Sr10Mg5Mo3(WO15)2 crystallizes in the triclinic P-1 space group. There are five inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to one O(2), one O(5), one O(6), one O(9), two equivalent O(1), two equivalent O(10), two equivalent O(14), and two equivalent O(15) atoms to form distorted SrO12 cuboctahedra that share corners with four equivalent Sr(1)O12 cuboctahedra, corners with four equivalent Sr(5)O12 cuboctahedra,  a faceface with one Sr(1)O12 cuboctahedra,  a faceface with one Sr(4)O12 cuboctahedra, faces with four equivalent Sr(5)O12 cuboctahedra, faces with two equivalent Mg(1)O6 octahedra, faces with two equivalent Mg(2)O6 octahedra, faces with two equivalent Mo(1)O6 octahedra, and faces with two equivalent Mo(2)O6 octahedra. In the second Sr site, Sr(2) is bonded in a 12-coordinate geometry to one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), one O(8), one O(9), two equivalent O(11), and two equivalent O(13) atoms. In the third Sr site, Sr(3) is bonded in a 12-coordinate geometry to two equivalent O(3), two equivalent O(4), two equivalent O(7), two equivalent O(8), and four equivalent O(12) atoms. In the fourth Sr site, Sr(4) is bonded to one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), one O(8), one O(9), two equivalent O(11), and two equivalent O(13) atoms to form distorted SrO12 cuboctahedra that share corners with four equivalent Sr(4)O12 cuboctahedra, corners with four equivalent Sr(5)O12 cuboctahedra,  a faceface with one Sr(1)O12 cuboctahedra, faces with two equivalent Mg(2)O6 octahedra, faces with two equivalent Mg(3)O6 octahedra, faces with two equivalent W(1)O6 octahedra, and faces with two equivalent Mo(1)O6 octahedra. In the fifth Sr site, Sr(5) is bonded to one O(2), one O(5), one O(6), one O(9), two equivalent O(1), two equivalent O(10), two equivalent O(14), and two equivalent O(15) atoms to form distorted SrO12 cuboctahedra that share corners with four equivalent Sr(1)O12 cuboctahedra, corners with four equivalent Sr(4)O12 cuboctahedra, corners with four equivalent Sr(5)O12 cuboctahedra,  a faceface with one Sr(5)O12 cuboctahedra, faces with four equivalent Sr(1)O12 cuboctahedra, faces with two equivalent Mg(1)O6 octahedra, faces with two equivalent Mg(2)O6 octahedra, faces with two equivalent Mo(1)O6 octahedra, and faces with two equivalent Mo(2)O6 octahedra. There are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent O(1), two equivalent O(10), and two equivalent O(15) atoms to form MgO6 octahedra that share corners with two equivalent Mo(1)O6 octahedra, corners with four equivalent Mo(2)O6 octahedra, faces with four equivalent Sr(1)O12 cuboctahedra, and faces with four equivalent Sr(5)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 8-16°. In the second Mg site, Mg(2) is bonded to one O(11), one O(14), one O(2), one O(5), one O(6), and one O(9) atom to form MgO6 octahedra that share  a cornercorner with one W(1)O6 octahedra,  a cornercorner with one Mo(2)O6 octahedra, corners with four equivalent Mo(1)O6 octahedra, faces with two equivalent Sr(1)O12 cuboctahedra, faces with two equivalent Sr(4)O12 cuboctahedra, and faces with two equivalent Sr(5)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 8-16°. In the third Mg site, Mg(3) is bonded to one O(12), one O(13), one O(3), one O(4), one O(7), and one O(8) atom to form MgO6 octahedra that share  a cornercorner with one Mo(1)O6 octahedra, corners with five equivalent W(1)O6 octahedra, and faces with two equivalent Sr(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 8-16°. W(1) 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 Mg(2)O6 octahedra, corners with five equivalent Mg(3)O6 octahedra, and faces with two equivalent Sr(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 8-16°. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to one O(13), one O(15), one O(2), one O(5), one O(6), and one O(9) atom to form MoO6 octahedra that share  a cornercorner with one Mg(1)O6 octahedra,  a cornercorner with one Mg(3)O6 octahedra, corners with four equivalent Mg(2)O6 octahedra, faces with two equivalent Sr(1)O12 cuboctahedra, faces with two equivalent Sr(4)O12 cuboctahedra, and faces with two equivalent Sr(5)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 8-16°. In the second Mo site, Mo(2) is bonded to two equivalent O(1), two equivalent O(10), and two equivalent O(14) atoms to form MoO6 octahedra that share corners with two equivalent Mg(2)O6 octahedra, corners with four equivalent Mg(1)O6 octahedra, faces with four equivalent Sr(1)O12 cuboctahedra, and faces with four equivalent Sr(5)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 8-16°. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Sr(5), one Mg(1), and one Mo(2) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(2), one Sr(4), one Sr(5), one Mg(2), and one Mo(1) atom. In the third O site, O(3) is bonded in a 6-coordinate geometry to one Sr(2), one Sr(4), two equivalent Sr(3), one Mg(3), and one W(1) atom. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Sr(2), one Sr(4), two equivalent Sr(3), one Mg(3), and one W(1) atom. In the fifth O site, O(5) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(2), one Sr(4), one Sr(5), one Mg(2), and one Mo(1) atom. In the sixth O site, O(6) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(2), one Sr(4), one Sr(5), one Mg(2), and one Mo(1) atom. In the seventh O site, O(7) is bonded in a 6-coordinate geometry to one Sr(2), one Sr(4), two equivalent Sr(3), one Mg(3), and one W(1) atom. In the eighth O site, O(8) is bonded in a 6-coordinate geometry to one Sr(2), one Sr(4), two equivalent Sr(3), one Mg(3), and one W(1) atom. In the ninth O site, O(9) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(2), one Sr(4), one Sr(5), one Mg(2), and one Mo(1) atom. In the tenth O site, O(10) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Sr(5), one Mg(1), and one Mo(2) atom. In the eleventh O site, O(11) is bonded in a 6-coordinate geometry to two equivalent Sr(2), two equivalent Sr(4), one Mg(2), and one W(1) atom. In the twelfth O site, O(12) is bonded in a 6-coordinate geometry to four equivalent Sr(3), one Mg(3), and one W(1) atom. In the thirteenth O site, O(13) is bonded in a 6-coordinate geometry to two equivalent Sr(2), two equivalent Sr(4), one Mg(3), and one Mo(1) atom. In the fourteenth O site, O(14) is bonded in a 2-coordinate geometry to two equivalent Sr(1), two equivalent Sr(5), one Mg(2), and one Mo(2) atom. In the fifteenth O site, O(15) is bonded in a 2-coordinate geometry to two equivalent Sr(1), two equivalent Sr(5), one Mg(1), and one Mo(1) atom.
Sr10Mg5Mo3(WO15)2 crystallizes in the triclinic P-1 space group. There are five inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to one O(2), one O(5), one O(6), one O(9), two equivalent O(1), two equivalent O(10), two equivalent O(14), and two equivalent O(15) atoms to form distorted SrO12 cuboctahedra that share corners with four equivalent Sr(1)O12 cuboctahedra, corners with four equivalent Sr(5)O12 cuboctahedra,  a faceface with one Sr(1)O12 cuboctahedra,  a faceface with one Sr(4)O12 cuboctahedra, faces with four equivalent Sr(5)O12 cuboctahedra, faces with two equivalent Mg(1)O6 octahedra, faces with two equivalent Mg(2)O6 octahedra, faces with two equivalent Mo(1)O6 octahedra, and faces with two equivalent Mo(2)O6 octahedra. The Sr(1)-O(2) bond length is 2.75 Å. The Sr(1)-O(5) bond length is 2.71 Å. The Sr(1)-O(6) bond length is 3.09 Å. The Sr(1)-O(9) bond length is 2.74 Å. There is one shorter (2.91 Å) and one longer (2.94 Å) Sr(1)-O(1) bond length. There is one shorter (2.59 Å) and one longer (2.95 Å) Sr(1)-O(10) bond length. There is one shorter (2.64 Å) and one longer (3.05 Å) Sr(1)-O(14) bond length. There is one shorter (2.68 Å) and one longer (3.00 Å) Sr(1)-O(15) bond length. In the second Sr site, Sr(2) is bonded in a 12-coordinate geometry to one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), one O(8), one O(9), two equivalent O(11), and two equivalent O(13) atoms. The Sr(2)-O(2) bond length is 2.90 Å. The Sr(2)-O(3) bond length is 2.76 Å. The Sr(2)-O(4) bond length is 2.72 Å. The Sr(2)-O(5) bond length is 2.93 Å. The Sr(2)-O(6) bond length is 2.59 Å. The Sr(2)-O(7) bond length is 3.11 Å. The Sr(2)-O(8) bond length is 2.75 Å. The Sr(2)-O(9) bond length is 2.93 Å. There is one shorter (2.67 Å) and one longer (3.01 Å) Sr(2)-O(11) bond length. There is one shorter (2.64 Å) and one longer (3.05 Å) Sr(2)-O(13) bond length. In the third Sr site, Sr(3) is bonded in a 12-coordinate geometry to two equivalent O(3), two equivalent O(4), two equivalent O(7), two equivalent O(8), and four equivalent O(12) atoms. There is one shorter (2.71 Å) and one longer (2.92 Å) Sr(3)-O(3) bond length. There is one shorter (2.75 Å) and one longer (2.95 Å) Sr(3)-O(4) bond length. There is one shorter (2.59 Å) and one longer (2.74 Å) Sr(3)-O(7) bond length. There is one shorter (2.95 Å) and one longer (3.10 Å) Sr(3)-O(8) bond length. There are a spread of Sr(3)-O(12) bond distances ranging from 2.64-3.05 Å. In the fourth Sr site, Sr(4) is bonded to one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), one O(8), one O(9), two equivalent O(11), and two equivalent O(13) atoms to form distorted SrO12 cuboctahedra that share corners with four equivalent Sr(4)O12 cuboctahedra, corners with four equivalent Sr(5)O12 cuboctahedra,  a faceface with one Sr(1)O12 cuboctahedra, faces with two equivalent Mg(2)O6 octahedra, faces with two equivalent Mg(3)O6 octahedra, faces with two equivalent W(1)O6 octahedra, and faces with two equivalent Mo(1)O6 octahedra. The Sr(4)-O(2) bond length is 2.70 Å. The Sr(4)-O(3) bond length is 2.95 Å. The Sr(4)-O(4) bond length is 2.92 Å. The Sr(4)-O(5) bond length is 2.74 Å. The Sr(4)-O(6) bond length is 2.73 Å. The Sr(4)-O(7) bond length is 2.96 Å. The Sr(4)-O(8) bond length is 2.60 Å. The Sr(4)-O(9) bond length is 3.09 Å. There is one shorter (2.64 Å) and one longer (3.05 Å) Sr(4)-O(11) bond length. There is one shorter (2.68 Å) and one longer (3.00 Å) Sr(4)-O(13) bond length. In the fifth Sr site, Sr(5) is bonded to one O(2), one O(5), one O(6), one O(9), two equivalent O(1), two equivalent O(10), two equivalent O(14), and two equivalent O(15) atoms to form distorted SrO12 cuboctahedra that share corners with four equivalent Sr(1)O12 cuboctahedra, corners with four equivalent Sr(4)O12 cuboctahedra, corners with four equivalent Sr(5)O12 cuboctahedra,  a faceface with one Sr(5)O12 cuboctahedra, faces with four equivalent Sr(1)O12 cuboctahedra, faces with two equivalent Mg(1)O6 octahedra, faces with two equivalent Mg(2)O6 octahedra, faces with two equivalent Mo(1)O6 octahedra, and faces with two equivalent Mo(2)O6 octahedra. The Sr(5)-O(2) bond length is 2.94 Å. The Sr(5)-O(5) bond length is 2.91 Å. The Sr(5)-O(6) bond length is 2.95 Å. The Sr(5)-O(9) bond length is 2.59 Å. There is one shorter (2.71 Å) and one longer (2.75 Å) Sr(5)-O(1) bond length. There is one shorter (2.74 Å) and one longer (3.09 Å) Sr(5)-O(10) bond length. There is one shorter (2.68 Å) and one longer (3.00 Å) Sr(5)-O(14) bond length. There is one shorter (2.64 Å) and one longer (3.05 Å) Sr(5)-O(15) bond length. There are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent O(1), two equivalent O(10), and two equivalent O(15) atoms to form MgO6 octahedra that share corners with two equivalent Mo(1)O6 octahedra, corners with four equivalent Mo(2)O6 octahedra, faces with four equivalent Sr(1)O12 cuboctahedra, and faces with four equivalent Sr(5)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 8-16°. Both Mg(1)-O(1) bond lengths are 2.08 Å. Both Mg(1)-O(10) bond lengths are 2.09 Å. Both Mg(1)-O(15) bond lengths are 2.08 Å. In the second Mg site, Mg(2) is bonded to one O(11), one O(14), one O(2), one O(5), one O(6), and one O(9) atom to form MgO6 octahedra that share  a cornercorner with one W(1)O6 octahedra,  a cornercorner with one Mo(2)O6 octahedra, corners with four equivalent Mo(1)O6 octahedra, faces with two equivalent Sr(1)O12 cuboctahedra, faces with two equivalent Sr(4)O12 cuboctahedra, and faces with two equivalent Sr(5)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 8-16°. The Mg(2)-O(11) bond length is 2.08 Å. The Mg(2)-O(14) bond length is 2.08 Å. The Mg(2)-O(2) bond length is 2.08 Å. The Mg(2)-O(5) bond length is 2.08 Å. The Mg(2)-O(6) bond length is 2.09 Å. The Mg(2)-O(9) bond length is 2.09 Å. In the third Mg site, Mg(3) is bonded to one O(12), one O(13), one O(3), one O(4), one O(7), and one O(8) atom to form MgO6 octahedra that share  a cornercorner with one Mo(1)O6 octahedra, corners with five equivalent W(1)O6 octahedra, and faces with two equivalent Sr(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 8-16°. The Mg(3)-O(12) bond length is 2.08 Å. The Mg(3)-O(13) bond length is 2.09 Å. The Mg(3)-O(3) bond length is 2.08 Å. The Mg(3)-O(4) bond length is 2.08 Å. The Mg(3)-O(7) bond length is 2.08 Å. The Mg(3)-O(8) bond length is 2.08 Å. W(1) 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 Mg(2)O6 octahedra, corners with five equivalent Mg(3)O6 octahedra, and faces with two equivalent Sr(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 8-16°. The W(1)-O(11) bond length is 1.96 Å. The W(1)-O(12) bond length is 1.95 Å. The W(1)-O(3) bond length is 1.95 Å. The W(1)-O(4) bond length is 1.95 Å. The W(1)-O(7) bond length is 1.95 Å. The W(1)-O(8) bond length is 1.95 Å. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to one O(13), one O(15), one O(2), one O(5), one O(6), and one O(9) atom to form MoO6 octahedra that share  a cornercorner with one Mg(1)O6 octahedra,  a cornercorner with one Mg(3)O6 octahedra, corners with four equivalent Mg(2)O6 octahedra, faces with two equivalent Sr(1)O12 cuboctahedra, faces with two equivalent Sr(4)O12 cuboctahedra, and faces with two equivalent Sr(5)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 8-16°. The Mo(1)-O(13) bond length is 1.94 Å. The Mo(1)-O(15) bond length is 1.95 Å. The Mo(1)-O(2) bond length is 1.95 Å. The Mo(1)-O(5) bond length is 1.95 Å. The Mo(1)-O(6) bond length is 1.95 Å. The Mo(1)-O(9) bond length is 1.95 Å. In the second Mo site, Mo(2) is bonded to two equivalent O(1), two equivalent O(10), and two equivalent O(14) atoms to form MoO6 octahedra that share corners with two equivalent Mg(2)O6 octahedra, corners with four equivalent Mg(1)O6 octahedra, faces with four equivalent Sr(1)O12 cuboctahedra, and faces with four equivalent Sr(5)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 8-16°. Both Mo(2)-O(1) bond lengths are 1.95 Å. Both Mo(2)-O(10) bond lengths are 1.95 Å. Both Mo(2)-O(14) bond lengths are 1.95 Å. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Sr(5), one Mg(1), and one Mo(2) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(2), one Sr(4), one Sr(5), one Mg(2), and one Mo(1) atom. In the third O site, O(3) is bonded in a 6-coordinate geometry to one Sr(2), one Sr(4), two equivalent Sr(3), one Mg(3), and one W(1) atom. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Sr(2), one Sr(4), two equivalent Sr(3), one Mg(3), and one W(1) atom. In the fifth O site, O(5) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(2), one Sr(4), one Sr(5), one Mg(2), and one Mo(1) atom. In the sixth O site, O(6) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(2), one Sr(4), one Sr(5), one Mg(2), and one Mo(1) atom. In the seventh O site, O(7) is bonded in a 6-coordinate geometry to one Sr(2), one Sr(4), two equivalent Sr(3), one Mg(3), and one W(1) atom. In the eighth O site, O(8) is bonded in a 6-coordinate geometry to one Sr(2), one Sr(4), two equivalent Sr(3), one Mg(3), and one W(1) atom. In the ninth O site, O(9) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(2), one Sr(4), one Sr(5), one Mg(2), and one Mo(1) atom. In the tenth O site, O(10) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Sr(5), one Mg(1), and one Mo(2) atom. In the eleventh O site, O(11) is bonded in a 6-coordinate geometry to two equivalent Sr(2), two equivalent Sr(4), one Mg(2), and one W(1) atom. In the twelfth O site, O(12) is bonded in a 6-coordinate geometry to four equivalent Sr(3), one Mg(3), and one W(1) atom. In the thirteenth O site, O(13) is bonded in a 6-coordinate geometry to two equivalent Sr(2), two equivalent Sr(4), one Mg(3), and one Mo(1) atom. In the fourteenth O site, O(14) is bonded in a 2-coordinate geometry to two equivalent Sr(1), two equivalent Sr(5), one Mg(2), and one Mo(2) atom. In the fifteenth O site, O(15) is bonded in a 2-coordinate geometry to two equivalent Sr(1), two equivalent Sr(5), one Mg(1), and one Mo(1) atom.