Materials Data on Na17Al5O16 by Materials Project
Na17Al5O16 crystallizes in the monoclinic Cm space group. The structure is three-dimensional. there are nine inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Na–O bond distances ranging from 2.32–2.61 Å. In the second Na1+ site, Na1+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Na–O bond distances ranging from 2.35–2.69 Å. In the third Na1+ site, Na1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Na–O bond distances ranging from 2.29–2.68 Å. In the fourth Na1+ site, Na1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Na–O bond distances ranging from 2.29–2.69 Å. In the fifth Na1+ site, Na1+ is bonded in a 3-coordinate geometry to four O2- atoms. There are a spread of Na–O bond distances ranging from 2.27–2.93 Å. In the sixth Na1+ site, Na1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Na–O bond distances ranging from 2.29–2.76 Å. In the seventh Na1+ site, Na1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Na–O bond distances ranging from 2.30–2.71 Å. In the eighth Na1+ site, Na1+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Na–O bond distances ranging from 2.24–2.44 Å. In the ninth Na1+ site, Na1+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Na–O bond distances ranging from 2.45–2.50 Å. There are three inequivalent Al3+ sites. In the first Al3+ site, Al3+ is bonded to four O2- atoms to form corner-sharing AlO4 tetrahedra. There is three shorter (1.78 Å) and one longer (1.82 Å) Al–O bond length. In the second Al3+ site, Al3+ is bonded to four O2- atoms to form corner-sharing AlO4 tetrahedra. There are a spread of Al–O bond distances ranging from 1.76–1.80 Å. In the third Al3+ site, Al3+ is bonded to four O2- atoms to form corner-sharing AlO4 tetrahedra. There is two shorter (1.76 Å) and two longer (1.80 Å) Al–O bond length. There are nine inequivalent O2- sites. In the first O2- site, O2- is bonded in a 6-coordinate geometry to five Na1+ and one Al3+ atom. In the second O2- site, O2- is bonded in a 6-coordinate geometry to five Na1+ and one Al3+ atom. In the third O2- site, O2- is bonded in a 5-coordinate geometry to four Na1+ and two Al3+ atoms. In the fourth O2- site, O2- is bonded to four Na1+ and two Al3+ atoms to form distorted edge-sharing ONa4Al2 octahedra. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to five Na1+ and one Al3+ atom. In the sixth O2- site, O2- is bonded in a 6-coordinate geometry to five Na1+ and one Al3+ atom. In the seventh O2- site, O2- is bonded in a 6-coordinate geometry to five Na1+ and one Al3+ atom. In the eighth O2- site, O2- is bonded in a 1-coordinate geometry to five Na1+ and one Al3+ atom. In the ninth O2- site, O2- is bonded in a 1-coordinate geometry to five Na1+ and one Al3+ atom.