K2TaAgS4 crystallizes in the triclinic P1 space group. There are four inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to one S(1), one S(4), one S(7), one S(8), two equivalent S(2), and two equivalent S(3) atoms. In the second K site, K(2) is bonded in a 6-coordinate geometry to one S(2), one S(3), one S(5), one S(6), one S(8), and two equivalent S(7) atoms. In the third K site, K(3) is bonded in a 6-coordinate geometry to one S(1), one S(2), one S(3), one S(5), one S(6), and two equivalent S(4) atoms. In the fourth K site, K(4) is bonded in a 6-coordinate geometry to one S(1), one S(4), one S(5), one S(7), one S(8), and two equivalent S(6) atoms. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a tetrahedral geometry to one S(1), one S(2), one S(3), and one S(4) atom. In the second Ta site, Ta(2) is bonded to one S(5), one S(6), one S(7), and one S(8) atom to form TaS4 tetrahedra that share edges with two equivalent Ag(2)S4 tetrahedra. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 4-coordinate geometry to one S(1), one S(2), one S(3), and one S(4) atom. In the second Ag site, Ag(2) is bonded to one S(5), one S(6), one S(7), and one S(8) atom to form distorted AgS4 tetrahedra that share edges with two equivalent Ta(2)S4 tetrahedra. There are eight inequivalent S sites. In the first S site, S(1) is bonded in a 5-coordinate geometry to one K(1), one K(3), one K(4), one Ta(1), and one Ag(1) atom. In the second S site, S(2) is bonded in a 6-coordinate geometry to one K(2), one K(3), two equivalent K(1), one Ta(1), and one Ag(1) atom. In the third S site, S(3) is bonded in a 6-coordinate geometry to one K(2), one K(3), two equivalent K(1), one Ta(1), and one Ag(1) atom. In the fourth S site, S(4) is bonded in a 6-coordinate geometry to one K(1), one K(4), two equivalent K(3), one Ta(1), and one Ag(1) atom. In the fifth S site, S(5) is bonded in a 5-coordinate geometry to one K(2), one K(3), one K(4), one Ta(2), and one Ag(2) atom. In the sixth S site, S(6) is bonded in a 6-coordinate geometry to one K(2), one K(3), two equivalent K(4), one Ta(2), and one Ag(2) atom. In the seventh S site, S(7) is bonded in a 6-coordinate geometry to one K(1), one K(4), two equivalent K(2), one Ta(2), and one Ag(2) atom. In the eighth S site, S(8) is bonded in a 5-coordinate geometry to one K(1), one K(2), one K(4), one Ta(2), and one Ag(2) atom.
K2TaAgS4 crystallizes in the triclinic P1 space group. There are four inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to one S(1), one S(4), one S(7), one S(8), two equivalent S(2), and two equivalent S(3) atoms. The K(1)-S(1) bond length is 3.51 Å. The K(1)-S(4) bond length is 3.60 Å. The K(1)-S(7) bond length is 3.42 Å. The K(1)-S(8) bond length is 3.43 Å. There is one shorter (3.49 Å) and one longer (3.74 Å) K(1)-S(2) bond length. There is one shorter (3.41 Å) and one longer (3.79 Å) K(1)-S(3) bond length. In the second K site, K(2) is bonded in a 6-coordinate geometry to one S(2), one S(3), one S(5), one S(6), one S(8), and two equivalent S(7) atoms. The K(2)-S(2) bond length is 3.41 Å. The K(2)-S(3) bond length is 3.34 Å. The K(2)-S(5) bond length is 3.59 Å. The K(2)-S(6) bond length is 3.60 Å. The K(2)-S(8) bond length is 3.36 Å. There is one shorter (3.51 Å) and one longer (3.75 Å) K(2)-S(7) bond length. In the third K site, K(3) is bonded in a 6-coordinate geometry to one S(1), one S(2), one S(3), one S(5), one S(6), and two equivalent S(4) atoms. The K(3)-S(1) bond length is 3.38 Å. The K(3)-S(2) bond length is 3.59 Å. The K(3)-S(3) bond length is 3.64 Å. The K(3)-S(5) bond length is 3.39 Å. The K(3)-S(6) bond length is 3.35 Å. There is one shorter (3.43 Å) and one longer (3.77 Å) K(3)-S(4) bond length. In the fourth K site, K(4) is bonded in a 6-coordinate geometry to one S(1), one S(4), one S(5), one S(7), one S(8), and two equivalent S(6) atoms. The K(4)-S(1) bond length is 3.41 Å. The K(4)-S(4) bond length is 3.32 Å. The K(4)-S(5) bond length is 3.45 Å. The K(4)-S(7) bond length is 3.62 Å. The K(4)-S(8) bond length is 3.55 Å. There is one shorter (3.50 Å) and one longer (3.75 Å) K(4)-S(6) bond length. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a tetrahedral geometry to one S(1), one S(2), one S(3), and one S(4) atom. The Ta(1)-S(1) bond length is 2.25 Å. The Ta(1)-S(2) bond length is 2.32 Å. The Ta(1)-S(3) bond length is 2.39 Å. The Ta(1)-S(4) bond length is 2.35 Å. In the second Ta site, Ta(2) is bonded to one S(5), one S(6), one S(7), and one S(8) atom to form TaS4 tetrahedra that share edges with two equivalent Ag(2)S4 tetrahedra. The Ta(2)-S(5) bond length is 2.37 Å. The Ta(2)-S(6) bond length is 2.26 Å. The Ta(2)-S(7) bond length is 2.28 Å. The Ta(2)-S(8) bond length is 2.32 Å. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 4-coordinate geometry to one S(1), one S(2), one S(3), and one S(4) atom. The Ag(1)-S(1) bond length is 2.62 Å. The Ag(1)-S(2) bond length is 2.53 Å. The Ag(1)-S(3) bond length is 2.62 Å. The Ag(1)-S(4) bond length is 2.61 Å. In the second Ag site, Ag(2) is bonded to one S(5), one S(6), one S(7), and one S(8) atom to form distorted AgS4 tetrahedra that share edges with two equivalent Ta(2)S4 tetrahedra. The Ag(2)-S(5) bond length is 2.50 Å. The Ag(2)-S(6) bond length is 2.57 Å. The Ag(2)-S(7) bond length is 2.55 Å. The Ag(2)-S(8) bond length is 2.61 Å. There are eight inequivalent S sites. In the first S site, S(1) is bonded in a 5-coordinate geometry to one K(1), one K(3), one K(4), one Ta(1), and one Ag(1) atom. In the second S site, S(2) is bonded in a 6-coordinate geometry to one K(2), one K(3), two equivalent K(1), one Ta(1), and one Ag(1) atom. In the third S site, S(3) is bonded in a 6-coordinate geometry to one K(2), one K(3), two equivalent K(1), one Ta(1), and one Ag(1) atom. In the fourth S site, S(4) is bonded in a 6-coordinate geometry to one K(1), one K(4), two equivalent K(3), one Ta(1), and one Ag(1) atom. In the fifth S site, S(5) is bonded in a 5-coordinate geometry to one K(2), one K(3), one K(4), one Ta(2), and one Ag(2) atom. In the sixth S site, S(6) is bonded in a 6-coordinate geometry to one K(2), one K(3), two equivalent K(4), one Ta(2), and one Ag(2) atom. In the seventh S site, S(7) is bonded in a 6-coordinate geometry to one K(1), one K(4), two equivalent K(2), one Ta(2), and one Ag(2) atom. In the eighth S site, S(8) is bonded in a 5-coordinate geometry to one K(1), one K(2), one K(4), one Ta(2), and one Ag(2) atom.