NaMgMn2O4 is Caswellsilverite-derived structured and crystallizes in the triclinic P-1 space group. Na(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form NaO6 octahedra that share corners with six equivalent Mn(2)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, edges with four equivalent Mg(1)O6 octahedra, and edges with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-10°. Mg(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form MgO6 octahedra that share corners with six equivalent Mn(1)O6 octahedra, edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, edges with four equivalent Na(1)O6 octahedra, and edges with four equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 8-11°. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form MnO6 octahedra that share corners with six equivalent Mg(1)O6 octahedra, edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, edges with four equivalent Na(1)O6 octahedra, and edges with four equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 8-11°. In the second Mn site, Mn(2) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form MnO6 octahedra that share corners with six equivalent Na(1)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, edges with four equivalent Mg(1)O6 octahedra, and edges with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-10°. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), two equivalent Mg(1), one Mn(2), and two equivalent Mn(1) atoms to form ONaMg2Mn3 octahedra that share corners with six equivalent O(1)NaMg2Mn3 octahedra, edges with four equivalent O(1)NaMg2Mn3 octahedra, and edges with eight equivalent O(2)Na2MgMn3 octahedra. The corner-sharing octahedra are not tilted. In the second O site, O(2) is bonded to two equivalent Na(1), one Mg(1), one Mn(1), and two equivalent Mn(2) atoms to form ONa2MgMn3 octahedra that share corners with six equivalent O(2)Na2MgMn3 octahedra, edges with four equivalent O(2)Na2MgMn3 octahedra, and edges with eight equivalent O(1)NaMg2Mn3 octahedra. The corner-sharing octahedra are not tilted.
NaMgMn2O4 is Caswellsilverite-derived structured and crystallizes in the triclinic P-1 space group. Na(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form NaO6 octahedra that share corners with six equivalent Mn(2)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, edges with four equivalent Mg(1)O6 octahedra, and edges with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-10°. Both Na(1)-O(1) bond lengths are 2.32 Å. There are two shorter (2.33 Å) and two longer (2.37 Å) Na(1)-O(2) bond lengths. Mg(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form MgO6 octahedra that share corners with six equivalent Mn(1)O6 octahedra, edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, edges with four equivalent Na(1)O6 octahedra, and edges with four equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 8-11°. Both Mg(1)-O(2) bond lengths are 2.12 Å. There are two shorter (2.13 Å) and two longer (2.27 Å) Mg(1)-O(1) bond lengths. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form MnO6 octahedra that share corners with six equivalent Mg(1)O6 octahedra, edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, edges with four equivalent Na(1)O6 octahedra, and edges with four equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 8-11°. Both Mn(1)-O(2) bond lengths are 2.21 Å. There are two shorter (2.22 Å) and two longer (2.36 Å) Mn(1)-O(1) bond lengths. In the second Mn site, Mn(2) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form MnO6 octahedra that share corners with six equivalent Na(1)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, edges with four equivalent Mg(1)O6 octahedra, and edges with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-10°. Both Mn(2)-O(1) bond lengths are 2.00 Å. There are two shorter (1.97 Å) and two longer (2.31 Å) Mn(2)-O(2) bond lengths. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), two equivalent Mg(1), one Mn(2), and two equivalent Mn(1) atoms to form ONaMg2Mn3 octahedra that share corners with six equivalent O(1)NaMg2Mn3 octahedra, edges with four equivalent O(1)NaMg2Mn3 octahedra, and edges with eight equivalent O(2)Na2MgMn3 octahedra. The corner-sharing octahedra are not tilted. In the second O site, O(2) is bonded to two equivalent Na(1), one Mg(1), one Mn(1), and two equivalent Mn(2) atoms to form ONa2MgMn3 octahedra that share corners with six equivalent O(2)Na2MgMn3 octahedra, edges with four equivalent O(2)Na2MgMn3 octahedra, and edges with eight equivalent O(1)NaMg2Mn3 octahedra. The corner-sharing octahedra are not tilted.