Na7(WO3)8 crystallizes in the monoclinic C2/m space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded to two equivalent O(6), two equivalent O(8), four equivalent O(2), and four equivalent O(4) atoms to form NaO12 cuboctahedra that share corners with two equivalent Na(3)O12 cuboctahedra, corners with four equivalent Na(2)O12 cuboctahedra, corners with six equivalent Na(4)O12 cuboctahedra, faces with two equivalent Na(2)O12 cuboctahedra, faces with two equivalent Na(3)O12 cuboctahedra, faces with four equivalent W(1)O6 octahedra, and faces with four equivalent W(2)O6 octahedra. In the second Na site, Na(2) is bonded to one O(6), one O(7), one O(8), one O(9), four equivalent O(2), and four equivalent O(3) atoms to form NaO12 cuboctahedra that share corners with two equivalent Na(1)O12 cuboctahedra, corners with four equivalent Na(3)O12 cuboctahedra, corners with four equivalent Na(4)O12 cuboctahedra,  a faceface with one Na(1)O12 cuboctahedra,  a faceface with one Na(3)O12 cuboctahedra,  a faceface with one Na(4)O12 cuboctahedra, faces with two equivalent Na(2)O12 cuboctahedra, faces with four equivalent W(1)O6 octahedra, and faces with four equivalent W(2)O6 octahedra. In the third Na site, Na(3) is bonded to one O(7), one O(8), two equivalent O(1), two equivalent O(3), two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms to form NaO12 cuboctahedra that share  a cornercorner with one Na(1)O12 cuboctahedra, corners with two equivalent Na(3)O12 cuboctahedra, corners with two equivalent Na(4)O12 cuboctahedra, corners with four equivalent Na(2)O12 cuboctahedra,  a faceface with one Na(1)O12 cuboctahedra,  a faceface with one Na(2)O12 cuboctahedra,  a faceface with one Na(3)O12 cuboctahedra, faces with three equivalent Na(4)O12 cuboctahedra, faces with four equivalent W(1)O6 octahedra, and faces with four equivalent W(2)O6 octahedra. In the fourth Na site, Na(4) is bonded to one O(7), one O(8), two equivalent O(1), two equivalent O(3), two equivalent O(4), two equivalent O(5), and two equivalent O(9) atoms to form NaO12 cuboctahedra that share corners with two equivalent Na(3)O12 cuboctahedra, corners with two equivalent Na(4)O12 cuboctahedra, corners with three equivalent Na(1)O12 cuboctahedra, corners with four equivalent Na(2)O12 cuboctahedra,  a faceface with one Na(2)O12 cuboctahedra,  a faceface with one Na(4)O12 cuboctahedra, faces with three equivalent Na(3)O12 cuboctahedra, faces with four equivalent W(1)O6 octahedra, and faces with four equivalent W(2)O6 octahedra. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(6), and one O(9) atom to form WO6 octahedra that share corners with three equivalent W(1)O6 octahedra, corners with three equivalent W(2)O6 octahedra,  a faceface with one Na(1)O12 cuboctahedra, faces with two equivalent Na(2)O12 cuboctahedra, faces with two equivalent Na(3)O12 cuboctahedra, and faces with two equivalent Na(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the second W site, W(2) is bonded to one O(2), one O(3), one O(4), one O(5), one O(7), and one O(8) atom to form WO6 octahedra that share corners with three equivalent W(1)O6 octahedra, corners with three equivalent W(2)O6 octahedra,  a faceface with one Na(1)O12 cuboctahedra, faces with two equivalent Na(2)O12 cuboctahedra, faces with two equivalent Na(3)O12 cuboctahedra, and faces with two equivalent Na(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-2°. There are nine inequivalent O sites. In the first O site, O(3) is bonded to one Na(3), one Na(4), two equivalent Na(2), one W(1), and one W(2) atom to form distorted ONa4W2 octahedra that share corners with two equivalent O(1)Na4W2 octahedra, corners with two equivalent O(3)Na4W2 octahedra, corners with two equivalent O(5)Na4W2 octahedra, corners with two equivalent O(6)Na4W2 octahedra, corners with two equivalent O(8)Na4W2 octahedra, corners with two equivalent O(7)Na3W2 square pyramids, corners with two equivalent O(9)Na3W2 square pyramids, corners with four equivalent O(2)Na3W2 square pyramids, corners with four equivalent O(4)Na3W2 square pyramids, edges with three equivalent O(3)Na4W2 octahedra,  an edgeedge with one O(4)Na3W2 square pyramid,  a faceface with one O(1)Na4W2 octahedra,  a faceface with one O(5)Na4W2 octahedra,  a faceface with one O(6)Na4W2 octahedra,  a faceface with one O(8)Na4W2 octahedra,  a faceface with one O(7)Na3W2 square pyramid,  a faceface with one O(9)Na3W2 square pyramid, and faces with two equivalent O(2)Na3W2 square pyramids. The corner-sharing octahedral tilt angles range from 0-60°. In the second O site, O(4) is bonded to one Na(1), one Na(3), one Na(4), one W(1), and one W(2) atom to form distorted ONa3W2 square pyramids that share corners with two equivalent O(1)Na4W2 octahedra, corners with two equivalent O(5)Na4W2 octahedra, corners with two equivalent O(6)Na4W2 octahedra, corners with two equivalent O(8)Na4W2 octahedra, corners with four equivalent O(3)Na4W2 octahedra,  a cornercorner with one O(7)Na3W2 square pyramid,  a cornercorner with one O(9)Na3W2 square pyramid, corners with two equivalent O(2)Na3W2 square pyramids, corners with three equivalent O(4)Na3W2 square pyramids,  an edgeedge with one O(3)Na4W2 octahedra,  an edgeedge with one O(4)Na3W2 square pyramid,  an edgeedge with one O(7)Na3W2 square pyramid,  an edgeedge with one O(9)Na3W2 square pyramid, edges with two equivalent O(2)Na3W2 square pyramids,  a faceface with one O(1)Na4W2 octahedra,  a faceface with one O(5)Na4W2 octahedra,  a faceface with one O(6)Na4W2 octahedra, and  a faceface with one O(8)Na4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-60°. In the third O site, O(5) is bonded to two equivalent Na(3), two equivalent Na(4), and two equivalent W(2) atoms to form distorted ONa4W2 octahedra that share corners with four equivalent O(1)Na4W2 octahedra, corners with four equivalent O(3)Na4W2 octahedra, corners with four equivalent O(6)Na4W2 octahedra, corners with two equivalent O(2)Na3W2 square pyramids, corners with four equivalent O(4)Na3W2 square pyramids, corners with four equivalent O(9)Na3W2 square pyramids, edges with two equivalent O(1)Na4W2 octahedra, edges with two equivalent O(5)Na4W2 octahedra, faces with two equivalent O(3)Na4W2 octahedra, faces with two equivalent O(8)Na4W2 octahedra, faces with two equivalent O(4)Na3W2 square pyramids, and faces with two equivalent O(7)Na3W2 square pyramids. The corner-sharing octahedral tilt angles range from 0-60°. In the fourth O site, O(6) is bonded to one Na(1), one Na(2), two equivalent Na(3), and two equivalent W(1) atoms to form distorted ONa4W2 octahedra that share  a cornercorner with one O(6)Na4W2 octahedra,  a cornercorner with one O(8)Na4W2 octahedra, corners with four equivalent O(3)Na4W2 octahedra, corners with four equivalent O(5)Na4W2 octahedra,  a cornercorner with one O(7)Na3W2 square pyramid, corners with three equivalent O(9)Na3W2 square pyramids, corners with four equivalent O(2)Na3W2 square pyramids, corners with four equivalent O(4)Na3W2 square pyramids,  an edgeedge with one O(6)Na4W2 octahedra, edges with two equivalent O(8)Na4W2 octahedra,  an edgeedge with one O(7)Na3W2 square pyramid, faces with two equivalent O(1)Na4W2 octahedra, faces with two equivalent O(3)Na4W2 octahedra, faces with two equivalent O(2)Na3W2 square pyramids, and faces with two equivalent O(4)Na3W2 square pyramids. The corner-sharing octahedral tilt angles range from 0-60°. In the fifth O site, O(7) is bonded to one Na(2), one Na(3), one Na(4), and two equivalent W(2) atoms to form distorted ONa3W2 square pyramids that share  a cornercorner with one O(6)Na4W2 octahedra, corners with three equivalent O(8)Na4W2 octahedra, corners with four equivalent O(1)Na4W2 octahedra, corners with four equivalent O(3)Na4W2 octahedra, corners with two equivalent O(2)Na3W2 square pyramids, corners with two equivalent O(4)Na3W2 square pyramids, corners with three equivalent O(9)Na3W2 square pyramids,  an edgeedge with one O(6)Na4W2 octahedra,  an edgeedge with one O(8)Na4W2 octahedra, edges with two equivalent O(2)Na3W2 square pyramids, edges with two equivalent O(4)Na3W2 square pyramids, faces with two equivalent O(3)Na4W2 octahedra, and faces with two equivalent O(5)Na4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-60°. In the sixth O site, O(8) is bonded to one Na(1), one Na(2), one Na(3), one Na(4), and two equivalent W(2) atoms to form distorted ONa4W2 octahedra that share  a cornercorner with one O(6)Na4W2 octahedra,  a cornercorner with one O(8)Na4W2 octahedra, corners with four equivalent O(1)Na4W2 octahedra, corners with four equivalent O(3)Na4W2 octahedra,  a cornercorner with one O(9)Na3W2 square pyramid, corners with three equivalent O(7)Na3W2 square pyramids, corners with four equivalent O(2)Na3W2 square pyramids, corners with four equivalent O(4)Na3W2 square pyramids, edges with two equivalent O(6)Na4W2 octahedra,  an edgeedge with one O(7)Na3W2 square pyramid,  an edgeedge with one O(9)Na3W2 square pyramid, faces with two equivalent O(3)Na4W2 octahedra, faces with two equivalent O(5)Na4W2 octahedra, faces with two equivalent O(2)Na3W2 square pyramids, and faces with two equivalent O(4)Na3W2 square pyramids. The corner-sharing octahedral tilt angles range from 0-60°. In the seventh O site, O(9) is bonded to one Na(2), two equivalent Na(4), and two equivalent W(1) atoms to form distorted ONa3W2 square pyramids that share  a cornercorner with one O(8)Na4W2 octahedra, corners with three equivalent O(6)Na4W2 octahedra, corners with four equivalent O(3)Na4W2 octahedra, corners with four equivalent O(5)Na4W2 octahedra, corners with two equivalent O(2)Na3W2 square pyramids, corners with two equivalent O(4)Na3W2 square pyramids, corners with three equivalent O(7)Na3W2 square pyramids,  an edgeedge with one O(8)Na4W2 octahedra,  an edgeedge with one O(9)Na3W2 square pyramid, edges with two equivalent O(2)Na3W2 square pyramids, edges with two equivalent O(4)Na3W2 square pyramids, faces with two equivalent O(1)Na4W2 octahedra, and faces with two equivalent O(3)Na4W2 octahedra. The corner-sharing octahedral tilt angles range from 1-60°. In the eighth O site, O(1) is bonded to two equivalent Na(3), two equivalent Na(4), and two equivalent W(1) atoms to form distorted ONa4W2 octahedra that share corners with four equivalent O(3)Na4W2 octahedra, corners with four equivalent O(5)Na4W2 octahedra, corners with four equivalent O(8)Na4W2 octahedra, corners with two equivalent O(2)Na3W2 square pyramids, corners with four equivalent O(4)Na3W2 square pyramids, corners with four equivalent O(7)Na3W2 square pyramids, edges with two equivalent O(1)Na4W2 octahedra, edges with two equivalent O(5)Na4W2 octahedra, faces with two equivalent O(3)Na4W2 octahedra, faces with two equivalent O(6)Na4W2 octahedra, faces with two equivalent O(4)Na3W2 square pyramids, and faces with two equivalent O(9)Na3W2 square pyramids. The corner-sharing octahedral tilt angles range from 0-60°. In the ninth O site, O(2) is bonded to one Na(1), two equivalent Na(2), one W(1), and one W(2) atom to form distorted ONa3W2 square pyramids that share  a cornercorner with one O(1)Na4W2 octahedra,  a cornercorner with one O(5)Na4W2 octahedra, corners with two equivalent O(6)Na4W2 octahedra, corners with two equivalent O(8)Na4W2 octahedra, corners with four equivalent O(3)Na4W2 octahedra,  a cornercorner with one O(7)Na3W2 square pyramid,  a cornercorner with one O(9)Na3W2 square pyramid, corners with two equivalent O(4)Na3W2 square pyramids, corners with five equivalent O(2)Na3W2 square pyramids,  an edgeedge with one O(7)Na3W2 square pyramid,  an edgeedge with one O(9)Na3W2 square pyramid, edges with two equivalent O(2)Na3W2 square pyramids, edges with two equivalent O(4)Na3W2 square pyramids,  a faceface with one O(6)Na4W2 octahedra,  a faceface with one O(8)Na4W2 octahedra, and faces with two equivalent O(3)Na4W2 octahedra. The corner-sharing octahedral tilt angles range from 1-60°.
Na7(WO3)8 crystallizes in the monoclinic C2/m space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded to two equivalent O(6), two equivalent O(8), four equivalent O(2), and four equivalent O(4) atoms to form NaO12 cuboctahedra that share corners with two equivalent Na(3)O12 cuboctahedra, corners with four equivalent Na(2)O12 cuboctahedra, corners with six equivalent Na(4)O12 cuboctahedra, faces with two equivalent Na(2)O12 cuboctahedra, faces with two equivalent Na(3)O12 cuboctahedra, faces with four equivalent W(1)O6 octahedra, and faces with four equivalent W(2)O6 octahedra. Both Na(1)-O(6) bond lengths are 2.78 Å. Both Na(1)-O(8) bond lengths are 2.78 Å. All Na(1)-O(2) bond lengths are 2.79 Å. All Na(1)-O(4) bond lengths are 2.79 Å. In the second Na site, Na(2) is bonded to one O(6), one O(7), one O(8), one O(9), four equivalent O(2), and four equivalent O(3) atoms to form NaO12 cuboctahedra that share corners with two equivalent Na(1)O12 cuboctahedra, corners with four equivalent Na(3)O12 cuboctahedra, corners with four equivalent Na(4)O12 cuboctahedra,  a faceface with one Na(1)O12 cuboctahedra,  a faceface with one Na(3)O12 cuboctahedra,  a faceface with one Na(4)O12 cuboctahedra, faces with two equivalent Na(2)O12 cuboctahedra, faces with four equivalent W(1)O6 octahedra, and faces with four equivalent W(2)O6 octahedra. The Na(2)-O(6) bond length is 2.79 Å. The Na(2)-O(7) bond length is 2.78 Å. The Na(2)-O(8) bond length is 2.79 Å. The Na(2)-O(9) bond length is 2.78 Å. There are two shorter (2.77 Å) and two longer (2.78 Å) Na(2)-O(2) bond lengths. All Na(2)-O(3) bond lengths are 2.78 Å. In the third Na site, Na(3) is bonded to one O(7), one O(8), two equivalent O(1), two equivalent O(3), two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms to form NaO12 cuboctahedra that share  a cornercorner with one Na(1)O12 cuboctahedra, corners with two equivalent Na(3)O12 cuboctahedra, corners with two equivalent Na(4)O12 cuboctahedra, corners with four equivalent Na(2)O12 cuboctahedra,  a faceface with one Na(1)O12 cuboctahedra,  a faceface with one Na(2)O12 cuboctahedra,  a faceface with one Na(3)O12 cuboctahedra, faces with three equivalent Na(4)O12 cuboctahedra, faces with four equivalent W(1)O6 octahedra, and faces with four equivalent W(2)O6 octahedra. The Na(3)-O(7) bond length is 2.76 Å. The Na(3)-O(8) bond length is 2.79 Å. Both Na(3)-O(1) bond lengths are 2.79 Å. Both Na(3)-O(3) bond lengths are 2.79 Å. Both Na(3)-O(4) bond lengths are 2.76 Å. Both Na(3)-O(5) bond lengths are 2.79 Å. There is one shorter (2.78 Å) and one longer (2.79 Å) Na(3)-O(6) bond length. In the fourth Na site, Na(4) is bonded to one O(7), one O(8), two equivalent O(1), two equivalent O(3), two equivalent O(4), two equivalent O(5), and two equivalent O(9) atoms to form NaO12 cuboctahedra that share corners with two equivalent Na(3)O12 cuboctahedra, corners with two equivalent Na(4)O12 cuboctahedra, corners with three equivalent Na(1)O12 cuboctahedra, corners with four equivalent Na(2)O12 cuboctahedra,  a faceface with one Na(2)O12 cuboctahedra,  a faceface with one Na(4)O12 cuboctahedra, faces with three equivalent Na(3)O12 cuboctahedra, faces with four equivalent W(1)O6 octahedra, and faces with four equivalent W(2)O6 octahedra. The Na(4)-O(7) bond length is 2.78 Å. The Na(4)-O(8) bond length is 2.79 Å. Both Na(4)-O(1) bond lengths are 2.78 Å. Both Na(4)-O(3) bond lengths are 2.79 Å. Both Na(4)-O(4) bond lengths are 2.78 Å. Both Na(4)-O(5) bond lengths are 2.78 Å. There is one shorter (2.77 Å) and one longer (2.78 Å) Na(4)-O(9) bond length. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(6), and one O(9) atom to form WO6 octahedra that share corners with three equivalent W(1)O6 octahedra, corners with three equivalent W(2)O6 octahedra,  a faceface with one Na(1)O12 cuboctahedra, faces with two equivalent Na(2)O12 cuboctahedra, faces with two equivalent Na(3)O12 cuboctahedra, and faces with two equivalent Na(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-2°. The W(1)-O(1) bond length is 1.98 Å. The W(1)-O(2) bond length is 1.96 Å. The W(1)-O(3) bond length is 1.98 Å. The W(1)-O(4) bond length is 1.96 Å. The W(1)-O(6) bond length is 1.98 Å. The W(1)-O(9) bond length is 1.96 Å. In the second W site, W(2) is bonded to one O(2), one O(3), one O(4), one O(5), one O(7), and one O(8) atom to form WO6 octahedra that share corners with three equivalent W(1)O6 octahedra, corners with three equivalent W(2)O6 octahedra,  a faceface with one Na(1)O12 cuboctahedra, faces with two equivalent Na(2)O12 cuboctahedra, faces with two equivalent Na(3)O12 cuboctahedra, and faces with two equivalent Na(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-2°. The W(2)-O(2) bond length is 1.96 Å. The W(2)-O(3) bond length is 1.98 Å. The W(2)-O(4) bond length is 1.96 Å. The W(2)-O(5) bond length is 1.98 Å. The W(2)-O(7) bond length is 1.96 Å. The W(2)-O(8) bond length is 1.98 Å. There are nine inequivalent O sites. In the first O site, O(3) is bonded to one Na(3), one Na(4), two equivalent Na(2), one W(1), and one W(2) atom to form distorted ONa4W2 octahedra that share corners with two equivalent O(1)Na4W2 octahedra, corners with two equivalent O(3)Na4W2 octahedra, corners with two equivalent O(5)Na4W2 octahedra, corners with two equivalent O(6)Na4W2 octahedra, corners with two equivalent O(8)Na4W2 octahedra, corners with two equivalent O(7)Na3W2 square pyramids, corners with two equivalent O(9)Na3W2 square pyramids, corners with four equivalent O(2)Na3W2 square pyramids, corners with four equivalent O(4)Na3W2 square pyramids, edges with three equivalent O(3)Na4W2 octahedra,  an edgeedge with one O(4)Na3W2 square pyramid,  a faceface with one O(1)Na4W2 octahedra,  a faceface with one O(5)Na4W2 octahedra,  a faceface with one O(6)Na4W2 octahedra,  a faceface with one O(8)Na4W2 octahedra,  a faceface with one O(7)Na3W2 square pyramid,  a faceface with one O(9)Na3W2 square pyramid, and faces with two equivalent O(2)Na3W2 square pyramids. The corner-sharing octahedral tilt angles range from 0-60°. In the second O site, O(4) is bonded to one Na(1), one Na(3), one Na(4), one W(1), and one W(2) atom to form distorted ONa3W2 square pyramids that share corners with two equivalent O(1)Na4W2 octahedra, corners with two equivalent O(5)Na4W2 octahedra, corners with two equivalent O(6)Na4W2 octahedra, corners with two equivalent O(8)Na4W2 octahedra, corners with four equivalent O(3)Na4W2 octahedra,  a cornercorner with one O(7)Na3W2 square pyramid,  a cornercorner with one O(9)Na3W2 square pyramid, corners with two equivalent O(2)Na3W2 square pyramids, corners with three equivalent O(4)Na3W2 square pyramids,  an edgeedge with one O(3)Na4W2 octahedra,  an edgeedge with one O(4)Na3W2 square pyramid,  an edgeedge with one O(7)Na3W2 square pyramid,  an edgeedge with one O(9)Na3W2 square pyramid, edges with two equivalent O(2)Na3W2 square pyramids,  a faceface with one O(1)Na4W2 octahedra,  a faceface with one O(5)Na4W2 octahedra,  a faceface with one O(6)Na4W2 octahedra, and  a faceface with one O(8)Na4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-60°. In the third O site, O(5) is bonded to two equivalent Na(3), two equivalent Na(4), and two equivalent W(2) atoms to form distorted ONa4W2 octahedra that share corners with four equivalent O(1)Na4W2 octahedra, corners with four equivalent O(3)Na4W2 octahedra, corners with four equivalent O(6)Na4W2 octahedra, corners with two equivalent O(2)Na3W2 square pyramids, corners with four equivalent O(4)Na3W2 square pyramids, corners with four equivalent O(9)Na3W2 square pyramids, edges with two equivalent O(1)Na4W2 octahedra, edges with two equivalent O(5)Na4W2 octahedra, faces with two equivalent O(3)Na4W2 octahedra, faces with two equivalent O(8)Na4W2 octahedra, faces with two equivalent O(4)Na3W2 square pyramids, and faces with two equivalent O(7)Na3W2 square pyramids. The corner-sharing octahedral tilt angles range from 0-60°. In the fourth O site, O(6) is bonded to one Na(1), one Na(2), two equivalent Na(3), and two equivalent W(1) atoms to form distorted ONa4W2 octahedra that share  a cornercorner with one O(6)Na4W2 octahedra,  a cornercorner with one O(8)Na4W2 octahedra, corners with four equivalent O(3)Na4W2 octahedra, corners with four equivalent O(5)Na4W2 octahedra,  a cornercorner with one O(7)Na3W2 square pyramid, corners with three equivalent O(9)Na3W2 square pyramids, corners with four equivalent O(2)Na3W2 square pyramids, corners with four equivalent O(4)Na3W2 square pyramids,  an edgeedge with one O(6)Na4W2 octahedra, edges with two equivalent O(8)Na4W2 octahedra,  an edgeedge with one O(7)Na3W2 square pyramid, faces with two equivalent O(1)Na4W2 octahedra, faces with two equivalent O(3)Na4W2 octahedra, faces with two equivalent O(2)Na3W2 square pyramids, and faces with two equivalent O(4)Na3W2 square pyramids. The corner-sharing octahedral tilt angles range from 0-60°. In the fifth O site, O(7) is bonded to one Na(2), one Na(3), one Na(4), and two equivalent W(2) atoms to form distorted ONa3W2 square pyramids that share  a cornercorner with one O(6)Na4W2 octahedra, corners with three equivalent O(8)Na4W2 octahedra, corners with four equivalent O(1)Na4W2 octahedra, corners with four equivalent O(3)Na4W2 octahedra, corners with two equivalent O(2)Na3W2 square pyramids, corners with two equivalent O(4)Na3W2 square pyramids, corners with three equivalent O(9)Na3W2 square pyramids,  an edgeedge with one O(6)Na4W2 octahedra,  an edgeedge with one O(8)Na4W2 octahedra, edges with two equivalent O(2)Na3W2 square pyramids, edges with two equivalent O(4)Na3W2 square pyramids, faces with two equivalent O(3)Na4W2 octahedra, and faces with two equivalent O(5)Na4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-60°. In the sixth O site, O(8) is bonded to one Na(1), one Na(2), one Na(3), one Na(4), and two equivalent W(2) atoms to form distorted ONa4W2 octahedra that share  a cornercorner with one O(6)Na4W2 octahedra,  a cornercorner with one O(8)Na4W2 octahedra, corners with four equivalent O(1)Na4W2 octahedra, corners with four equivalent O(3)Na4W2 octahedra,  a cornercorner with one O(9)Na3W2 square pyramid, corners with three equivalent O(7)Na3W2 square pyramids, corners with four equivalent O(2)Na3W2 square pyramids, corners with four equivalent O(4)Na3W2 square pyramids, edges with two equivalent O(6)Na4W2 octahedra,  an edgeedge with one O(7)Na3W2 square pyramid,  an edgeedge with one O(9)Na3W2 square pyramid, faces with two equivalent O(3)Na4W2 octahedra, faces with two equivalent O(5)Na4W2 octahedra, faces with two equivalent O(2)Na3W2 square pyramids, and faces with two equivalent O(4)Na3W2 square pyramids. The corner-sharing octahedral tilt angles range from 0-60°. In the seventh O site, O(9) is bonded to one Na(2), two equivalent Na(4), and two equivalent W(1) atoms to form distorted ONa3W2 square pyramids that share  a cornercorner with one O(8)Na4W2 octahedra, corners with three equivalent O(6)Na4W2 octahedra, corners with four equivalent O(3)Na4W2 octahedra, corners with four equivalent O(5)Na4W2 octahedra, corners with two equivalent O(2)Na3W2 square pyramids, corners with two equivalent O(4)Na3W2 square pyramids, corners with three equivalent O(7)Na3W2 square pyramids,  an edgeedge with one O(8)Na4W2 octahedra,  an edgeedge with one O(9)Na3W2 square pyramid, edges with two equivalent O(2)Na3W2 square pyramids, edges with two equivalent O(4)Na3W2 square pyramids, faces with two equivalent O(1)Na4W2 octahedra, and faces with two equivalent O(3)Na4W2 octahedra. The corner-sharing octahedral tilt angles range from 1-60°. In the eighth O site, O(1) is bonded to two equivalent Na(3), two equivalent Na(4), and two equivalent W(1) atoms to form distorted ONa4W2 octahedra that share corners with four equivalent O(3)Na4W2 octahedra, corners with four equivalent O(5)Na4W2 octahedra, corners with four equivalent O(8)Na4W2 octahedra, corners with two equivalent O(2)Na3W2 square pyramids, corners with four equivalent O(4)Na3W2 square pyramids, corners with four equivalent O(7)Na3W2 square pyramids, edges with two equivalent O(1)Na4W2 octahedra, edges with two equivalent O(5)Na4W2 octahedra, faces with two equivalent O(3)Na4W2 octahedra, faces with two equivalent O(6)Na4W2 octahedra, faces with two equivalent O(4)Na3W2 square pyramids, and faces with two equivalent O(9)Na3W2 square pyramids. The corner-sharing octahedral tilt angles range from 0-60°. In the ninth O site, O(2) is bonded to one Na(1), two equivalent Na(2), one W(1), and one W(2) atom to form distorted ONa3W2 square pyramids that share  a cornercorner with one O(1)Na4W2 octahedra,  a cornercorner with one O(5)Na4W2 octahedra, corners with two equivalent O(6)Na4W2 octahedra, corners with two equivalent O(8)Na4W2 octahedra, corners with four equivalent O(3)Na4W2 octahedra,  a cornercorner with one O(7)Na3W2 square pyramid,  a cornercorner with one O(9)Na3W2 square pyramid, corners with two equivalent O(4)Na3W2 square pyramids, corners with five equivalent O(2)Na3W2 square pyramids,  an edgeedge with one O(7)Na3W2 square pyramid,  an edgeedge with one O(9)Na3W2 square pyramid, edges with two equivalent O(2)Na3W2 square pyramids, edges with two equivalent O(4)Na3W2 square pyramids,  a faceface with one O(6)Na4W2 octahedra,  a faceface with one O(8)Na4W2 octahedra, and faces with two equivalent O(3)Na4W2 octahedra. The corner-sharing octahedral tilt angles range from 1-60°.