NbCr3(AgS4)2 is Spinel-derived structured and crystallizes in the trigonal R-3m space group. Nb(1) is bonded to six equivalent S(1) atoms to form NbS6 octahedra that share corners with six equivalent Ag(1)S4 tetrahedra and edges with six equivalent Cr(1)S6 octahedra. Cr(1) is bonded to two equivalent S(2) and four equivalent S(1) atoms to form CrS6 octahedra that share corners with six equivalent Ag(1)S4 tetrahedra, edges with two equivalent Nb(1)S6 octahedra, and edges with four equivalent Cr(1)S6 octahedra. Ag(1) is bonded to one S(2) and three equivalent S(1) atoms to form AgS4 tetrahedra that share corners with three equivalent Nb(1)S6 octahedra and corners with nine equivalent Cr(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 59-61°. There are two inequivalent S sites. In the first S site, S(1) is bonded in a rectangular see-saw-like geometry to one Nb(1), two equivalent Cr(1), and one Ag(1) atom. In the second S site, S(2) is bonded to three equivalent Cr(1) and one Ag(1) atom to form corner-sharing SCr3Ag tetrahedra.
NbCr3(AgS4)2 is Spinel-derived structured and crystallizes in the trigonal R-3m space group. Nb(1) is bonded to six equivalent S(1) atoms to form NbS6 octahedra that share corners with six equivalent Ag(1)S4 tetrahedra and edges with six equivalent Cr(1)S6 octahedra. All Nb(1)-S(1) bond lengths are 2.49 Å. Cr(1) is bonded to two equivalent S(2) and four equivalent S(1) atoms to form CrS6 octahedra that share corners with six equivalent Ag(1)S4 tetrahedra, edges with two equivalent Nb(1)S6 octahedra, and edges with four equivalent Cr(1)S6 octahedra. Both Cr(1)-S(2) bond lengths are 2.42 Å. All Cr(1)-S(1) bond lengths are 2.43 Å. Ag(1) is bonded to one S(2) and three equivalent S(1) atoms to form AgS4 tetrahedra that share corners with three equivalent Nb(1)S6 octahedra and corners with nine equivalent Cr(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 59-61°. The Ag(1)-S(2) bond length is 2.46 Å. All Ag(1)-S(1) bond lengths are 2.48 Å. There are two inequivalent S sites. In the first S site, S(1) is bonded in a rectangular see-saw-like geometry to one Nb(1), two equivalent Cr(1), and one Ag(1) atom. In the second S site, S(2) is bonded to three equivalent Cr(1) and one Ag(1) atom to form corner-sharing SCr3Ag tetrahedra.