Cs4Mg(WO4)2 crystallizes in the triclinic P1 space group. There are four inequivalent Cs sites. In the first Cs site, Cs(1) is bonded in a 8-coordinate geometry to one Mg(1), one O(3), one O(4), one O(5), one O(6), one O(7), and two equivalent O(1) atoms. In the second Cs site, Cs(2) is bonded in a 7-coordinate geometry to one O(3), one O(4), one O(5), one O(6), one O(8), and two equivalent O(2) atoms. In the third Cs site, Cs(3) is bonded in a 8-coordinate geometry to one Mg(1), one O(1), one O(3), one O(4), one O(5), one O(6), and two equivalent O(7) atoms. In the fourth Cs site, Cs(4) is bonded in a 7-coordinate geometry to one O(2), one O(3), one O(4), one O(5), one O(6), and two equivalent O(8) atoms. Mg(1) is bonded in a 2-coordinate geometry to one Cs(1), one Cs(3), one O(2), and one O(8) atom. There are two inequivalent W sites. In the first W site, W(1) is bonded in a tetrahedral geometry to one O(1), one O(5), one O(6), and one O(7) atom. In the second W site, W(2) is bonded in a tetrahedral geometry to one O(2), one O(3), one O(4), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Cs(3), two equivalent Cs(1), and one W(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Cs(4), two equivalent Cs(2), one Mg(1), and one W(2) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Cs(1), one Cs(2), one Cs(3), one Cs(4), and one W(2) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Cs(1), one Cs(2), one Cs(3), one Cs(4), and one W(2) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Cs(1), one Cs(2), one Cs(3), one Cs(4), and one W(1) atom. In the sixth O site, O(6) is bonded in a 5-coordinate geometry to one Cs(1), one Cs(2), one Cs(3), one Cs(4), and one W(1) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Cs(1), two equivalent Cs(3), and one W(1) atom. In the eighth O site, O(8) is bonded in a 2-coordinate geometry to one Cs(2), two equivalent Cs(4), one Mg(1), and one W(2) atom.
Cs4Mg(WO4)2 crystallizes in the triclinic P1 space group. There are four inequivalent Cs sites. In the first Cs site, Cs(1) is bonded in a 8-coordinate geometry to one Mg(1), one O(3), one O(4), one O(5), one O(6), one O(7), and two equivalent O(1) atoms. The Cs(1)-Mg(1) bond length is 4.05 Å. The Cs(1)-O(3) bond length is 3.15 Å. The Cs(1)-O(4) bond length is 3.20 Å. The Cs(1)-O(5) bond length is 3.25 Å. The Cs(1)-O(6) bond length is 3.41 Å. The Cs(1)-O(7) bond length is 3.12 Å. There is one shorter (3.23 Å) and one longer (3.71 Å) Cs(1)-O(1) bond length. In the second Cs site, Cs(2) is bonded in a 7-coordinate geometry to one O(3), one O(4), one O(5), one O(6), one O(8), and two equivalent O(2) atoms. The Cs(2)-O(3) bond length is 3.19 Å. The Cs(2)-O(4) bond length is 3.09 Å. The Cs(2)-O(5) bond length is 3.32 Å. The Cs(2)-O(6) bond length is 3.14 Å. The Cs(2)-O(8) bond length is 3.28 Å. There is one shorter (3.45 Å) and one longer (3.62 Å) Cs(2)-O(2) bond length. In the third Cs site, Cs(3) is bonded in a 8-coordinate geometry to one Mg(1), one O(1), one O(3), one O(4), one O(5), one O(6), and two equivalent O(7) atoms. The Cs(3)-Mg(1) bond length is 4.11 Å. The Cs(3)-O(1) bond length is 3.12 Å. The Cs(3)-O(3) bond length is 3.25 Å. The Cs(3)-O(4) bond length is 3.64 Å. The Cs(3)-O(5) bond length is 3.20 Å. The Cs(3)-O(6) bond length is 3.29 Å. There is one shorter (3.27 Å) and one longer (3.57 Å) Cs(3)-O(7) bond length. In the fourth Cs site, Cs(4) is bonded in a 7-coordinate geometry to one O(2), one O(3), one O(4), one O(5), one O(6), and two equivalent O(8) atoms. The Cs(4)-O(2) bond length is 3.29 Å. The Cs(4)-O(3) bond length is 3.45 Å. The Cs(4)-O(4) bond length is 3.15 Å. The Cs(4)-O(5) bond length is 3.18 Å. The Cs(4)-O(6) bond length is 3.00 Å. There is one shorter (3.37 Å) and one longer (3.77 Å) Cs(4)-O(8) bond length. Mg(1) is bonded in a 2-coordinate geometry to one Cs(1), one Cs(3), one O(2), and one O(8) atom. The Mg(1)-O(2) bond length is 2.24 Å. The Mg(1)-O(8) bond length is 2.23 Å. There are two inequivalent W sites. In the first W site, W(1) is bonded in a tetrahedral geometry to one O(1), one O(5), one O(6), and one O(7) atom. The W(1)-O(1) bond length is 1.82 Å. The W(1)-O(5) bond length is 1.83 Å. The W(1)-O(6) bond length is 1.83 Å. The W(1)-O(7) bond length is 1.82 Å. In the second W site, W(2) is bonded in a tetrahedral geometry to one O(2), one O(3), one O(4), and one O(8) atom. The W(2)-O(2) bond length is 1.85 Å. The W(2)-O(3) bond length is 1.81 Å. The W(2)-O(4) bond length is 1.81 Å. The W(2)-O(8) bond length is 1.85 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Cs(3), two equivalent Cs(1), and one W(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Cs(4), two equivalent Cs(2), one Mg(1), and one W(2) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Cs(1), one Cs(2), one Cs(3), one Cs(4), and one W(2) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Cs(1), one Cs(2), one Cs(3), one Cs(4), and one W(2) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Cs(1), one Cs(2), one Cs(3), one Cs(4), and one W(1) atom. In the sixth O site, O(6) is bonded in a 5-coordinate geometry to one Cs(1), one Cs(2), one Cs(3), one Cs(4), and one W(1) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Cs(1), two equivalent Cs(3), and one W(1) atom. In the eighth O site, O(8) is bonded in a 2-coordinate geometry to one Cs(2), two equivalent Cs(4), one Mg(1), and one W(2) atom.