NaV2O4 crystallizes in the triclinic P1 space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one O(13), one O(14), one O(15), one O(16), one O(5), and one O(6) atom. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(12), one O(7), one O(8), and one O(9) atom. In the third Na site, Na(3) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(12), one O(3), one O(4), and one O(9) atom. In the fourth Na site, Na(4) is bonded in a 6-coordinate geometry to one O(1), one O(13), one O(14), one O(15), one O(16), and one O(2) atom. There are eight inequivalent V sites. In the first V site, V(1) is bonded to one O(11), one O(13), one O(14), one O(2), one O(7), and one O(9) atom to form edge-sharing VO6 octahedra. In the second V site, V(2) is bonded to one O(11), one O(13), one O(14), one O(3), one O(6), and one O(9) atom to form edge-sharing VO6 octahedra. In the third V site, V(3) is bonded to one O(1), one O(12), one O(16), one O(4), one O(5), and one O(8) atom to form edge-sharing VO6 octahedra. In the fourth V site, V(4) is bonded to one O(1), one O(10), one O(15), one O(4), one O(5), and one O(8) atom to form edge-sharing VO6 octahedra. In the fifth V site, V(5) is bonded to one O(1), one O(10), one O(12), one O(15), one O(16), and one O(8) atom to form edge-sharing VO6 octahedra. In the sixth V site, V(6) is bonded to one O(10), one O(12), one O(15), one O(16), one O(4), and one O(5) atom to form edge-sharing VO6 octahedra. In the seventh V site, V(7) is bonded to one O(13), one O(2), one O(3), one O(6), one O(7), and one O(9) atom to form edge-sharing VO6 octahedra. In the eighth V site, V(8) is bonded to one O(11), one O(14), one O(2), one O(3), one O(6), and one O(7) atom to form edge-sharing VO6 octahedra. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Na(4), one V(3), one V(4), and one V(5) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Na(4), one V(1), one V(7), and one V(8) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Na(3), one V(2), one V(7), and one V(8) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Na(3), one V(3), one V(4), and one V(6) atom. In the fifth O site, O(5) is bonded to one Na(1), one V(3), one V(4), and one V(6) atom to form ONaV3 trigonal pyramids that share  a cornercorner with one O(13)Na2V3 trigonal bipyramid,  a cornercorner with one O(14)Na2V3 trigonal bipyramid,  a cornercorner with one O(15)Na2V3 trigonal bipyramid,  a cornercorner with one O(16)Na2V3 trigonal bipyramid,  a cornercorner with one O(6)NaV3 trigonal pyramid, corners with two equivalent O(8)NaV3 trigonal pyramids,  an edgeedge with one O(10)Na2V3 trigonal bipyramid,  an edgeedge with one O(12)Na2V3 trigonal bipyramid,  an edgeedge with one O(15)Na2V3 trigonal bipyramid, and  an edgeedge with one O(16)Na2V3 trigonal bipyramid. In the sixth O site, O(6) is bonded to one Na(1), one V(2), one V(7), and one V(8) atom to form ONaV3 trigonal pyramids that share  a cornercorner with one O(13)Na2V3 trigonal bipyramid,  a cornercorner with one O(14)Na2V3 trigonal bipyramid,  a cornercorner with one O(15)Na2V3 trigonal bipyramid,  a cornercorner with one O(16)Na2V3 trigonal bipyramid,  a cornercorner with one O(5)NaV3 trigonal pyramid, corners with two equivalent O(7)NaV3 trigonal pyramids,  an edgeedge with one O(11)Na2V3 trigonal bipyramid,  an edgeedge with one O(13)Na2V3 trigonal bipyramid,  an edgeedge with one O(14)Na2V3 trigonal bipyramid, and  an edgeedge with one O(9)Na2V3 trigonal bipyramid. In the seventh O site, O(7) is bonded to one Na(2), one V(1), one V(7), and one V(8) atom to form ONaV3 trigonal pyramids that share  a cornercorner with one O(10)Na2V3 trigonal bipyramid,  a cornercorner with one O(11)Na2V3 trigonal bipyramid,  a cornercorner with one O(12)Na2V3 trigonal bipyramid,  a cornercorner with one O(9)Na2V3 trigonal bipyramid,  a cornercorner with one O(8)NaV3 trigonal pyramid, corners with two equivalent O(6)NaV3 trigonal pyramids,  an edgeedge with one O(11)Na2V3 trigonal bipyramid,  an edgeedge with one O(13)Na2V3 trigonal bipyramid,  an edgeedge with one O(14)Na2V3 trigonal bipyramid, and  an edgeedge with one O(9)Na2V3 trigonal bipyramid. In the eighth O site, O(8) is bonded to one Na(2), one V(3), one V(4), and one V(5) atom to form ONaV3 trigonal pyramids that share  a cornercorner with one O(10)Na2V3 trigonal bipyramid,  a cornercorner with one O(11)Na2V3 trigonal bipyramid,  a cornercorner with one O(12)Na2V3 trigonal bipyramid,  a cornercorner with one O(9)Na2V3 trigonal bipyramid,  a cornercorner with one O(7)NaV3 trigonal pyramid, corners with two equivalent O(5)NaV3 trigonal pyramids,  an edgeedge with one O(10)Na2V3 trigonal bipyramid,  an edgeedge with one O(12)Na2V3 trigonal bipyramid,  an edgeedge with one O(15)Na2V3 trigonal bipyramid, and  an edgeedge with one O(16)Na2V3 trigonal bipyramid. In the ninth O site, O(9) is bonded to one Na(2), one Na(3), one V(1), one V(2), and one V(7) atom to form ONa2V3 trigonal bipyramids that share  a cornercorner with one O(13)Na2V3 trigonal bipyramid, corners with two equivalent O(12)Na2V3 trigonal bipyramids, corners with two equivalent O(14)Na2V3 trigonal bipyramids,  a cornercorner with one O(7)NaV3 trigonal pyramid,  a cornercorner with one O(8)NaV3 trigonal pyramid,  an edgeedge with one O(10)Na2V3 trigonal bipyramid,  an edgeedge with one O(13)Na2V3 trigonal bipyramid, edges with two equivalent O(11)Na2V3 trigonal bipyramids,  an edgeedge with one O(6)NaV3 trigonal pyramid, and  an edgeedge with one O(7)NaV3 trigonal pyramid. In the tenth O site, O(10) is bonded to one Na(2), one Na(3), one V(4), one V(5), and one V(6) atom to form ONa2V3 trigonal bipyramids that share  a cornercorner with one O(15)Na2V3 trigonal bipyramid, corners with two equivalent O(11)Na2V3 trigonal bipyramids, corners with two equivalent O(16)Na2V3 trigonal bipyramids,  a cornercorner with one O(7)NaV3 trigonal pyramid,  a cornercorner with one O(8)NaV3 trigonal pyramid,  an edgeedge with one O(15)Na2V3 trigonal bipyramid,  an edgeedge with one O(9)Na2V3 trigonal bipyramid, edges with two equivalent O(12)Na2V3 trigonal bipyramids,  an edgeedge with one O(5)NaV3 trigonal pyramid, and  an edgeedge with one O(8)NaV3 trigonal pyramid. In the eleventh O site, O(11) is bonded to one Na(2), one Na(3), one V(1), one V(2), and one V(8) atom to form ONa2V3 trigonal bipyramids that share  a cornercorner with one O(14)Na2V3 trigonal bipyramid, corners with two equivalent O(10)Na2V3 trigonal bipyramids, corners with two equivalent O(13)Na2V3 trigonal bipyramids,  a cornercorner with one O(7)NaV3 trigonal pyramid,  a cornercorner with one O(8)NaV3 trigonal pyramid,  an edgeedge with one O(12)Na2V3 trigonal bipyramid,  an edgeedge with one O(14)Na2V3 trigonal bipyramid, edges with two equivalent O(9)Na2V3 trigonal bipyramids,  an edgeedge with one O(6)NaV3 trigonal pyramid, and  an edgeedge with one O(7)NaV3 trigonal pyramid. In the twelfth O site, O(12) is bonded to one Na(2), one Na(3), one V(3), one V(5), and one V(6) atom to form ONa2V3 trigonal bipyramids that share  a cornercorner with one O(16)Na2V3 trigonal bipyramid, corners with two equivalent O(15)Na2V3 trigonal bipyramids, corners with two equivalent O(9)Na2V3 trigonal bipyramids,  a cornercorner with one O(7)NaV3 trigonal pyramid,  a cornercorner with one O(8)NaV3 trigonal pyramid,  an edgeedge with one O(11)Na2V3 trigonal bipyramid,  an edgeedge with one O(16)Na2V3 trigonal bipyramid, edges with two equivalent O(10)Na2V3 trigonal bipyramids,  an edgeedge with one O(5)NaV3 trigonal pyramid, and  an edgeedge with one O(8)NaV3 trigonal pyramid. In the thirteenth O site, O(13) is bonded to one Na(1), one Na(4), one V(1), one V(2), and one V(7) atom to form ONa2V3 trigonal bipyramids that share  a cornercorner with one O(9)Na2V3 trigonal bipyramid, corners with two equivalent O(11)Na2V3 trigonal bipyramids, corners with two equivalent O(16)Na2V3 trigonal bipyramids,  a cornercorner with one O(5)NaV3 trigonal pyramid,  a cornercorner with one O(6)NaV3 trigonal pyramid,  an edgeedge with one O(15)Na2V3 trigonal bipyramid,  an edgeedge with one O(9)Na2V3 trigonal bipyramid, edges with two equivalent O(14)Na2V3 trigonal bipyramids,  an edgeedge with one O(6)NaV3 trigonal pyramid, and  an edgeedge with one O(7)NaV3 trigonal pyramid. In the fourteenth O site, O(14) is bonded to one Na(1), one Na(4), one V(1), one V(2), and one V(8) atom to form ONa2V3 trigonal bipyramids that share  a cornercorner with one O(11)Na2V3 trigonal bipyramid, corners with two equivalent O(15)Na2V3 trigonal bipyramids, corners with two equivalent O(9)Na2V3 trigonal bipyramids,  a cornercorner with one O(5)NaV3 trigonal pyramid,  a cornercorner with one O(6)NaV3 trigonal pyramid,  an edgeedge with one O(11)Na2V3 trigonal bipyramid,  an edgeedge with one O(16)Na2V3 trigonal bipyramid, edges with two equivalent O(13)Na2V3 trigonal bipyramids,  an edgeedge with one O(6)NaV3 trigonal pyramid, and  an edgeedge with one O(7)NaV3 trigonal pyramid. In the fifteenth O site, O(15) is bonded to one Na(1), one Na(4), one V(4), one V(5), and one V(6) atom to form distorted ONa2V3 trigonal bipyramids that share  a cornercorner with one O(10)Na2V3 trigonal bipyramid, corners with two equivalent O(12)Na2V3 trigonal bipyramids, corners with two equivalent O(14)Na2V3 trigonal bipyramids,  a cornercorner with one O(5)NaV3 trigonal pyramid,  a cornercorner with one O(6)NaV3 trigonal pyramid,  an edgeedge with one O(10)Na2V3 trigonal bipyramid,  an edgeedge with one O(13)Na2V3 trigonal bipyramid, edges with two equivalent O(16)Na2V3 trigonal bipyramids,  an edgeedge with one O(5)NaV3 trigonal pyramid, and  an edgeedge with one O(8)NaV3 trigonal pyramid. In the sixteenth O site, O(16) is bonded to one Na(1), one Na(4), one V(3), one V(5), and one V(6) atom to form ONa2V3 trigonal bipyramids that share  a cornercorner with one O(12)Na2V3 trigonal bipyramid, corners with two equivalent O(10)Na2V3 trigonal bipyramids, corners with two equivalent O(13)Na2V3 trigonal bipyramids,  a cornercorner with one O(5)NaV3 trigonal pyramid,  a cornercorner with one O(6)NaV3 trigonal pyramid,  an edgeedge with one O(12)Na2V3 trigonal bipyramid,  an edgeedge with one O(14)Na2V3 trigonal bipyramid, edges with two equivalent O(15)Na2V3 trigonal bipyramids,  an edgeedge with one O(5)NaV3 trigonal pyramid, and  an edgeedge with one O(8)NaV3 trigonal pyramid.
NaV2O4 crystallizes in the triclinic P1 space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one O(13), one O(14), one O(15), one O(16), one O(5), and one O(6) atom. The Na(1)-O(13) bond length is 2.53 Å. The Na(1)-O(14) bond length is 2.51 Å. The Na(1)-O(15) bond length is 2.56 Å. The Na(1)-O(16) bond length is 2.51 Å. The Na(1)-O(5) bond length is 2.40 Å. The Na(1)-O(6) bond length is 2.41 Å. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(12), one O(7), one O(8), and one O(9) atom. The Na(2)-O(10) bond length is 2.51 Å. The Na(2)-O(11) bond length is 2.53 Å. The Na(2)-O(12) bond length is 2.51 Å. The Na(2)-O(7) bond length is 2.40 Å. The Na(2)-O(8) bond length is 2.40 Å. The Na(2)-O(9) bond length is 2.53 Å. In the third Na site, Na(3) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(12), one O(3), one O(4), and one O(9) atom. The Na(3)-O(10) bond length is 2.54 Å. The Na(3)-O(11) bond length is 2.56 Å. The Na(3)-O(12) bond length is 2.59 Å. The Na(3)-O(3) bond length is 2.47 Å. The Na(3)-O(4) bond length is 2.50 Å. The Na(3)-O(9) bond length is 2.55 Å. In the fourth Na site, Na(4) is bonded in a 6-coordinate geometry to one O(1), one O(13), one O(14), one O(15), one O(16), and one O(2) atom. The Na(4)-O(1) bond length is 2.43 Å. The Na(4)-O(13) bond length is 2.55 Å. The Na(4)-O(14) bond length is 2.55 Å. The Na(4)-O(15) bond length is 2.56 Å. The Na(4)-O(16) bond length is 2.55 Å. The Na(4)-O(2) bond length is 2.46 Å. There are eight inequivalent V sites. In the first V site, V(1) is bonded to one O(11), one O(13), one O(14), one O(2), one O(7), and one O(9) atom to form edge-sharing VO6 octahedra. The V(1)-O(11) bond length is 2.04 Å. The V(1)-O(13) bond length is 1.99 Å. The V(1)-O(14) bond length is 1.99 Å. The V(1)-O(2) bond length is 1.88 Å. The V(1)-O(7) bond length is 1.95 Å. The V(1)-O(9) bond length is 2.04 Å. In the second V site, V(2) is bonded to one O(11), one O(13), one O(14), one O(3), one O(6), and one O(9) atom to form edge-sharing VO6 octahedra. The V(2)-O(11) bond length is 1.99 Å. The V(2)-O(13) bond length is 2.04 Å. The V(2)-O(14) bond length is 2.04 Å. The V(2)-O(3) bond length is 1.88 Å. The V(2)-O(6) bond length is 1.96 Å. The V(2)-O(9) bond length is 1.99 Å. In the third V site, V(3) is bonded to one O(1), one O(12), one O(16), one O(4), one O(5), and one O(8) atom to form edge-sharing VO6 octahedra. The V(3)-O(1) bond length is 2.00 Å. The V(3)-O(12) bond length is 2.10 Å. The V(3)-O(16) bond length is 2.08 Å. The V(3)-O(4) bond length is 2.06 Å. The V(3)-O(5) bond length is 2.05 Å. The V(3)-O(8) bond length is 2.00 Å. In the fourth V site, V(4) is bonded to one O(1), one O(10), one O(15), one O(4), one O(5), and one O(8) atom to form edge-sharing VO6 octahedra. The V(4)-O(1) bond length is 2.01 Å. The V(4)-O(10) bond length is 2.06 Å. The V(4)-O(15) bond length is 2.11 Å. The V(4)-O(4) bond length is 2.06 Å. The V(4)-O(5) bond length is 2.04 Å. The V(4)-O(8) bond length is 2.00 Å. In the fifth V site, V(5) is bonded to one O(1), one O(10), one O(12), one O(15), one O(16), and one O(8) atom to form edge-sharing VO6 octahedra. The V(5)-O(1) bond length is 1.97 Å. The V(5)-O(10) bond length is 2.06 Å. The V(5)-O(12) bond length is 2.01 Å. The V(5)-O(15) bond length is 1.89 Å. The V(5)-O(16) bond length is 1.98 Å. The V(5)-O(8) bond length is 1.99 Å. In the sixth V site, V(6) is bonded to one O(10), one O(12), one O(15), one O(16), one O(4), and one O(5) atom to form edge-sharing VO6 octahedra. The V(6)-O(10) bond length is 1.99 Å. The V(6)-O(12) bond length is 1.99 Å. The V(6)-O(15) bond length is 2.10 Å. The V(6)-O(16) bond length is 2.04 Å. The V(6)-O(4) bond length is 1.89 Å. The V(6)-O(5) bond length is 1.93 Å. In the seventh V site, V(7) is bonded to one O(13), one O(2), one O(3), one O(6), one O(7), and one O(9) atom to form edge-sharing VO6 octahedra. The V(7)-O(13) bond length is 2.06 Å. The V(7)-O(2) bond length is 2.06 Å. The V(7)-O(3) bond length is 2.06 Å. The V(7)-O(6) bond length is 2.02 Å. The V(7)-O(7) bond length is 2.02 Å. The V(7)-O(9) bond length is 2.06 Å. In the eighth V site, V(8) is bonded to one O(11), one O(14), one O(2), one O(3), one O(6), and one O(7) atom to form edge-sharing VO6 octahedra. The V(8)-O(11) bond length is 2.06 Å. The V(8)-O(14) bond length is 2.06 Å. The V(8)-O(2) bond length is 2.05 Å. The V(8)-O(3) bond length is 2.05 Å. The V(8)-O(6) bond length is 2.03 Å. The V(8)-O(7) bond length is 2.03 Å. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Na(4), one V(3), one V(4), and one V(5) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Na(4), one V(1), one V(7), and one V(8) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Na(3), one V(2), one V(7), and one V(8) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Na(3), one V(3), one V(4), and one V(6) atom. In the fifth O site, O(5) is bonded to one Na(1), one V(3), one V(4), and one V(6) atom to form ONaV3 trigonal pyramids that share  a cornercorner with one O(13)Na2V3 trigonal bipyramid,  a cornercorner with one O(14)Na2V3 trigonal bipyramid,  a cornercorner with one O(15)Na2V3 trigonal bipyramid,  a cornercorner with one O(16)Na2V3 trigonal bipyramid,  a cornercorner with one O(6)NaV3 trigonal pyramid, corners with two equivalent O(8)NaV3 trigonal pyramids,  an edgeedge with one O(10)Na2V3 trigonal bipyramid,  an edgeedge with one O(12)Na2V3 trigonal bipyramid,  an edgeedge with one O(15)Na2V3 trigonal bipyramid, and  an edgeedge with one O(16)Na2V3 trigonal bipyramid. In the sixth O site, O(6) is bonded to one Na(1), one V(2), one V(7), and one V(8) atom to form ONaV3 trigonal pyramids that share  a cornercorner with one O(13)Na2V3 trigonal bipyramid,  a cornercorner with one O(14)Na2V3 trigonal bipyramid,  a cornercorner with one O(15)Na2V3 trigonal bipyramid,  a cornercorner with one O(16)Na2V3 trigonal bipyramid,  a cornercorner with one O(5)NaV3 trigonal pyramid, corners with two equivalent O(7)NaV3 trigonal pyramids,  an edgeedge with one O(11)Na2V3 trigonal bipyramid,  an edgeedge with one O(13)Na2V3 trigonal bipyramid,  an edgeedge with one O(14)Na2V3 trigonal bipyramid, and  an edgeedge with one O(9)Na2V3 trigonal bipyramid. In the seventh O site, O(7) is bonded to one Na(2), one V(1), one V(7), and one V(8) atom to form ONaV3 trigonal pyramids that share  a cornercorner with one O(10)Na2V3 trigonal bipyramid,  a cornercorner with one O(11)Na2V3 trigonal bipyramid,  a cornercorner with one O(12)Na2V3 trigonal bipyramid,  a cornercorner with one O(9)Na2V3 trigonal bipyramid,  a cornercorner with one O(8)NaV3 trigonal pyramid, corners with two equivalent O(6)NaV3 trigonal pyramids,  an edgeedge with one O(11)Na2V3 trigonal bipyramid,  an edgeedge with one O(13)Na2V3 trigonal bipyramid,  an edgeedge with one O(14)Na2V3 trigonal bipyramid, and  an edgeedge with one O(9)Na2V3 trigonal bipyramid. In the eighth O site, O(8) is bonded to one Na(2), one V(3), one V(4), and one V(5) atom to form ONaV3 trigonal pyramids that share  a cornercorner with one O(10)Na2V3 trigonal bipyramid,  a cornercorner with one O(11)Na2V3 trigonal bipyramid,  a cornercorner with one O(12)Na2V3 trigonal bipyramid,  a cornercorner with one O(9)Na2V3 trigonal bipyramid,  a cornercorner with one O(7)NaV3 trigonal pyramid, corners with two equivalent O(5)NaV3 trigonal pyramids,  an edgeedge with one O(10)Na2V3 trigonal bipyramid,  an edgeedge with one O(12)Na2V3 trigonal bipyramid,  an edgeedge with one O(15)Na2V3 trigonal bipyramid, and  an edgeedge with one O(16)Na2V3 trigonal bipyramid. In the ninth O site, O(9) is bonded to one Na(2), one Na(3), one V(1), one V(2), and one V(7) atom to form ONa2V3 trigonal bipyramids that share  a cornercorner with one O(13)Na2V3 trigonal bipyramid, corners with two equivalent O(12)Na2V3 trigonal bipyramids, corners with two equivalent O(14)Na2V3 trigonal bipyramids,  a cornercorner with one O(7)NaV3 trigonal pyramid,  a cornercorner with one O(8)NaV3 trigonal pyramid,  an edgeedge with one O(10)Na2V3 trigonal bipyramid,  an edgeedge with one O(13)Na2V3 trigonal bipyramid, edges with two equivalent O(11)Na2V3 trigonal bipyramids,  an edgeedge with one O(6)NaV3 trigonal pyramid, and  an edgeedge with one O(7)NaV3 trigonal pyramid. In the tenth O site, O(10) is bonded to one Na(2), one Na(3), one V(4), one V(5), and one V(6) atom to form ONa2V3 trigonal bipyramids that share  a cornercorner with one O(15)Na2V3 trigonal bipyramid, corners with two equivalent O(11)Na2V3 trigonal bipyramids, corners with two equivalent O(16)Na2V3 trigonal bipyramids,  a cornercorner with one O(7)NaV3 trigonal pyramid,  a cornercorner with one O(8)NaV3 trigonal pyramid,  an edgeedge with one O(15)Na2V3 trigonal bipyramid,  an edgeedge with one O(9)Na2V3 trigonal bipyramid, edges with two equivalent O(12)Na2V3 trigonal bipyramids,  an edgeedge with one O(5)NaV3 trigonal pyramid, and  an edgeedge with one O(8)NaV3 trigonal pyramid. In the eleventh O site, O(11) is bonded to one Na(2), one Na(3), one V(1), one V(2), and one V(8) atom to form ONa2V3 trigonal bipyramids that share  a cornercorner with one O(14)Na2V3 trigonal bipyramid, corners with two equivalent O(10)Na2V3 trigonal bipyramids, corners with two equivalent O(13)Na2V3 trigonal bipyramids,  a cornercorner with one O(7)NaV3 trigonal pyramid,  a cornercorner with one O(8)NaV3 trigonal pyramid,  an edgeedge with one O(12)Na2V3 trigonal bipyramid,  an edgeedge with one O(14)Na2V3 trigonal bipyramid, edges with two equivalent O(9)Na2V3 trigonal bipyramids,  an edgeedge with one O(6)NaV3 trigonal pyramid, and  an edgeedge with one O(7)NaV3 trigonal pyramid. In the twelfth O site, O(12) is bonded to one Na(2), one Na(3), one V(3), one V(5), and one V(6) atom to form ONa2V3 trigonal bipyramids that share  a cornercorner with one O(16)Na2V3 trigonal bipyramid, corners with two equivalent O(15)Na2V3 trigonal bipyramids, corners with two equivalent O(9)Na2V3 trigonal bipyramids,  a cornercorner with one O(7)NaV3 trigonal pyramid,  a cornercorner with one O(8)NaV3 trigonal pyramid,  an edgeedge with one O(11)Na2V3 trigonal bipyramid,  an edgeedge with one O(16)Na2V3 trigonal bipyramid, edges with two equivalent O(10)Na2V3 trigonal bipyramids,  an edgeedge with one O(5)NaV3 trigonal pyramid, and  an edgeedge with one O(8)NaV3 trigonal pyramid. In the thirteenth O site, O(13) is bonded to one Na(1), one Na(4), one V(1), one V(2), and one V(7) atom to form ONa2V3 trigonal bipyramids that share  a cornercorner with one O(9)Na2V3 trigonal bipyramid, corners with two equivalent O(11)Na2V3 trigonal bipyramids, corners with two equivalent O(16)Na2V3 trigonal bipyramids,  a cornercorner with one O(5)NaV3 trigonal pyramid,  a cornercorner with one O(6)NaV3 trigonal pyramid,  an edgeedge with one O(15)Na2V3 trigonal bipyramid,  an edgeedge with one O(9)Na2V3 trigonal bipyramid, edges with two equivalent O(14)Na2V3 trigonal bipyramids,  an edgeedge with one O(6)NaV3 trigonal pyramid, and  an edgeedge with one O(7)NaV3 trigonal pyramid. In the fourteenth O site, O(14) is bonded to one Na(1), one Na(4), one V(1), one V(2), and one V(8) atom to form ONa2V3 trigonal bipyramids that share  a cornercorner with one O(11)Na2V3 trigonal bipyramid, corners with two equivalent O(15)Na2V3 trigonal bipyramids, corners with two equivalent O(9)Na2V3 trigonal bipyramids,  a cornercorner with one O(5)NaV3 trigonal pyramid,  a cornercorner with one O(6)NaV3 trigonal pyramid,  an edgeedge with one O(11)Na2V3 trigonal bipyramid,  an edgeedge with one O(16)Na2V3 trigonal bipyramid, edges with two equivalent O(13)Na2V3 trigonal bipyramids,  an edgeedge with one O(6)NaV3 trigonal pyramid, and  an edgeedge with one O(7)NaV3 trigonal pyramid. In the fifteenth O site, O(15) is bonded to one Na(1), one Na(4), one V(4), one V(5), and one V(6) atom to form distorted ONa2V3 trigonal bipyramids that share  a cornercorner with one O(10)Na2V3 trigonal bipyramid, corners with two equivalent O(12)Na2V3 trigonal bipyramids, corners with two equivalent O(14)Na2V3 trigonal bipyramids,  a cornercorner with one O(5)NaV3 trigonal pyramid,  a cornercorner with one O(6)NaV3 trigonal pyramid,  an edgeedge with one O(10)Na2V3 trigonal bipyramid,  an edgeedge with one O(13)Na2V3 trigonal bipyramid, edges with two equivalent O(16)Na2V3 trigonal bipyramids,  an edgeedge with one O(5)NaV3 trigonal pyramid, and  an edgeedge with one O(8)NaV3 trigonal pyramid. In the sixteenth O site, O(16) is bonded to one Na(1), one Na(4), one V(3), one V(5), and one V(6) atom to form ONa2V3 trigonal bipyramids that share  a cornercorner with one O(12)Na2V3 trigonal bipyramid, corners with two equivalent O(10)Na2V3 trigonal bipyramids, corners with two equivalent O(13)Na2V3 trigonal bipyramids,  a cornercorner with one O(5)NaV3 trigonal pyramid,  a cornercorner with one O(6)NaV3 trigonal pyramid,  an edgeedge with one O(12)Na2V3 trigonal bipyramid,  an edgeedge with one O(14)Na2V3 trigonal bipyramid, edges with two equivalent O(15)Na2V3 trigonal bipyramids,  an edgeedge with one O(5)NaV3 trigonal pyramid, and  an edgeedge with one O(8)NaV3 trigonal pyramid.