Ag8SnSe6 crystallizes in the orthorhombic Pmn2_1 space group. There are five inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 4-coordinate geometry to one Se(1), one Se(2), and two equivalent Se(5) atoms. In the second Ag site, Ag(2) is bonded in a 2-coordinate geometry to one Se(2), one Se(3), and one Se(4) atom. In the third Ag site, Ag(3) is bonded in a 3-coordinate geometry to one Se(1), one Se(4), and one Se(5) atom. In the fourth Ag site, Ag(4) is bonded in a 3-coordinate geometry to one Se(2), one Se(3), and one Se(5) atom. In the fifth Ag site, Ag(5) is bonded in a 4-coordinate geometry to one Se(1), one Se(2), one Se(4), and one Se(5) atom. Sn(1) is bonded in a tetrahedral geometry to one Se(3), one Se(4), and two equivalent Se(5) atoms. There are five inequivalent Se sites. In the first Se site, Se(1) is bonded in a 5-coordinate geometry to one Ag(1), two equivalent Ag(3), and two equivalent Ag(5) atoms. In the second Se site, Se(2) is bonded in a distorted hexagonal planar geometry to one Ag(1), one Ag(2), two equivalent Ag(4), and two equivalent Ag(5) atoms. In the third Se site, Se(3) is bonded in a distorted trigonal pyramidal geometry to one Ag(2), two equivalent Ag(4), and one Sn(1) atom. In the fourth Se site, Se(4) is bonded in a 6-coordinate geometry to one Ag(2), two equivalent Ag(3), two equivalent Ag(5), and one Sn(1) atom. In the fifth Se site, Se(5) is bonded in a 5-coordinate geometry to one Ag(1), one Ag(3), one Ag(4), one Ag(5), and one Sn(1) atom.
Ag8SnSe6 crystallizes in the orthorhombic Pmn2_1 space group. There are five inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 4-coordinate geometry to one Se(1), one Se(2), and two equivalent Se(5) atoms. The Ag(1)-Se(1) bond length is 2.64 Å. The Ag(1)-Se(2) bond length is 2.70 Å. Both Ag(1)-Se(5) bond lengths are 2.76 Å. In the second Ag site, Ag(2) is bonded in a 2-coordinate geometry to one Se(2), one Se(3), and one Se(4) atom. The Ag(2)-Se(2) bond length is 2.60 Å. The Ag(2)-Se(3) bond length is 2.58 Å. The Ag(2)-Se(4) bond length is 3.25 Å. In the third Ag site, Ag(3) is bonded in a 3-coordinate geometry to one Se(1), one Se(4), and one Se(5) atom. The Ag(3)-Se(1) bond length is 2.54 Å. The Ag(3)-Se(4) bond length is 2.62 Å. The Ag(3)-Se(5) bond length is 2.88 Å. In the fourth Ag site, Ag(4) is bonded in a 3-coordinate geometry to one Se(2), one Se(3), and one Se(5) atom. The Ag(4)-Se(2) bond length is 2.70 Å. The Ag(4)-Se(3) bond length is 2.78 Å. The Ag(4)-Se(5) bond length is 2.70 Å. In the fifth Ag site, Ag(5) is bonded in a 4-coordinate geometry to one Se(1), one Se(2), one Se(4), and one Se(5) atom. The Ag(5)-Se(1) bond length is 2.65 Å. The Ag(5)-Se(2) bond length is 2.74 Å. The Ag(5)-Se(4) bond length is 2.92 Å. The Ag(5)-Se(5) bond length is 2.84 Å. Sn(1) is bonded in a tetrahedral geometry to one Se(3), one Se(4), and two equivalent Se(5) atoms. The Sn(1)-Se(3) bond length is 2.53 Å. The Sn(1)-Se(4) bond length is 2.54 Å. Both Sn(1)-Se(5) bond lengths are 2.52 Å. There are five inequivalent Se sites. In the first Se site, Se(1) is bonded in a 5-coordinate geometry to one Ag(1), two equivalent Ag(3), and two equivalent Ag(5) atoms. In the second Se site, Se(2) is bonded in a distorted hexagonal planar geometry to one Ag(1), one Ag(2), two equivalent Ag(4), and two equivalent Ag(5) atoms. In the third Se site, Se(3) is bonded in a distorted trigonal pyramidal geometry to one Ag(2), two equivalent Ag(4), and one Sn(1) atom. In the fourth Se site, Se(4) is bonded in a 6-coordinate geometry to one Ag(2), two equivalent Ag(3), two equivalent Ag(5), and one Sn(1) atom. In the fifth Se site, Se(5) is bonded in a 5-coordinate geometry to one Ag(1), one Ag(3), one Ag(4), one Ag(5), and one Sn(1) atom.