two equivalent Ag(1)S6 octahedra,  a faceface with one Hf(1)S6 octahedra, and  a faceface with one Cr(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 40-55°. There are four inequivalent S sites. In the first S site, S(1) is bonded in a rectangular see-saw-like geometry to one Hf(1), two equivalent Cr(1), and one Ag(1) atom. In the second S site, S(2) is bonded in a rectangular see-saw-like geometry to two equivalent Hf(1), one Cr(1), and one Ag(1) atom. In the third S site, S(3) is bonded in a 5-coordinate geometry to two equivalent Hf(1), one Cr(1), and two equivalent Ag(1) atoms. In the fourth S site, S(4) is bonded to one Hf(1), two equivalent Cr(1), and two equivalent Ag(1) atoms to form distorted edge-sharing SHfCr2Ag2 trigonal bipyramids.
HfCrAgS4 crystallizes in the monoclinic Cm space group. Hf(1) is bonded to one S(1), one S(4), two equivalent S(2), and two equivalent S(3) atoms to form HfS6 octahedra that share corners with six equivalent Ag(1)S6 octahedra, edges with two equivalent Hf(1)S6 octahedra, edges with four equivalent Cr(1)S6 octahedra, and  a faceface with one Ag(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 48-55°. The Hf(1)-S(1) bond length is 2.50 Å. The Hf(1)-S(4) bond length is 2.58 Å. Both Hf(1)-S(2) bond lengths are 2.51 Å. Both Hf(1)-S(3) bond lengths are 2.58 Å. Cr(1) is bonded to one S(2), one S(3), two equivalent S(1), and two equivalent S(4) atoms to form CrS6 octahedra that share corners with six equivalent Ag(1)S6 octahedra, edges with two equivalent Cr(1)S6 octahedra, edges with four equivalent Hf(1)S6 octahedra, and  a faceface with one Ag(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 40-50°. The Cr(1)-S(2) bond length is 2.47 Å. The Cr(1)-S(3) bond length is 2.43 Å. Both Cr(1)-S(1) bond lengths are 2.44 Å. Both Cr(1)-S(4) bond lengths are 2.45 Å. Ag(1) is bonded to one S(1), one S(2), two equivalent S(3), and two equivalent S(4) atoms to form distorted AgS6 octahedra that share corners with six equivalent Hf(1)S6 octahedra, corners with six equivalent Cr(1)S6 octahedra, edges with two equivalent Ag(1)S6 octahedra,  a faceface with one Hf(1)S6 octahedra, and  a faceface with one Cr(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 40-55°. The Ag(1)-S(1) bond length is 2.69 Å. The Ag(1)-S(2) bond length is 2.78 Å. Both Ag(1)-S(3) bond lengths are 2.81 Å. Both Ag(1)-S(4) bond lengths are 2.75 Å. There are four inequivalent S sites. In the first S site, S(1) is bonded in a rectangular see-saw-like geometry to one Hf(1), two equivalent Cr(1), and one Ag(1) atom. In the second S site, S(2) is bonded in a rectangular see-saw-like geometry to two equivalent Hf(1), one Cr(1), and one Ag(1) atom. In the third S site, S(3) is bonded in a 5-coordinate geometry to two equivalent Hf(1), one Cr(1), and two equivalent Ag(1) atoms. In the fourth S site, S(4) is bonded to one Hf(1), two equivalent Cr(1), and two equivalent Ag(1) atoms to form distorted edge-sharing SHfCr2Ag2 trigonal bipyramids.