Na8MgMo2(NO)4 is Aluminum carbonitride-derived structured and crystallizes in the triclinic P1 space group. There are eight inequivalent Na sites. In the first Na site, Na(1) is bonded in a 4-coordinate geometry to one N(2), one O(1), one O(2), one O(3), and one O(4) atom. In the second Na site, Na(2) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(3), and one O(4) atom. In the third Na site, Na(3) is bonded in a 5-coordinate geometry to one N(1), one N(2), one N(3), one N(4), and one O(3) atom. In the fourth Na site, Na(4) is bonded in a 4-coordinate geometry to one N(1), one N(2), one N(3), and one N(4) atom. In the fifth Na site, Na(5) is bonded in a 4-coordinate geometry to one N(2), one N(3), one N(4), and one O(1) atom. In the sixth Na site, Na(6) is bonded to one N(1), one N(2), one N(3), and one N(4) atom to form distorted NaN4 tetrahedra that share corners with two equivalent Mo(1)N2O2 tetrahedra and corners with two equivalent Mo(2)N2O2 tetrahedra. In the seventh Na site, Na(7) is bonded in a 3-coordinate geometry to one N(1), one N(3), one O(3), and one O(4) atom. In the eighth Na site, Na(8) is bonded in a 4-coordinate geometry to one N(2), one N(4), one O(1), and one O(2) atom. Mg(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form distorted MgO4 trigonal pyramids that share corners with two equivalent Mo(2)N2O2 tetrahedra and  an edgeedge with one Mo(1)N2O2 tetrahedra. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to one N(2), one N(4), one O(1), and one O(4) atom to form distorted MoN2O2 tetrahedra that share corners with two equivalent Na(6)N4 tetrahedra and  an edgeedge with one Mg(1)O4 trigonal pyramid. In the second Mo site, Mo(2) is bonded to one N(1), one N(3), one O(2), and one O(3) atom to form MoN2O2 tetrahedra that share corners with two equivalent Na(6)N4 tetrahedra and corners with two equivalent Mg(1)O4 trigonal pyramids. There are four inequivalent N sites. In the first N site, N(1) is bonded in a 5-coordinate geometry to one Na(3), one Na(4), one Na(6), one Na(7), and one Mo(2) atom. In the second N site, N(2) is bonded in a 7-coordinate geometry to one Na(1), one Na(3), one Na(4), one Na(5), one Na(6), one Na(8), and one Mo(1) atom. In the third N site, N(3) is bonded in a 6-coordinate geometry to one Na(3), one Na(4), one Na(5), one Na(6), one Na(7), and one Mo(2) atom. In the fourth N site, N(4) is bonded to one Na(3), one Na(4), one Na(5), one Na(6), one Na(8), and one Mo(1) atom to form distorted NNa5Mo octahedra that share  a cornercorner with one O(4)Na3MgMo trigonal bipyramid. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Na(1), one Na(2), one Na(5), one Na(8), one Mg(1), and one Mo(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Na(1), one Na(2), one Na(8), one Mg(1), and one Mo(2) atom. In the third O site, O(3) is bonded in a 6-coordinate geometry to one Na(1), one Na(2), one Na(3), one Na(7), one Mg(1), and one Mo(2) atom. In the fourth O site, O(4) is bonded to one Na(1), one Na(2), one Na(7), one Mg(1), and one Mo(1) atom to form distorted ONa3MgMo trigonal bipyramids that share  a cornercorner with one N(4)Na5Mo octahedra. The corner-sharing octahedral tilt angles are 61°.
Na8MgMo2(NO)4 is Aluminum carbonitride-derived structured and crystallizes in the triclinic P1 space group. There are eight inequivalent Na sites. In the first Na site, Na(1) is bonded in a 4-coordinate geometry to one N(2), one O(1), one O(2), one O(3), and one O(4) atom. The Na(1)-N(2) bond length is 2.78 Å. The Na(1)-O(1) bond length is 2.36 Å. The Na(1)-O(2) bond length is 2.42 Å. The Na(1)-O(3) bond length is 2.31 Å. The Na(1)-O(4) bond length is 2.28 Å. In the second Na site, Na(2) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(3), and one O(4) atom. The Na(2)-O(1) bond length is 2.57 Å. The Na(2)-O(2) bond length is 2.59 Å. The Na(2)-O(3) bond length is 2.90 Å. The Na(2)-O(4) bond length is 2.41 Å. In the third Na site, Na(3) is bonded in a 5-coordinate geometry to one N(1), one N(2), one N(3), one N(4), and one O(3) atom. The Na(3)-N(1) bond length is 2.49 Å. The Na(3)-N(2) bond length is 2.83 Å. The Na(3)-N(3) bond length is 2.93 Å. The Na(3)-N(4) bond length is 2.49 Å. The Na(3)-O(3) bond length is 2.40 Å. In the fourth Na site, Na(4) is bonded in a 4-coordinate geometry to one N(1), one N(2), one N(3), and one N(4) atom. The Na(4)-N(1) bond length is 2.56 Å. The Na(4)-N(2) bond length is 2.52 Å. The Na(4)-N(3) bond length is 2.50 Å. The Na(4)-N(4) bond length is 2.42 Å. In the fifth Na site, Na(5) is bonded in a 4-coordinate geometry to one N(2), one N(3), one N(4), and one O(1) atom. The Na(5)-N(2) bond length is 2.50 Å. The Na(5)-N(3) bond length is 2.55 Å. The Na(5)-N(4) bond length is 2.50 Å. The Na(5)-O(1) bond length is 2.65 Å. In the sixth Na site, Na(6) is bonded to one N(1), one N(2), one N(3), and one N(4) atom to form distorted NaN4 tetrahedra that share corners with two equivalent Mo(1)N2O2 tetrahedra and corners with two equivalent Mo(2)N2O2 tetrahedra. The Na(6)-N(1) bond length is 2.39 Å. The Na(6)-N(2) bond length is 2.62 Å. The Na(6)-N(3) bond length is 2.34 Å. The Na(6)-N(4) bond length is 2.49 Å. In the seventh Na site, Na(7) is bonded in a 3-coordinate geometry to one N(1), one N(3), one O(3), and one O(4) atom. The Na(7)-N(1) bond length is 2.34 Å. The Na(7)-N(3) bond length is 2.38 Å. The Na(7)-O(3) bond length is 2.89 Å. The Na(7)-O(4) bond length is 2.40 Å. In the eighth Na site, Na(8) is bonded in a 4-coordinate geometry to one N(2), one N(4), one O(1), and one O(2) atom. The Na(8)-N(2) bond length is 2.41 Å. The Na(8)-N(4) bond length is 2.33 Å. The Na(8)-O(1) bond length is 2.55 Å. The Na(8)-O(2) bond length is 2.39 Å. Mg(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form distorted MgO4 trigonal pyramids that share corners with two equivalent Mo(2)N2O2 tetrahedra and  an edgeedge with one Mo(1)N2O2 tetrahedra. The Mg(1)-O(1) bond length is 2.15 Å. The Mg(1)-O(2) bond length is 2.03 Å. The Mg(1)-O(3) bond length is 1.97 Å. The Mg(1)-O(4) bond length is 2.00 Å. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to one N(2), one N(4), one O(1), and one O(4) atom to form distorted MoN2O2 tetrahedra that share corners with two equivalent Na(6)N4 tetrahedra and  an edgeedge with one Mg(1)O4 trigonal pyramid. The Mo(1)-N(2) bond length is 1.85 Å. The Mo(1)-N(4) bond length is 1.82 Å. The Mo(1)-O(1) bond length is 2.02 Å. The Mo(1)-O(4) bond length is 2.10 Å. In the second Mo site, Mo(2) is bonded to one N(1), one N(3), one O(2), and one O(3) atom to form MoN2O2 tetrahedra that share corners with two equivalent Na(6)N4 tetrahedra and corners with two equivalent Mg(1)O4 trigonal pyramids. The Mo(2)-N(1) bond length is 1.85 Å. The Mo(2)-N(3) bond length is 1.82 Å. The Mo(2)-O(2) bond length is 2.11 Å. The Mo(2)-O(3) bond length is 2.05 Å. There are four inequivalent N sites. In the first N site, N(1) is bonded in a 5-coordinate geometry to one Na(3), one Na(4), one Na(6), one Na(7), and one Mo(2) atom. In the second N site, N(2) is bonded in a 7-coordinate geometry to one Na(1), one Na(3), one Na(4), one Na(5), one Na(6), one Na(8), and one Mo(1) atom. In the third N site, N(3) is bonded in a 6-coordinate geometry to one Na(3), one Na(4), one Na(5), one Na(6), one Na(7), and one Mo(2) atom. In the fourth N site, N(4) is bonded to one Na(3), one Na(4), one Na(5), one Na(6), one Na(8), and one Mo(1) atom to form distorted NNa5Mo octahedra that share  a cornercorner with one O(4)Na3MgMo trigonal bipyramid. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Na(1), one Na(2), one Na(5), one Na(8), one Mg(1), and one Mo(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Na(1), one Na(2), one Na(8), one Mg(1), and one Mo(2) atom. In the third O site, O(3) is bonded in a 6-coordinate geometry to one Na(1), one Na(2), one Na(3), one Na(7), one Mg(1), and one Mo(2) atom. In the fourth O site, O(4) is bonded to one Na(1), one Na(2), one Na(7), one Mg(1), and one Mo(1) atom to form distorted ONa3MgMo trigonal bipyramids that share  a cornercorner with one N(4)Na5Mo octahedra. The corner-sharing octahedral tilt angles are 61°.