Os3Sn15O14 crystallizes in the monoclinic Cm space group. There are three inequivalent Os sites. In the first Os site, Os(1) is bonded to one Sn(5), one Sn(6), two equivalent Sn(1), and two equivalent Sn(4) atoms to form OsSn6 octahedra that share corners with two equivalent Os(2)Sn6 octahedra, corners with two equivalent Os(3)Sn6 octahedra,  a cornercorner with one O(1)Sn4 tetrahedra, corners with three equivalent O(6)Sn4 tetrahedra, and corners with three equivalent O(8)Sn4 trigonal pyramids. The corner-sharing octahedral tilt angles are 43°. In the second Os site, Os(2) is bonded to one Sn(11), one Sn(7), two equivalent Sn(1), and two equivalent Sn(2) atoms to form OsSn6 octahedra that share corners with two equivalent Os(1)Sn6 octahedra,  a cornercorner with one O(6)Sn4 tetrahedra,  a cornercorner with one O(7)Sn4 tetrahedra, corners with two equivalent O(9)Sn4 tetrahedra, corners with three equivalent O(1)Sn4 tetrahedra, and  an edgeedge with one O(8)Sn4 trigonal pyramid. The corner-sharing octahedral tilt angles are 43°. In the third Os site, Os(3) is bonded to one Sn(10), one Sn(9), two equivalent Sn(4), and two equivalent Sn(8) atoms to form OsSn6 octahedra that share corners with two equivalent Os(1)Sn6 octahedra, corners with two equivalent O(7)Sn4 tetrahedra, corners with four equivalent O(9)Sn4 tetrahedra,  a cornercorner with one O(8)Sn4 trigonal pyramid, and  an edgeedge with one O(6)Sn4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. There are eleven inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 4-coordinate geometry to one Os(1), one Os(2), one O(10), and one O(8) atom. In the second Sn site, Sn(2) is bonded in a 5-coordinate geometry to one Os(2), one O(1), one O(3), one O(5), and one O(9) atom. In the third Sn site, Sn(3) is bonded in a distorted T-shaped geometry to one O(7) and two equivalent O(9) atoms. In the fourth Sn site, Sn(4) is bonded in a 4-coordinate geometry to one Os(1), one Os(3), one O(2), and one O(6) atom. In the fifth Sn site, Sn(5) is bonded in a 5-coordinate geometry to one Os(1), one O(1), one O(8), and two equivalent O(10) atoms. In the sixth Sn site, Sn(6) is bonded in a 4-coordinate geometry to one Os(1), one O(6), and two equivalent O(2) atoms. In the seventh Sn site, Sn(7) is bonded in a 5-coordinate geometry to one Os(2), one O(1), one O(7), and two equivalent O(3) atoms. In the eighth Sn site, Sn(8) is bonded in a 5-coordinate geometry to one Os(3), one O(3), one O(4), one O(7), and one O(9) atom. In the ninth Sn site, Sn(9) is bonded in a 5-coordinate geometry to one Os(3), one O(4), one O(5), and two equivalent O(9) atoms. In the tenth Sn site, Sn(10) is bonded in a 3-coordinate geometry to one Os(3), one O(8), and two equivalent O(2) atoms. In the eleventh Sn site, Sn(11) is bonded in a 3-coordinate geometry to one Os(2), one O(6), and two equivalent O(10) atoms. There are ten inequivalent O sites. In the first O site, O(1) is bonded to one Sn(5), one Sn(7), and two equivalent Sn(2) atoms to form distorted OSn4 tetrahedra that share  a cornercorner with one Os(1)Sn6 octahedra, corners with three equivalent Os(2)Sn6 octahedra,  a cornercorner with one O(7)Sn4 tetrahedra, corners with two equivalent O(9)Sn4 tetrahedra, and  a cornercorner with one O(8)Sn4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 61-64°. In the second O site, O(2) is bonded in a trigonal planar geometry to one Sn(10), one Sn(4), and one Sn(6) atom. In the third O site, O(3) is bonded in a trigonal non-coplanar geometry to one Sn(2), one Sn(7), and one Sn(8) atom. In the fourth O site, O(4) is bonded in a trigonal non-coplanar geometry to one Sn(9) and two equivalent Sn(8) atoms. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Sn(9) and two equivalent Sn(2) atoms. In the sixth O site, O(6) is bonded to one Sn(11), one Sn(6), and two equivalent Sn(4) atoms to form distorted OSn4 tetrahedra that share  a cornercorner with one Os(2)Sn6 octahedra, corners with three equivalent Os(1)Sn6 octahedra, and  an edgeedge with one Os(3)Sn6 octahedra. The corner-sharing octahedral tilt angles range from 50-70°. In the seventh O site, O(7) is bonded to one Sn(3), one Sn(7), and two equivalent Sn(8) atoms to form distorted OSn4 tetrahedra that share  a cornercorner with one Os(2)Sn6 octahedra, corners with two equivalent Os(3)Sn6 octahedra,  a cornercorner with one O(1)Sn4 tetrahedra, and corners with four equivalent O(9)Sn4 tetrahedra. The corner-sharing octahedral tilt angles range from 64-69°. In the eighth O site, O(8) is bonded to one Sn(10), one Sn(5), and two equivalent Sn(1) atoms to form distorted OSn4 trigonal pyramids that share  a cornercorner with one Os(3)Sn6 octahedra, corners with three equivalent Os(1)Sn6 octahedra,  a cornercorner with one O(1)Sn4 tetrahedra, and  an edgeedge with one Os(2)Sn6 octahedra. The corner-sharing octahedral tilt angles range from 52-68°. In the ninth O site, O(9) is bonded to one Sn(2), one Sn(3), one Sn(8), and one Sn(9) atom to form distorted OSn4 tetrahedra that share  a cornercorner with one Os(2)Sn6 octahedra, corners with two equivalent Os(3)Sn6 octahedra,  a cornercorner with one O(1)Sn4 tetrahedra, corners with two equivalent O(7)Sn4 tetrahedra, and corners with two equivalent O(9)Sn4 tetrahedra. The corner-sharing octahedral tilt angles range from 64-65°. In the tenth O site, O(10) is bonded in a trigonal planar geometry to one Sn(1), one Sn(11), and one Sn(5) atom.
Os3Sn15O14 crystallizes in the monoclinic Cm space group. There are three inequivalent Os sites. In the first Os site, Os(1) is bonded to one Sn(5), one Sn(6), two equivalent Sn(1), and two equivalent Sn(4) atoms to form OsSn6 octahedra that share corners with two equivalent Os(2)Sn6 octahedra, corners with two equivalent Os(3)Sn6 octahedra,  a cornercorner with one O(1)Sn4 tetrahedra, corners with three equivalent O(6)Sn4 tetrahedra, and corners with three equivalent O(8)Sn4 trigonal pyramids. The corner-sharing octahedral tilt angles are 43°. The Os(1)-Sn(5) bond length is 2.62 Å. The Os(1)-Sn(6) bond length is 2.57 Å. Both Os(1)-Sn(1) bond lengths are 2.61 Å. Both Os(1)-Sn(4) bond lengths are 2.62 Å. In the second Os site, Os(2) is bonded to one Sn(11), one Sn(7), two equivalent Sn(1), and two equivalent Sn(2) atoms to form OsSn6 octahedra that share corners with two equivalent Os(1)Sn6 octahedra,  a cornercorner with one O(6)Sn4 tetrahedra,  a cornercorner with one O(7)Sn4 tetrahedra, corners with two equivalent O(9)Sn4 tetrahedra, corners with three equivalent O(1)Sn4 tetrahedra, and  an edgeedge with one O(8)Sn4 trigonal pyramid. The corner-sharing octahedral tilt angles are 43°. The Os(2)-Sn(11) bond length is 2.54 Å. The Os(2)-Sn(7) bond length is 2.57 Å. Both Os(2)-Sn(1) bond lengths are 2.61 Å. Both Os(2)-Sn(2) bond lengths are 2.57 Å. In the third Os site, Os(3) is bonded to one Sn(10), one Sn(9), two equivalent Sn(4), and two equivalent Sn(8) atoms to form OsSn6 octahedra that share corners with two equivalent Os(1)Sn6 octahedra, corners with two equivalent O(7)Sn4 tetrahedra, corners with four equivalent O(9)Sn4 tetrahedra,  a cornercorner with one O(8)Sn4 trigonal pyramid, and  an edgeedge with one O(6)Sn4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. The Os(3)-Sn(10) bond length is 2.58 Å. The Os(3)-Sn(9) bond length is 2.58 Å. Both Os(3)-Sn(4) bond lengths are 2.65 Å. Both Os(3)-Sn(8) bond lengths are 2.60 Å. There are eleven inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 4-coordinate geometry to one Os(1), one Os(2), one O(10), and one O(8) atom. The Sn(1)-O(10) bond length is 2.13 Å. The Sn(1)-O(8) bond length is 2.33 Å. In the second Sn site, Sn(2) is bonded in a 5-coordinate geometry to one Os(2), one O(1), one O(3), one O(5), and one O(9) atom. The Sn(2)-O(1) bond length is 2.31 Å. The Sn(2)-O(3) bond length is 2.07 Å. The Sn(2)-O(5) bond length is 2.06 Å. The Sn(2)-O(9) bond length is 2.32 Å. In the third Sn site, Sn(3) is bonded in a distorted T-shaped geometry to one O(7) and two equivalent O(9) atoms. The Sn(3)-O(7) bond length is 2.07 Å. Both Sn(3)-O(9) bond lengths are 2.09 Å. In the fourth Sn site, Sn(4) is bonded in a 4-coordinate geometry to one Os(1), one Os(3), one O(2), and one O(6) atom. The Sn(4)-O(2) bond length is 2.16 Å. The Sn(4)-O(6) bond length is 2.37 Å. In the fifth Sn site, Sn(5) is bonded in a 5-coordinate geometry to one Os(1), one O(1), one O(8), and two equivalent O(10) atoms. The Sn(5)-O(1) bond length is 2.13 Å. The Sn(5)-O(8) bond length is 2.31 Å. Both Sn(5)-O(10) bond lengths are 2.17 Å. In the sixth Sn site, Sn(6) is bonded in a 4-coordinate geometry to one Os(1), one O(6), and two equivalent O(2) atoms. The Sn(6)-O(6) bond length is 2.15 Å. Both Sn(6)-O(2) bond lengths are 2.10 Å. In the seventh Sn site, Sn(7) is bonded in a 5-coordinate geometry to one Os(2), one O(1), one O(7), and two equivalent O(3) atoms. The Sn(7)-O(1) bond length is 2.26 Å. The Sn(7)-O(7) bond length is 2.32 Å. Both Sn(7)-O(3) bond lengths are 2.07 Å. In the eighth Sn site, Sn(8) is bonded in a 5-coordinate geometry to one Os(3), one O(3), one O(4), one O(7), and one O(9) atom. The Sn(8)-O(3) bond length is 2.07 Å. The Sn(8)-O(4) bond length is 2.10 Å. The Sn(8)-O(7) bond length is 2.27 Å. The Sn(8)-O(9) bond length is 2.28 Å. In the ninth Sn site, Sn(9) is bonded in a 5-coordinate geometry to one Os(3), one O(4), one O(5), and two equivalent O(9) atoms. The Sn(9)-O(4) bond length is 2.10 Å. The Sn(9)-O(5) bond length is 2.08 Å. Both Sn(9)-O(9) bond lengths are 2.26 Å. In the tenth Sn site, Sn(10) is bonded in a 3-coordinate geometry to one Os(3), one O(8), and two equivalent O(2) atoms. The Sn(10)-O(8) bond length is 2.07 Å. Both Sn(10)-O(2) bond lengths are 2.08 Å. In the eleventh Sn site, Sn(11) is bonded in a 3-coordinate geometry to one Os(2), one O(6), and two equivalent O(10) atoms. The Sn(11)-O(6) bond length is 2.08 Å. Both Sn(11)-O(10) bond lengths are 2.04 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded to one Sn(5), one Sn(7), and two equivalent Sn(2) atoms to form distorted OSn4 tetrahedra that share  a cornercorner with one Os(1)Sn6 octahedra, corners with three equivalent Os(2)Sn6 octahedra,  a cornercorner with one O(7)Sn4 tetrahedra, corners with two equivalent O(9)Sn4 tetrahedra, and  a cornercorner with one O(8)Sn4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 61-64°. In the second O site, O(2) is bonded in a trigonal planar geometry to one Sn(10), one Sn(4), and one Sn(6) atom. In the third O site, O(3) is bonded in a trigonal non-coplanar geometry to one Sn(2), one Sn(7), and one Sn(8) atom. In the fourth O site, O(4) is bonded in a trigonal non-coplanar geometry to one Sn(9) and two equivalent Sn(8) atoms. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Sn(9) and two equivalent Sn(2) atoms. In the sixth O site, O(6) is bonded to one Sn(11), one Sn(6), and two equivalent Sn(4) atoms to form distorted OSn4 tetrahedra that share  a cornercorner with one Os(2)Sn6 octahedra, corners with three equivalent Os(1)Sn6 octahedra, and  an edgeedge with one Os(3)Sn6 octahedra. The corner-sharing octahedral tilt angles range from 50-70°. In the seventh O site, O(7) is bonded to one Sn(3), one Sn(7), and two equivalent Sn(8) atoms to form distorted OSn4 tetrahedra that share  a cornercorner with one Os(2)Sn6 octahedra, corners with two equivalent Os(3)Sn6 octahedra,  a cornercorner with one O(1)Sn4 tetrahedra, and corners with four equivalent O(9)Sn4 tetrahedra. The corner-sharing octahedral tilt angles range from 64-69°. In the eighth O site, O(8) is bonded to one Sn(10), one Sn(5), and two equivalent Sn(1) atoms to form distorted OSn4 trigonal pyramids that share  a cornercorner with one Os(3)Sn6 octahedra, corners with three equivalent Os(1)Sn6 octahedra,  a cornercorner with one O(1)Sn4 tetrahedra, and  an edgeedge with one Os(2)Sn6 octahedra. The corner-sharing octahedral tilt angles range from 52-68°. In the ninth O site, O(9) is bonded to one Sn(2), one Sn(3), one Sn(8), and one Sn(9) atom to form distorted OSn4 tetrahedra that share  a cornercorner with one Os(2)Sn6 octahedra, corners with two equivalent Os(3)Sn6 octahedra,  a cornercorner with one O(1)Sn4 tetrahedra, corners with two equivalent O(7)Sn4 tetrahedra, and corners with two equivalent O(9)Sn4 tetrahedra. The corner-sharing octahedral tilt angles range from 64-65°. In the tenth O site, O(10) is bonded in a trigonal planar geometry to one Sn(1), one Sn(11), and one Sn(5) atom.