Materials Data on NaBi5O8 by Materials Project
NaBi5O8 crystallizes in the monoclinic Pc space group. The structure is two-dimensional and consists of one NaBi5O8 sheet oriented in the (1, 0, 0) direction. there are two inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded in a 4-coordinate geometry to three O2- atoms. There are a spread of Na–O bond distances ranging from 2.26–2.45 Å. In the second Na1+ site, Na1+ is bonded in a distorted pentagonal planar geometry to five O2- atoms. There are a spread of Na–O bond distances ranging from 2.47–2.70 Å. There are ten inequivalent Bi3+ sites. In the first Bi3+ site, Bi3+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Bi–O bond distances ranging from 2.14–2.66 Å. In the second Bi3+ site, Bi3+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Bi–O bond distances ranging from 2.18–2.48 Å. In the third Bi3+ site, Bi3+ is bonded to five O2- atoms to form distorted edge-sharing BiO5 square pyramids. There are a spread of Bi–O bond distances ranging from 2.11–2.59 Å. In the fourth Bi3+ site, Bi3+ is bonded to five O2- atoms to form distorted edge-sharing BiO5 square pyramids. There are a spread of Bi–O bond distances ranging from 2.19–2.50 Å. In the fifth Bi3+ site, Bi3+ is bonded in a 3-coordinate geometry to four O2- atoms. There are a spread of Bi–O bond distances ranging from 2.13–2.97 Å. In the sixth Bi3+ site, Bi3+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Bi–O bond distances ranging from 2.20–2.72 Å. In the seventh Bi3+ site, Bi3+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Bi–O bond distances ranging from 2.15–2.93 Å. In the eighth Bi3+ site, Bi3+ is bonded in a 4-coordinate geometry to five O2- atoms. There are a spread of Bi–O bond distances ranging from 2.16–2.95 Å. In the ninth Bi3+ site, Bi3+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Bi–O bond distances ranging from 2.18–2.70 Å. In the tenth Bi3+ site, Bi3+ is bonded to five O2- atoms to form distorted edge-sharing BiO5 square pyramids. There are a spread of Bi–O bond distances ranging from 2.17–2.57 Å. There are sixteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a trigonal non-coplanar geometry to one Na1+ and two Bi3+ atoms. In the second O2- site, O2- is bonded to four Bi3+ atoms to form distorted corner-sharing OBi4 tetrahedra. In the third O2- site, O2- is bonded in a 4-coordinate geometry to four Bi3+ atoms. In the fourth O2- site, O2- is bonded in a trigonal non-coplanar geometry to one Na1+ and two Bi3+ atoms. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+ and two Bi3+ atoms. In the sixth O2- site, O2- is bonded in a 5-coordinate geometry to five Bi3+ atoms. In the seventh O2- site, O2- is bonded in a 4-coordinate geometry to four Bi3+ atoms. In the eighth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Na1+ and two Bi3+ atoms. In the ninth O2- site, O2- is bonded to one Na1+ and three Bi3+ atoms to form a mixture of distorted corner and edge-sharing ONaBi3 tetrahedra. In the tenth O2- site, O2- is bonded to four Bi3+ atoms to form distorted edge-sharing OBi4 trigonal pyramids. In the eleventh O2- site, O2- is bonded in a 4-coordinate geometry to one Na1+ and two Bi3+ atoms. In the twelfth O2- site, O2- is bonded in a 3-coordinate geometry to three Bi3+ atoms. In the thirteenth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to three Bi3+ atoms. In the fourteenth O2- site, O2- is bonded in a 3-coordinate geometry to three Bi3+ atoms. In the fifteenth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Na1+ and three Bi3+ atoms. In the sixteenth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+ and two Bi3+ atoms.