Rb2VAgSe4 crystallizes in the triclinic P1 space group. There are four inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 8-coordinate geometry to one Se(2), one Se(4), one Se(5), one Se(8), two equivalent Se(3), and two equivalent Se(7) atoms. In the second Rb site, Rb(2) is bonded in a 8-coordinate geometry to one Se(1), one Se(3), one Se(6), one Se(7), two equivalent Se(4), and two equivalent Se(8) atoms. In the third Rb site, Rb(3) is bonded in a 8-coordinate geometry to one Se(2), one Se(4), one Se(5), one Se(8), two equivalent Se(1), and two equivalent Se(6) atoms. In the fourth Rb site, Rb(4) is bonded in a 8-coordinate geometry to one Se(1), one Se(3), one Se(6), one Se(7), two equivalent Se(2), and two equivalent Se(5) atoms. There are two inequivalent V sites. In the first V site, V(1) is bonded in a tetrahedral geometry to one Se(3), one Se(4), one Se(7), and one Se(8) atom. In the second V site, V(2) is bonded in a tetrahedral geometry to one Se(1), one Se(2), one Se(5), and one Se(6) atom. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 4-coordinate geometry to one Se(3), one Se(4), one Se(7), and one Se(8) atom. In the second Ag site, Ag(2) is bonded in a 4-coordinate geometry to one Se(1), one Se(2), one Se(5), and one Se(6) atom. There are eight inequivalent Se sites. In the first Se site, Se(1) is bonded in a 6-coordinate geometry to one Rb(2), one Rb(4), two equivalent Rb(3), one V(2), and one Ag(2) atom. In the second Se site, Se(2) is bonded in a 6-coordinate geometry to one Rb(1), one Rb(3), two equivalent Rb(4), one V(2), and one Ag(2) atom. In the third Se site, Se(3) is bonded in a 6-coordinate geometry to one Rb(2), one Rb(4), two equivalent Rb(1), one V(1), and one Ag(1) atom. In the fourth Se site, Se(4) is bonded in a 6-coordinate geometry to one Rb(1), one Rb(3), two equivalent Rb(2), one V(1), and one Ag(1) atom. In the fifth Se site, Se(5) is bonded in a 6-coordinate geometry to one Rb(1), one Rb(3), two equivalent Rb(4), one V(2), and one Ag(2) atom. In the sixth Se site, Se(6) is bonded in a 6-coordinate geometry to one Rb(2), one Rb(4), two equivalent Rb(3), one V(2), and one Ag(2) atom. In the seventh Se site, Se(7) is bonded in a 6-coordinate geometry to one Rb(2), one Rb(4), two equivalent Rb(1), one V(1), and one Ag(1) atom. In the eighth Se site, Se(8) is bonded in a 6-coordinate geometry to one Rb(1), one Rb(3), two equivalent Rb(2), one V(1), and one Ag(1) atom.
Rb2VAgSe4 crystallizes in the triclinic P1 space group. There are four inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 8-coordinate geometry to one Se(2), one Se(4), one Se(5), one Se(8), two equivalent Se(3), and two equivalent Se(7) atoms. The Rb(1)-Se(2) bond length is 3.60 Å. The Rb(1)-Se(4) bond length is 3.81 Å. The Rb(1)-Se(5) bond length is 3.55 Å. The Rb(1)-Se(8) bond length is 3.78 Å. There is one shorter (3.47 Å) and one longer (3.98 Å) Rb(1)-Se(3) bond length. There is one shorter (3.57 Å) and one longer (3.96 Å) Rb(1)-Se(7) bond length. In the second Rb site, Rb(2) is bonded in a 8-coordinate geometry to one Se(1), one Se(3), one Se(6), one Se(7), two equivalent Se(4), and two equivalent Se(8) atoms. The Rb(2)-Se(1) bond length is 3.59 Å. The Rb(2)-Se(3) bond length is 3.75 Å. The Rb(2)-Se(6) bond length is 3.54 Å. The Rb(2)-Se(7) bond length is 3.80 Å. There is one shorter (3.49 Å) and one longer (3.91 Å) Rb(2)-Se(4) bond length. There is one shorter (3.47 Å) and one longer (3.99 Å) Rb(2)-Se(8) bond length. In the third Rb site, Rb(3) is bonded in a 8-coordinate geometry to one Se(2), one Se(4), one Se(5), one Se(8), two equivalent Se(1), and two equivalent Se(6) atoms. The Rb(3)-Se(2) bond length is 3.70 Å. The Rb(3)-Se(4) bond length is 3.56 Å. The Rb(3)-Se(5) bond length is 3.80 Å. The Rb(3)-Se(8) bond length is 3.57 Å. There is one shorter (3.52 Å) and one longer (3.93 Å) Rb(3)-Se(1) bond length. There is one shorter (3.44 Å) and one longer (3.92 Å) Rb(3)-Se(6) bond length. In the fourth Rb site, Rb(4) is bonded in a 8-coordinate geometry to one Se(1), one Se(3), one Se(6), one Se(7), two equivalent Se(2), and two equivalent Se(5) atoms. The Rb(4)-Se(1) bond length is 3.75 Å. The Rb(4)-Se(3) bond length is 3.63 Å. The Rb(4)-Se(6) bond length is 3.78 Å. The Rb(4)-Se(7) bond length is 3.53 Å. There is one shorter (3.58 Å) and one longer (3.86 Å) Rb(4)-Se(2) bond length. There is one shorter (3.50 Å) and one longer (4.00 Å) Rb(4)-Se(5) bond length. There are two inequivalent V sites. In the first V site, V(1) is bonded in a tetrahedral geometry to one Se(3), one Se(4), one Se(7), and one Se(8) atom. The V(1)-Se(3) bond length is 2.32 Å. The V(1)-Se(4) bond length is 2.34 Å. The V(1)-Se(7) bond length is 2.32 Å. The V(1)-Se(8) bond length is 2.30 Å. In the second V site, V(2) is bonded in a tetrahedral geometry to one Se(1), one Se(2), one Se(5), and one Se(6) atom. The V(2)-Se(1) bond length is 2.32 Å. The V(2)-Se(2) bond length is 2.34 Å. The V(2)-Se(5) bond length is 2.27 Å. The V(2)-Se(6) bond length is 2.42 Å. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 4-coordinate geometry to one Se(3), one Se(4), one Se(7), and one Se(8) atom. The Ag(1)-Se(3) bond length is 2.63 Å. The Ag(1)-Se(4) bond length is 2.66 Å. The Ag(1)-Se(7) bond length is 2.69 Å. The Ag(1)-Se(8) bond length is 2.67 Å. In the second Ag site, Ag(2) is bonded in a 4-coordinate geometry to one Se(1), one Se(2), one Se(5), and one Se(6) atom. The Ag(2)-Se(1) bond length is 2.67 Å. The Ag(2)-Se(2) bond length is 2.57 Å. The Ag(2)-Se(5) bond length is 2.65 Å. The Ag(2)-Se(6) bond length is 2.71 Å. There are eight inequivalent Se sites. In the first Se site, Se(1) is bonded in a 6-coordinate geometry to one Rb(2), one Rb(4), two equivalent Rb(3), one V(2), and one Ag(2) atom. In the second Se site, Se(2) is bonded in a 6-coordinate geometry to one Rb(1), one Rb(3), two equivalent Rb(4), one V(2), and one Ag(2) atom. In the third Se site, Se(3) is bonded in a 6-coordinate geometry to one Rb(2), one Rb(4), two equivalent Rb(1), one V(1), and one Ag(1) atom. In the fourth Se site, Se(4) is bonded in a 6-coordinate geometry to one Rb(1), one Rb(3), two equivalent Rb(2), one V(1), and one Ag(1) atom. In the fifth Se site, Se(5) is bonded in a 6-coordinate geometry to one Rb(1), one Rb(3), two equivalent Rb(4), one V(2), and one Ag(2) atom. In the sixth Se site, Se(6) is bonded in a 6-coordinate geometry to one Rb(2), one Rb(4), two equivalent Rb(3), one V(2), and one Ag(2) atom. In the seventh Se site, Se(7) is bonded in a 6-coordinate geometry to one Rb(2), one Rb(4), two equivalent Rb(1), one V(1), and one Ag(1) atom. In the eighth Se site, Se(8) is bonded in a 6-coordinate geometry to one Rb(1), one Rb(3), two equivalent Rb(2), one V(1), and one Ag(1) atom.