MnHgS2 is Enargite-like structured and crystallizes in the trigonal R3m space group. Mn(1) is bonded to one S(2) and three equivalent S(1) atoms to form MnS4 tetrahedra that share corners with six equivalent Mn(1)S4 tetrahedra and corners with six equivalent Hg(1)S4 tetrahedra. Hg(1) is bonded to one S(1) and three equivalent S(2) atoms to form HgS4 tetrahedra that share corners with six equivalent Mn(1)S4 tetrahedra and corners with six equivalent Hg(1)S4 tetrahedra. There are two inequivalent S sites. In the first S site, S(1) is bonded to three equivalent Mn(1) and one Hg(1) atom to form SMn3Hg tetrahedra that share corners with six equivalent S(1)Mn3Hg tetrahedra and corners with six equivalent S(2)MnHg3 tetrahedra. In the second S site, S(2) is bonded to one Mn(1) and three equivalent Hg(1) atoms to form SMnHg3 tetrahedra that share corners with six equivalent S(1)Mn3Hg tetrahedra and corners with six equivalent S(2)MnHg3 tetrahedra.
MnHgS2 is Enargite-like structured and crystallizes in the trigonal R3m space group. Mn(1) is bonded to one S(2) and three equivalent S(1) atoms to form MnS4 tetrahedra that share corners with six equivalent Mn(1)S4 tetrahedra and corners with six equivalent Hg(1)S4 tetrahedra. The Mn(1)-S(2) bond length is 2.39 Å. All Mn(1)-S(1) bond lengths are 2.47 Å. Hg(1) is bonded to one S(1) and three equivalent S(2) atoms to form HgS4 tetrahedra that share corners with six equivalent Mn(1)S4 tetrahedra and corners with six equivalent Hg(1)S4 tetrahedra. The Hg(1)-S(1) bond length is 2.57 Å. All Hg(1)-S(2) bond lengths are 2.58 Å. There are two inequivalent S sites. In the first S site, S(1) is bonded to three equivalent Mn(1) and one Hg(1) atom to form SMn3Hg tetrahedra that share corners with six equivalent S(1)Mn3Hg tetrahedra and corners with six equivalent S(2)MnHg3 tetrahedra. In the second S site, S(2) is bonded to one Mn(1) and three equivalent Hg(1) atoms to form SMnHg3 tetrahedra that share corners with six equivalent S(1)Mn3Hg tetrahedra and corners with six equivalent S(2)MnHg3 tetrahedra.