Materials Data on Na14Mg9(P2O7)8 by Materials Project
Na14Mg9(P2O7)8 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are seven inequivalent Na sites. In the first Na site, Na is bonded in a 6-coordinate geometry to eight O atoms. There are a spread of Na–O bond distances ranging from 2.39–2.99 Å. In the second Na site, Na is bonded in a 2-coordinate geometry to eight O atoms. There are a spread of Na–O bond distances ranging from 2.30–2.93 Å. In the third Na site, Na is bonded in a distorted see-saw-like geometry to four O atoms. There are a spread of Na–O bond distances ranging from 2.29–2.48 Å. In the fourth Na site, Na is bonded in a 4-coordinate geometry to five O atoms. There are a spread of Na–O bond distances ranging from 2.30–2.94 Å. In the fifth Na site, Na is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Na–O bond distances ranging from 2.30–2.78 Å. In the sixth Na site, Na is bonded to six O atoms to form distorted NaO6 octahedra that share corners with six PO4 tetrahedra and edges with two MgO6 octahedra. There are a spread of Na–O bond distances ranging from 2.30–2.69 Å. In the seventh Na site, Na is bonded in a 5-coordinate geometry to five O atoms. There are a spread of Na–O bond distances ranging from 2.27–2.49 Å. There are five inequivalent Mg sites. In the first Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share a cornercorner with one MgO6 octahedra, corners with four PO4 tetrahedra, and an edgeedge with one PO4 tetrahedra. The corner-sharing octahedral tilt angles are 61°. There are a spread of Mg–O bond distances ranging from 2.00–2.27 Å. In the second Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share a cornercorner with one MgO6 octahedra, corners with four PO4 tetrahedra, an edgeedge with one NaO6 octahedra, and an edgeedge with one PO4 tetrahedra. The corner-sharing octahedral tilt angles are 63°. There are a spread of Mg–O bond distances ranging from 1.99–2.26 Å. In the third Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share a cornercorner with one MgO6 octahedra and corners with six PO4 tetrahedra. The corner-sharing octahedral tilt angles are 61°. There are a spread of Mg–O bond distances ranging from 2.03–2.27 Å. In the fourth Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share a cornercorner with one MgO6 octahedra, corners with six PO4 tetrahedra, and an edgeedge with one NaO6 octahedra. The corner-sharing octahedral tilt angles are 63°. There are a spread of Mg–O bond distances ranging from 2.05–2.20 Å. In the fifth Mg site, Mg is bonded in a 4-coordinate geometry to six O atoms. There are a spread of Mg–O bond distances ranging from 2.06–2.69 Å. There are eight inequivalent P sites. In the first P site, P is bonded to four O atoms to form PO4 tetrahedra that share a cornercorner with one NaO6 octahedra, corners with two MgO6 octahedra, a cornercorner with one PO4 tetrahedra, and an edgeedge with one MgO6 octahedra. The corner-sharing octahedra tilt angles range from 48–54°. There are a spread of P–O bond distances ranging from 1.52–1.61 Å. In the second P site, P is bonded to four O atoms to form PO4 tetrahedra that share a cornercorner with one NaO6 octahedra, corners with two MgO6 octahedra, a cornercorner with one PO4 tetrahedra, and an edgeedge with one MgO6 octahedra. The corner-sharing octahedra tilt angles range from 49–63°. There are a spread of P–O bond distances ranging from 1.52–1.61 Å. In the third P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with three MgO6 octahedra and a cornercorner with one PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 37–50°. There are a spread of P–O bond distances ranging from 1.52–1.63 Å. In the fourth P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with two equivalent NaO6 octahedra, corners with three MgO6 octahedra, and a cornercorner with one PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 39–65°. There are a spread of P–O bond distances ranging from 1.52–1.63 Å. In the fifth P site, P is bonded to four O atoms to form PO4 tetrahedra that share a cornercorner with one NaO6 octahedra, corners with two MgO6 octahedra, and a cornercorner with one PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 44–55°. There are a spread of P–O bond distances ranging from 1.52–1.69 Å. In the sixth P site, P is bonded to four O atoms to form PO4 tetrahedra that share a cornercorner with one NaO6 octahedra, corners with two MgO6 octahedra, and a cornercorner with one PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 42–68°. There are a spread of P–O bond distances ranging from 1.52–1.66 Å. In the seventh P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with three MgO6 octahedra and a cornercorner with one PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 36–49°. There are a spread of P–O bond distances ranging from 1.52–1.63 Å. In the eighth P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with three MgO6 octahedra and a cornercorner with one PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 41–44°. There are a spread of P–O bond distances ranging from 1.52–1.65 Å. There are twenty-eight inequivalent O sites. In the first O site, O is bonded in a distorted bent 150 degrees geometry to one Na, one Mg, and one P atom. In the second O site, O is bonded in a 2-coordinate geometry to one Na, one Mg, and one P atom. In the third O site, O is bonded to three Na and one P atom to form a mixture of distorted edge and corner-sharing ONa3P tetrahedra. In the fourth O site, O is bonded in a 4-coordinate geometry to three Na and one P atom. In the fifth O site, O is bonded in a 3-coordinate geometry to one Na, one Mg, and one P atom. In the sixth O site, O is bonded in a 3-coordinate geometry to two equivalent Na, one Mg, and one P atom. In the seventh O site, O is bonded in a distorted trigonal planar geometry to one Na, one Mg, and one P atom. In the eighth O site, O is bonded in a distorted trigonal planar geometry to one Na, one Mg, and one P atom. In the ninth O site, O is bonded in a 3-coordinate geometry to one Na and two P atoms. In the tenth O site, O is bonded in a 2-coordinate geometry to one Na and two P atoms. In the eleventh O site, O is bonded in a distorted rectangular see-saw-like geometry to two Na, one Mg, and one P atom. In the twelfth O site, O is bonded in a 4-coordinate geometry to two Na, one Mg, and one P atom. In the thirteenth O site, O is bonded in a distorted bent 120 degrees geometry to two P atoms. In the fourteenth O site, O is bonded in a bent 120 degrees geometry to two P atoms. In the fifteenth O site, O is bonded in a distorted trigonal pyramidal geometry to two Na, one Mg, and one P atom. In the sixteenth O site, O is bonded in a 2-coordinate geometry to one Na, two Mg, and one P atom. In the seventeenth O site, O is bonded to three Na, one Mg, and one P atom to form distorted ONa3MgP trigonal bipyramids that share a cornercorner with one ONa3P tetrahedra and an edgeedge with one ONa3MgP trigonal bipyramid. In the eighteenth O site, O is bonded to three Na, one Mg, and one P atom to form distorted ONa3MgP trigonal bipyramids that share a cornercorner with one ONa3P tetrahedra, an edgeedge with one ONa3P tetrahedra, and an edgeedge with one ONa3MgP trigonal bipyramid. In the nineteenth O site, O is bonded in a 2-coordinate geometry to two equivalent Na, one Mg, and one P atom. In the twentieth O site, O is bonded in a 2-coordinate geometry to two equivalent Na, one Mg, and one P atom. In the twenty-first O site, O is bonded in a 4-coordinate geometry to one Na, two Mg, and one P atom. In the twenty-second O site, O is bonded in a 4-coordinate geometry to two Na, one Mg, and one P atom. In the twenty-third O site, O is bonded in a 4-coordinate geometry to one Na, two Mg, and one P atom. In the twenty-fourth O site, O is bonded in a 4-coordinate geometry to one Na, two Mg, and one P atom. In the twenty-fifth O site, O is bonded in a 3-coordinate geometry to two Mg and one P atom. In the twenty-sixth O site, O is bonded in a 4-coordinate geometry to two Na, one Mg, and one P atom. In the twenty-seventh O site, O is bonded in a 3-coordinate geometry to two Na, one Mg, and one P atom. In the twenty-eighth O site, O is bonded in a 3-coordinate geometry to one Na, one Mg, and one P atom.