Na3MoO4 is Enargite structured and crystallizes in the orthorhombic Pmn2_1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form NaO4 tetrahedra that share corners with four equivalent Na(1)O4 tetrahedra, corners with four equivalent Na(2)O4 tetrahedra, and corners with four equivalent Mo(1)O4 tetrahedra. In the second Na site, Na(2) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form NaO4 tetrahedra that share corners with four equivalent Mo(1)O4 tetrahedra and corners with eight equivalent Na(1)O4 tetrahedra. Mo(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form MoO4 tetrahedra that share corners with four equivalent Na(2)O4 tetrahedra and corners with eight equivalent Na(1)O4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Na(2), two equivalent Na(1), and one Mo(1) atom. In the second O site, O(2) is bonded to one Na(2), two equivalent Na(1), and one Mo(1) atom to form corner-sharing ONa3Mo trigonal pyramids. In the third O site, O(3) is bonded to one Na(2), two equivalent Na(1), and one Mo(1) atom to form corner-sharing ONa3Mo tetrahedra.
Na3MoO4 is Enargite structured and crystallizes in the orthorhombic Pmn2_1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form NaO4 tetrahedra that share corners with four equivalent Na(1)O4 tetrahedra, corners with four equivalent Na(2)O4 tetrahedra, and corners with four equivalent Mo(1)O4 tetrahedra. The Na(1)-O(2) bond length is 2.23 Å. The Na(1)-O(3) bond length is 2.29 Å. There is one shorter (2.30 Å) and one longer (2.33 Å) Na(1)-O(1) bond length. In the second Na site, Na(2) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form NaO4 tetrahedra that share corners with four equivalent Mo(1)O4 tetrahedra and corners with eight equivalent Na(1)O4 tetrahedra. The Na(2)-O(2) bond length is 2.37 Å. The Na(2)-O(3) bond length is 2.29 Å. Both Na(2)-O(1) bond lengths are 2.31 Å. Mo(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form MoO4 tetrahedra that share corners with four equivalent Na(2)O4 tetrahedra and corners with eight equivalent Na(1)O4 tetrahedra. The Mo(1)-O(2) bond length is 1.83 Å. The Mo(1)-O(3) bond length is 1.83 Å. Both Mo(1)-O(1) bond lengths are 1.84 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Na(2), two equivalent Na(1), and one Mo(1) atom. In the second O site, O(2) is bonded to one Na(2), two equivalent Na(1), and one Mo(1) atom to form corner-sharing ONa3Mo trigonal pyramids. In the third O site, O(3) is bonded to one Na(2), two equivalent Na(1), and one Mo(1) atom to form corner-sharing ONa3Mo tetrahedra.