NaMnO2 is H-Phase structured and crystallizes in the triclinic P1 space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded to three equivalent O(1) and three equivalent O(7) atoms to form distorted NaO6 pentagonal pyramids that share corners with three equivalent Mn(3)O6 octahedra, corners with three equivalent Mn(4)O6 octahedra, edges with three equivalent Mn(3)O6 octahedra, edges with three equivalent Mn(4)O6 octahedra, and edges with six equivalent Na(1)O6 pentagonal pyramids. The corner-sharing octahedral tilt angles range from 10-14°. In the second Na site, Na(2) is bonded to three equivalent O(2) and three equivalent O(8) atoms to form distorted NaO6 pentagonal pyramids that share corners with three equivalent Mn(1)O6 octahedra, corners with three equivalent Mn(2)O6 octahedra, edges with three equivalent Mn(1)O6 octahedra, edges with three equivalent Mn(2)O6 octahedra, and edges with six equivalent Na(2)O6 pentagonal pyramids. The corner-sharing octahedral tilt angles range from 10-14°. In the third Na site, Na(3) is bonded to three equivalent O(3) and three equivalent O(5) atoms to form distorted NaO6 pentagonal pyramids that share corners with three equivalent Mn(2)O6 octahedra, corners with three equivalent Mn(3)O6 octahedra, edges with three equivalent Mn(2)O6 octahedra, edges with three equivalent Mn(3)O6 octahedra, and edges with six equivalent Na(3)O6 pentagonal pyramids. The corner-sharing octahedral tilt angles range from 10-14°. In the fourth Na site, Na(4) is bonded to three equivalent O(4) and three equivalent O(6) atoms to form distorted NaO6 pentagonal pyramids that share corners with three equivalent Mn(1)O6 octahedra, corners with three equivalent Mn(4)O6 octahedra, edges with three equivalent Mn(1)O6 octahedra, edges with three equivalent Mn(4)O6 octahedra, and edges with six equivalent Na(4)O6 pentagonal pyramids. The corner-sharing octahedral tilt angles range from 10-14°. There are four inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to three equivalent O(2) and three equivalent O(4) atoms to form MnO6 octahedra that share corners with three equivalent Na(2)O6 pentagonal pyramids, corners with three equivalent Na(4)O6 pentagonal pyramids, edges with six equivalent Mn(1)O6 octahedra, edges with three equivalent Na(2)O6 pentagonal pyramids, and edges with three equivalent Na(4)O6 pentagonal pyramids. In the second Mn site, Mn(2) is bonded to three equivalent O(5) and three equivalent O(8) atoms to form MnO6 octahedra that share corners with three equivalent Na(2)O6 pentagonal pyramids, corners with three equivalent Na(3)O6 pentagonal pyramids, edges with six equivalent Mn(2)O6 octahedra, edges with three equivalent Na(2)O6 pentagonal pyramids, and edges with three equivalent Na(3)O6 pentagonal pyramids. In the third Mn site, Mn(3) is bonded to three equivalent O(1) and three equivalent O(3) atoms to form MnO6 octahedra that share corners with three equivalent Na(1)O6 pentagonal pyramids, corners with three equivalent Na(3)O6 pentagonal pyramids, edges with six equivalent Mn(3)O6 octahedra, edges with three equivalent Na(1)O6 pentagonal pyramids, and edges with three equivalent Na(3)O6 pentagonal pyramids. In the fourth Mn site, Mn(4) is bonded to three equivalent O(6) and three equivalent O(7) atoms to form MnO6 octahedra that share corners with three equivalent Na(1)O6 pentagonal pyramids, corners with three equivalent Na(4)O6 pentagonal pyramids, edges with six equivalent Mn(4)O6 octahedra, edges with three equivalent Na(1)O6 pentagonal pyramids, and edges with three equivalent Na(4)O6 pentagonal pyramids. There are eight inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Na(1) and three equivalent Mn(3) atoms to form a mixture of corner, edge, and face-sharing ONa3Mn3 octahedra. The corner-sharing octahedral tilt angles range from 0-50°. In the second O site, O(2) is bonded to three equivalent Na(2) and three equivalent Mn(1) atoms to form a mixture of corner, edge, and face-sharing ONa3Mn3 octahedra. The corner-sharing octahedral tilt angles range from 0-50°. In the third O site, O(3) is bonded to three equivalent Na(3) and three equivalent Mn(3) atoms to form a mixture of corner, edge, and face-sharing ONa3Mn3 octahedra. The corner-sharing octahedral tilt angles range from 0-50°. In the fourth O site, O(4) is bonded to three equivalent Na(4) and three equivalent Mn(1) atoms to form a mixture of corner, edge, and face-sharing ONa3Mn3 octahedra. The corner-sharing octahedral tilt angles range from 0-50°. In the fifth O site, O(5) is bonded to three equivalent Na(3) and three equivalent Mn(2) atoms to form a mixture of corner, edge, and face-sharing ONa3Mn3 octahedra. The corner-sharing octahedral tilt angles range from 0-50°. In the sixth O site, O(6) is bonded to three equivalent Na(4) and three equivalent Mn(4) atoms to form a mixture of corner, edge, and face-sharing ONa3Mn3 octahedra. The corner-sharing octahedral tilt angles range from 0-50°. In the seventh O site, O(7) is bonded to three equivalent Na(1) and three equivalent Mn(4) atoms to form a mixture of corner, edge, and face-sharing ONa3Mn3 octahedra. The corner-sharing octahedral tilt angles range from 0-50°. In the eighth O site, O(8) is bonded to three equivalent Na(2) and three equivalent Mn(2) atoms to form a mixture of corner, edge, and face-sharing ONa3Mn3 octahedra. The corner-sharing octahedral tilt angles range from 0-50°.
NaMnO2 is H-Phase structured and crystallizes in the triclinic P1 space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded to three equivalent O(1) and three equivalent O(7) atoms to form distorted NaO6 pentagonal pyramids that share corners with three equivalent Mn(3)O6 octahedra, corners with three equivalent Mn(4)O6 octahedra, edges with three equivalent Mn(3)O6 octahedra, edges with three equivalent Mn(4)O6 octahedra, and edges with six equivalent Na(1)O6 pentagonal pyramids. The corner-sharing octahedral tilt angles range from 10-14°. There is one shorter (2.41 Å) and two longer (2.43 Å) Na(1)-O(1) bond lengths. There are two shorter (2.39 Å) and one longer (2.48 Å) Na(1)-O(7) bond length. In the second Na site, Na(2) is bonded to three equivalent O(2) and three equivalent O(8) atoms to form distorted NaO6 pentagonal pyramids that share corners with three equivalent Mn(1)O6 octahedra, corners with three equivalent Mn(2)O6 octahedra, edges with three equivalent Mn(1)O6 octahedra, edges with three equivalent Mn(2)O6 octahedra, and edges with six equivalent Na(2)O6 pentagonal pyramids. The corner-sharing octahedral tilt angles range from 10-14°. There are a spread of Na(2)-O(2) bond distances ranging from 2.38-2.48 Å. There are a spread of Na(2)-O(8) bond distances ranging from 2.40-2.44 Å. In the third Na site, Na(3) is bonded to three equivalent O(3) and three equivalent O(5) atoms to form distorted NaO6 pentagonal pyramids that share corners with three equivalent Mn(2)O6 octahedra, corners with three equivalent Mn(3)O6 octahedra, edges with three equivalent Mn(2)O6 octahedra, edges with three equivalent Mn(3)O6 octahedra, and edges with six equivalent Na(3)O6 pentagonal pyramids. The corner-sharing octahedral tilt angles range from 10-14°. There is one shorter (2.41 Å) and two longer (2.43 Å) Na(3)-O(3) bond lengths. There are two shorter (2.39 Å) and one longer (2.48 Å) Na(3)-O(5) bond length. In the fourth Na site, Na(4) is bonded to three equivalent O(4) and three equivalent O(6) atoms to form distorted NaO6 pentagonal pyramids that share corners with three equivalent Mn(1)O6 octahedra, corners with three equivalent Mn(4)O6 octahedra, edges with three equivalent Mn(1)O6 octahedra, edges with three equivalent Mn(4)O6 octahedra, and edges with six equivalent Na(4)O6 pentagonal pyramids. The corner-sharing octahedral tilt angles range from 10-14°. There are a spread of Na(4)-O(4) bond distances ranging from 2.38-2.48 Å. There are a spread of Na(4)-O(6) bond distances ranging from 2.40-2.44 Å. There are four inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to three equivalent O(2) and three equivalent O(4) atoms to form MnO6 octahedra that share corners with three equivalent Na(2)O6 pentagonal pyramids, corners with three equivalent Na(4)O6 pentagonal pyramids, edges with six equivalent Mn(1)O6 octahedra, edges with three equivalent Na(2)O6 pentagonal pyramids, and edges with three equivalent Na(4)O6 pentagonal pyramids. There are two shorter (1.97 Å) and one longer (2.42 Å) Mn(1)-O(2) bond length. There are two shorter (1.97 Å) and one longer (2.42 Å) Mn(1)-O(4) bond length. In the second Mn site, Mn(2) is bonded to three equivalent O(5) and three equivalent O(8) atoms to form MnO6 octahedra that share corners with three equivalent Na(2)O6 pentagonal pyramids, corners with three equivalent Na(3)O6 pentagonal pyramids, edges with six equivalent Mn(2)O6 octahedra, edges with three equivalent Na(2)O6 pentagonal pyramids, and edges with three equivalent Na(3)O6 pentagonal pyramids. There are two shorter (1.97 Å) and one longer (2.42 Å) Mn(2)-O(5) bond length. There are two shorter (1.97 Å) and one longer (2.41 Å) Mn(2)-O(8) bond length. In the third Mn site, Mn(3) is bonded to three equivalent O(1) and three equivalent O(3) atoms to form MnO6 octahedra that share corners with three equivalent Na(1)O6 pentagonal pyramids, corners with three equivalent Na(3)O6 pentagonal pyramids, edges with six equivalent Mn(3)O6 octahedra, edges with three equivalent Na(1)O6 pentagonal pyramids, and edges with three equivalent Na(3)O6 pentagonal pyramids. There are two shorter (1.97 Å) and one longer (2.41 Å) Mn(3)-O(1) bond length. There are two shorter (1.97 Å) and one longer (2.41 Å) Mn(3)-O(3) bond length. In the fourth Mn site, Mn(4) is bonded to three equivalent O(6) and three equivalent O(7) atoms to form MnO6 octahedra that share corners with three equivalent Na(1)O6 pentagonal pyramids, corners with three equivalent Na(4)O6 pentagonal pyramids, edges with six equivalent Mn(4)O6 octahedra, edges with three equivalent Na(1)O6 pentagonal pyramids, and edges with three equivalent Na(4)O6 pentagonal pyramids. There are two shorter (1.97 Å) and one longer (2.41 Å) Mn(4)-O(6) bond length. There are two shorter (1.97 Å) and one longer (2.42 Å) Mn(4)-O(7) bond length. There are eight inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Na(1) and three equivalent Mn(3) atoms to form a mixture of corner, edge, and face-sharing ONa3Mn3 octahedra. The corner-sharing octahedral tilt angles range from 0-50°. In the second O site, O(2) is bonded to three equivalent Na(2) and three equivalent Mn(1) atoms to form a mixture of corner, edge, and face-sharing ONa3Mn3 octahedra. The corner-sharing octahedral tilt angles range from 0-50°. In the third O site, O(3) is bonded to three equivalent Na(3) and three equivalent Mn(3) atoms to form a mixture of corner, edge, and face-sharing ONa3Mn3 octahedra. The corner-sharing octahedral tilt angles range from 0-50°. In the fourth O site, O(4) is bonded to three equivalent Na(4) and three equivalent Mn(1) atoms to form a mixture of corner, edge, and face-sharing ONa3Mn3 octahedra. The corner-sharing octahedral tilt angles range from 0-50°. In the fifth O site, O(5) is bonded to three equivalent Na(3) and three equivalent Mn(2) atoms to form a mixture of corner, edge, and face-sharing ONa3Mn3 octahedra. The corner-sharing octahedral tilt angles range from 0-50°. In the sixth O site, O(6) is bonded to three equivalent Na(4) and three equivalent Mn(4) atoms to form a mixture of corner, edge, and face-sharing ONa3Mn3 octahedra. The corner-sharing octahedral tilt angles range from 0-50°. In the seventh O site, O(7) is bonded to three equivalent Na(1) and three equivalent Mn(4) atoms to form a mixture of corner, edge, and face-sharing ONa3Mn3 octahedra. The corner-sharing octahedral tilt angles range from 0-50°. In the eighth O site, O(8) is bonded to three equivalent Na(2) and three equivalent Mn(2) atoms to form a mixture of corner, edge, and face-sharing ONa3Mn3 octahedra. The corner-sharing octahedral tilt angles range from 0-50°.