Ba8SrCa3(WO6)4 crystallizes in the triclinic P-1 space group. There are four inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 12-coordinate geometry to one O(1), one O(10), one O(2), one O(7), one O(8), one O(9), two equivalent O(11), two equivalent O(4), and two equivalent O(6) atoms. In the second Ba site, Ba(2) is bonded in a 12-coordinate geometry to one O(1), one O(10), one O(11), one O(4), one O(6), two equivalent O(12), two equivalent O(3), and three equivalent O(7) atoms. In the third Ba site, Ba(3) is bonded in a 12-coordinate geometry to one O(11), one O(12), one O(3), one O(4), one O(5), one O(6), two equivalent O(2), two equivalent O(8), and two equivalent O(9) atoms. In the fourth Ba site, Ba(4) is bonded in a 12-coordinate geometry to one O(12), one O(2), one O(3), one O(8), one O(9), two equivalent O(1), two equivalent O(10), and three equivalent O(5) atoms. Sr(1) is bonded to two equivalent O(11), two equivalent O(4), and two equivalent O(6) atoms to form SrO6 octahedra that share corners with two equivalent W(1)O6 octahedra and corners with four equivalent W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 15-16°. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded to one O(1), one O(10), one O(12), one O(3), one O(5), and one O(7) atom to form CaO6 octahedra that share corners with three equivalent W(1)O6 octahedra and corners with three equivalent W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 14-15°. In the second Ca site, Ca(2) is bonded to two equivalent O(2), two equivalent O(8), and two equivalent O(9) atoms to form CaO6 octahedra that share corners with two equivalent W(2)O6 octahedra and corners with four equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles are 14°. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(10), one O(2), one O(5), one O(6), and one O(9) atom to form WO6 octahedra that share  a cornercorner with one Sr(1)O6 octahedra, corners with two equivalent Ca(2)O6 octahedra, and corners with three equivalent Ca(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 14-15°. In the second W site, W(2) is bonded to one O(11), one O(12), one O(3), one O(4), one O(7), and one O(8) atom to form WO6 octahedra that share  a cornercorner with one Ca(2)O6 octahedra, corners with two equivalent Sr(1)O6 octahedra, and corners with three equivalent Ca(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 14-16°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Ba(1), one Ba(2), two equivalent Ba(4), one Ca(1), and one W(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Ba(1), one Ba(4), two equivalent Ba(3), one Ca(2), and one W(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Ba(3), one Ba(4), two equivalent Ba(2), one Ca(1), and one W(2) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Ba(2), one Ba(3), two equivalent Ba(1), one Sr(1), and one W(2) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one Ba(3), three equivalent Ba(4), one Ca(1), and one W(1) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to one Ba(2), one Ba(3), two equivalent Ba(1), one Sr(1), and one W(1) atom. In the seventh O site, O(7) is bonded in a 6-coordinate geometry to one Ba(1), three equivalent Ba(2), one Ca(1), and one W(2) atom. In the eighth O site, O(8) is bonded in a 2-coordinate geometry to one Ba(1), one Ba(4), two equivalent Ba(3), one Ca(2), and one W(2) atom. In the ninth O site, O(9) is bonded in a 6-coordinate geometry to one Ba(1), one Ba(4), two equivalent Ba(3), one Ca(2), and one W(1) atom. In the tenth O site, O(10) is bonded in a 2-coordinate geometry to one Ba(1), one Ba(2), two equivalent Ba(4), one Ca(1), and one W(1) atom. In the eleventh O site, O(11) is bonded in a 2-coordinate geometry to one Ba(2), one Ba(3), two equivalent Ba(1), one Sr(1), and one W(2) atom. In the twelfth O site, O(12) is bonded in a 2-coordinate geometry to one Ba(3), one Ba(4), two equivalent Ba(2), one Ca(1), and one W(2) atom.
Ba8SrCa3(WO6)4 crystallizes in the triclinic P-1 space group. There are four inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 12-coordinate geometry to one O(1), one O(10), one O(2), one O(7), one O(8), one O(9), two equivalent O(11), two equivalent O(4), and two equivalent O(6) atoms. The Ba(1)-O(1) bond length is 2.77 Å. The Ba(1)-O(10) bond length is 2.98 Å. The Ba(1)-O(2) bond length is 2.98 Å. The Ba(1)-O(7) bond length is 3.34 Å. The Ba(1)-O(8) bond length is 2.81 Å. The Ba(1)-O(9) bond length is 3.29 Å. There is one shorter (2.80 Å) and one longer (3.12 Å) Ba(1)-O(11) bond length. There is one shorter (3.14 Å) and one longer (3.37 Å) Ba(1)-O(4) bond length. There is one shorter (2.99 Å) and one longer (3.09 Å) Ba(1)-O(6) bond length. In the second Ba site, Ba(2) is bonded in a 12-coordinate geometry to one O(1), one O(10), one O(11), one O(4), one O(6), two equivalent O(12), two equivalent O(3), and three equivalent O(7) atoms. The Ba(2)-O(1) bond length is 3.09 Å. The Ba(2)-O(10) bond length is 2.80 Å. The Ba(2)-O(11) bond length is 3.01 Å. The Ba(2)-O(4) bond length is 2.77 Å. The Ba(2)-O(6) bond length is 3.36 Å. There is one shorter (3.04 Å) and one longer (3.33 Å) Ba(2)-O(12) bond length. There is one shorter (3.01 Å) and one longer (3.28 Å) Ba(2)-O(3) bond length. There are a spread of Ba(2)-O(7) bond distances ranging from 2.74-3.08 Å. In the third Ba site, Ba(3) is bonded in a 12-coordinate geometry to one O(11), one O(12), one O(3), one O(4), one O(5), one O(6), two equivalent O(2), two equivalent O(8), and two equivalent O(9) atoms. The Ba(3)-O(11) bond length is 3.35 Å. The Ba(3)-O(12) bond length is 3.01 Å. The Ba(3)-O(3) bond length is 2.80 Å. The Ba(3)-O(4) bond length is 3.00 Å. The Ba(3)-O(5) bond length is 3.28 Å. The Ba(3)-O(6) bond length is 2.79 Å. There is one shorter (3.04 Å) and one longer (3.32 Å) Ba(3)-O(2) bond length. There is one shorter (3.00 Å) and one longer (3.07 Å) Ba(3)-O(8) bond length. There is one shorter (2.76 Å) and one longer (3.09 Å) Ba(3)-O(9) bond length. In the fourth Ba site, Ba(4) is bonded in a 12-coordinate geometry to one O(12), one O(2), one O(3), one O(8), one O(9), two equivalent O(1), two equivalent O(10), and three equivalent O(5) atoms. The Ba(4)-O(12) bond length is 2.77 Å. The Ba(4)-O(2) bond length is 2.77 Å. The Ba(4)-O(3) bond length is 3.06 Å. The Ba(4)-O(8) bond length is 3.29 Å. The Ba(4)-O(9) bond length is 2.98 Å. There is one shorter (2.99 Å) and one longer (3.30 Å) Ba(4)-O(1) bond length. There is one shorter (3.07 Å) and one longer (3.29 Å) Ba(4)-O(10) bond length. There are a spread of Ba(4)-O(5) bond distances ranging from 2.79-3.07 Å. Sr(1) is bonded to two equivalent O(11), two equivalent O(4), and two equivalent O(6) atoms to form SrO6 octahedra that share corners with two equivalent W(1)O6 octahedra and corners with four equivalent W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 15-16°. Both Sr(1)-O(11) bond lengths are 2.41 Å. Both Sr(1)-O(4) bond lengths are 2.41 Å. Both Sr(1)-O(6) bond lengths are 2.41 Å. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded to one O(1), one O(10), one O(12), one O(3), one O(5), and one O(7) atom to form CaO6 octahedra that share corners with three equivalent W(1)O6 octahedra and corners with three equivalent W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 14-15°. The Ca(1)-O(1) bond length is 2.35 Å. The Ca(1)-O(10) bond length is 2.35 Å. The Ca(1)-O(12) bond length is 2.33 Å. The Ca(1)-O(3) bond length is 2.33 Å. The Ca(1)-O(5) bond length is 2.33 Å. The Ca(1)-O(7) bond length is 2.34 Å. In the second Ca site, Ca(2) is bonded to two equivalent O(2), two equivalent O(8), and two equivalent O(9) atoms to form CaO6 octahedra that share corners with two equivalent W(2)O6 octahedra and corners with four equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles are 14°. Both Ca(2)-O(2) bond lengths are 2.35 Å. Both Ca(2)-O(8) bond lengths are 2.34 Å. Both Ca(2)-O(9) bond lengths are 2.35 Å. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(10), one O(2), one O(5), one O(6), and one O(9) atom to form WO6 octahedra that share  a cornercorner with one Sr(1)O6 octahedra, corners with two equivalent Ca(2)O6 octahedra, and corners with three equivalent Ca(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 14-15°. The W(1)-O(1) bond length is 1.97 Å. The W(1)-O(10) bond length is 1.97 Å. The W(1)-O(2) bond length is 1.97 Å. The W(1)-O(5) bond length is 1.96 Å. The W(1)-O(6) bond length is 1.94 Å. The W(1)-O(9) bond length is 1.97 Å. In the second W site, W(2) is bonded to one O(11), one O(12), one O(3), one O(4), one O(7), and one O(8) atom to form WO6 octahedra that share  a cornercorner with one Ca(2)O6 octahedra, corners with two equivalent Sr(1)O6 octahedra, and corners with three equivalent Ca(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 14-16°. The W(2)-O(11) bond length is 1.95 Å. The W(2)-O(12) bond length is 1.97 Å. The W(2)-O(3) bond length is 1.97 Å. The W(2)-O(4) bond length is 1.94 Å. The W(2)-O(7) bond length is 1.97 Å. The W(2)-O(8) bond length is 1.97 Å. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Ba(1), one Ba(2), two equivalent Ba(4), one Ca(1), and one W(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Ba(1), one Ba(4), two equivalent Ba(3), one Ca(2), and one W(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Ba(3), one Ba(4), two equivalent Ba(2), one Ca(1), and one W(2) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Ba(2), one Ba(3), two equivalent Ba(1), one Sr(1), and one W(2) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one Ba(3), three equivalent Ba(4), one Ca(1), and one W(1) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to one Ba(2), one Ba(3), two equivalent Ba(1), one Sr(1), and one W(1) atom. In the seventh O site, O(7) is bonded in a 6-coordinate geometry to one Ba(1), three equivalent Ba(2), one Ca(1), and one W(2) atom. In the eighth O site, O(8) is bonded in a 2-coordinate geometry to one Ba(1), one Ba(4), two equivalent Ba(3), one Ca(2), and one W(2) atom. In the ninth O site, O(9) is bonded in a 6-coordinate geometry to one Ba(1), one Ba(4), two equivalent Ba(3), one Ca(2), and one W(1) atom. In the tenth O site, O(10) is bonded in a 2-coordinate geometry to one Ba(1), one Ba(2), two equivalent Ba(4), one Ca(1), and one W(1) atom. In the eleventh O site, O(11) is bonded in a 2-coordinate geometry to one Ba(2), one Ba(3), two equivalent Ba(1), one Sr(1), and one W(2) atom. In the twelfth O site, O(12) is bonded in a 2-coordinate geometry to one Ba(3), one Ba(4), two equivalent Ba(2), one Ca(1), and one W(2) atom.