K2VAgSe4 crystallizes in the triclinic P1 space group. There are four inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to one Se(2), one Se(4), one Se(5), one Se(7), two equivalent Se(1), and two equivalent Se(3) atoms. In the second K site, K(2) is bonded in a 6-coordinate geometry to one Se(1), one Se(3), one Se(6), one Se(8), two equivalent Se(4), and two equivalent Se(5) atoms. In the third K site, K(3) is bonded in a 6-coordinate geometry to one Se(1), one Se(3), one Se(6), one Se(8), two equivalent Se(2), and two equivalent Se(7) atoms. In the fourth K site, K(4) is bonded in a 7-coordinate geometry to one Se(2), one Se(4), one Se(5), one Se(7), two equivalent Se(6), and two equivalent Se(8) atoms. There are two inequivalent V sites. In the first V site, V(1) is bonded to one Se(2), one Se(6), one Se(7), and one Se(8) atom to form VSe4 tetrahedra that share edges with two equivalent Ag(1)Se4 tetrahedra. In the second V site, V(2) is bonded in a tetrahedral geometry to one Se(1), one Se(3), one Se(4), and one Se(5) atom. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded to one Se(2), one Se(6), one Se(7), and one Se(8) atom to form distorted AgSe4 tetrahedra that share edges with two equivalent V(1)Se4 tetrahedra. In the second Ag site, Ag(2) is bonded in a 4-coordinate geometry to one Se(1), one Se(3), one Se(4), and one Se(5) atom. There are eight inequivalent Se sites. In the first Se site, Se(1) is bonded in a 6-coordinate geometry to one K(2), one K(3), two equivalent K(1), one V(2), and one Ag(2) atom. In the second Se site, Se(2) is bonded in a 6-coordinate geometry to one K(1), one K(4), two equivalent K(3), one V(1), and one Ag(1) atom. In the third Se site, Se(3) is bonded in a 6-coordinate geometry to one K(2), one K(3), two equivalent K(1), one V(2), and one Ag(2) atom. In the fourth Se site, Se(4) is bonded in a 6-coordinate geometry to one K(1), one K(4), two equivalent K(2), one V(2), and one Ag(2) atom. In the fifth Se site, Se(5) is bonded in a 6-coordinate geometry to one K(1), one K(4), two equivalent K(2), one V(2), and one Ag(2) atom. In the sixth Se site, Se(6) is bonded in a 6-coordinate geometry to one K(2), one K(3), two equivalent K(4), one V(1), and one Ag(1) atom. In the seventh Se site, Se(7) is bonded in a 6-coordinate geometry to one K(1), one K(4), two equivalent K(3), one V(1), and one Ag(1) atom. In the eighth Se site, Se(8) is bonded in a 6-coordinate geometry to one K(2), one K(3), two equivalent K(4), one V(1), and one Ag(1) atom.
K2VAgSe4 crystallizes in the triclinic P1 space group. There are four inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to one Se(2), one Se(4), one Se(5), one Se(7), two equivalent Se(1), and two equivalent Se(3) atoms. The K(1)-Se(2) bond length is 3.39 Å. The K(1)-Se(4) bond length is 3.62 Å. The K(1)-Se(5) bond length is 3.68 Å. The K(1)-Se(7) bond length is 3.42 Å. There is one shorter (3.46 Å) and one longer (3.87 Å) K(1)-Se(1) bond length. There is one shorter (3.45 Å) and one longer (3.77 Å) K(1)-Se(3) bond length. In the second K site, K(2) is bonded in a 6-coordinate geometry to one Se(1), one Se(3), one Se(6), one Se(8), two equivalent Se(4), and two equivalent Se(5) atoms. The K(2)-Se(1) bond length is 3.59 Å. The K(2)-Se(3) bond length is 3.61 Å. The K(2)-Se(6) bond length is 3.49 Å. The K(2)-Se(8) bond length is 3.45 Å. There is one shorter (3.37 Å) and one longer (3.86 Å) K(2)-Se(4) bond length. There is one shorter (3.48 Å) and one longer (3.83 Å) K(2)-Se(5) bond length. In the third K site, K(3) is bonded in a 6-coordinate geometry to one Se(1), one Se(3), one Se(6), one Se(8), two equivalent Se(2), and two equivalent Se(7) atoms. The K(3)-Se(1) bond length is 3.52 Å. The K(3)-Se(3) bond length is 3.44 Å. The K(3)-Se(6) bond length is 3.59 Å. The K(3)-Se(8) bond length is 3.64 Å. There is one shorter (3.37 Å) and one longer (3.83 Å) K(3)-Se(2) bond length. There is one shorter (3.44 Å) and one longer (3.88 Å) K(3)-Se(7) bond length. In the fourth K site, K(4) is bonded in a 7-coordinate geometry to one Se(2), one Se(4), one Se(5), one Se(7), two equivalent Se(6), and two equivalent Se(8) atoms. The K(4)-Se(2) bond length is 3.61 Å. The K(4)-Se(4) bond length is 3.47 Å. The K(4)-Se(5) bond length is 3.41 Å. The K(4)-Se(7) bond length is 3.66 Å. There is one shorter (3.42 Å) and one longer (3.88 Å) K(4)-Se(6) bond length. There is one shorter (3.51 Å) and one longer (3.78 Å) K(4)-Se(8) bond length. There are two inequivalent V sites. In the first V site, V(1) is bonded to one Se(2), one Se(6), one Se(7), and one Se(8) atom to form VSe4 tetrahedra that share edges with two equivalent Ag(1)Se4 tetrahedra. The V(1)-Se(2) bond length is 2.30 Å. The V(1)-Se(6) bond length is 2.32 Å. The V(1)-Se(7) bond length is 2.34 Å. The V(1)-Se(8) bond length is 2.40 Å. In the second V site, V(2) is bonded in a tetrahedral geometry to one Se(1), one Se(3), one Se(4), and one Se(5) atom. The V(2)-Se(1) bond length is 2.29 Å. The V(2)-Se(3) bond length is 2.38 Å. The V(2)-Se(4) bond length is 2.35 Å. The V(2)-Se(5) bond length is 2.35 Å. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded to one Se(2), one Se(6), one Se(7), and one Se(8) atom to form distorted AgSe4 tetrahedra that share edges with two equivalent V(1)Se4 tetrahedra. The Ag(1)-Se(2) bond length is 2.65 Å. The Ag(1)-Se(6) bond length is 2.58 Å. The Ag(1)-Se(7) bond length is 2.67 Å. The Ag(1)-Se(8) bond length is 2.64 Å. In the second Ag site, Ag(2) is bonded in a 4-coordinate geometry to one Se(1), one Se(3), one Se(4), and one Se(5) atom. The Ag(2)-Se(1) bond length is 2.54 Å. The Ag(2)-Se(3) bond length is 2.68 Å. The Ag(2)-Se(4) bond length is 2.67 Å. The Ag(2)-Se(5) bond length is 2.63 Å. There are eight inequivalent Se sites. In the first Se site, Se(1) is bonded in a 6-coordinate geometry to one K(2), one K(3), two equivalent K(1), one V(2), and one Ag(2) atom. In the second Se site, Se(2) is bonded in a 6-coordinate geometry to one K(1), one K(4), two equivalent K(3), one V(1), and one Ag(1) atom. In the third Se site, Se(3) is bonded in a 6-coordinate geometry to one K(2), one K(3), two equivalent K(1), one V(2), and one Ag(2) atom. In the fourth Se site, Se(4) is bonded in a 6-coordinate geometry to one K(1), one K(4), two equivalent K(2), one V(2), and one Ag(2) atom. In the fifth Se site, Se(5) is bonded in a 6-coordinate geometry to one K(1), one K(4), two equivalent K(2), one V(2), and one Ag(2) atom. In the sixth Se site, Se(6) is bonded in a 6-coordinate geometry to one K(2), one K(3), two equivalent K(4), one V(1), and one Ag(1) atom. In the seventh Se site, Se(7) is bonded in a 6-coordinate geometry to one K(1), one K(4), two equivalent K(3), one V(1), and one Ag(1) atom. In the eighth Se site, Se(8) is bonded in a 6-coordinate geometry to one K(2), one K(3), two equivalent K(4), one V(1), and one Ag(1) atom.