Materials Data on La10(Si2O9)3 by Materials Project
La10Si6O27 crystallizes in the monoclinic Pc space group. The structure is three-dimensional. there are ten inequivalent La3+ sites. In the first La3+ site, La3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of La–O bond distances ranging from 2.19–2.85 Å. In the second La3+ site, La3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of La–O bond distances ranging from 2.26–3.03 Å. In the third La3+ site, La3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.46–2.93 Å. In the fourth La3+ site, La3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.47–3.01 Å. In the fifth La3+ site, La3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of La–O bond distances ranging from 2.26–2.82 Å. In the sixth La3+ site, La3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of La–O bond distances ranging from 2.26–2.76 Å. In the seventh La3+ site, La3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of La–O bond distances ranging from 2.36–2.56 Å. In the eighth La3+ site, La3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.33–2.85 Å. In the ninth La3+ site, La3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of La–O bond distances ranging from 2.24–2.93 Å. In the tenth La3+ site, La3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of La–O bond distances ranging from 2.24–2.99 Å. There are six inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Si–O bond distances ranging from 1.64–1.66 Å. In the second Si4+ site, Si4+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Si–O bond distances ranging from 1.64–1.66 Å. In the third Si4+ site, Si4+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Si–O bond distances ranging from 1.64–1.66 Å. In the fourth Si4+ site, Si4+ is bonded in a tetrahedral geometry to four O2- atoms. There is three shorter (1.64 Å) and one longer (1.66 Å) Si–O bond length. In the fifth Si4+ site, Si4+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Si–O bond distances ranging from 1.64–1.67 Å. In the sixth Si4+ site, Si4+ is bonded in a tetrahedral geometry to four O2- atoms. There is three shorter (1.65 Å) and one longer (1.66 Å) Si–O bond length. There are twenty-seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to three La3+ and one Si4+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to three La3+ and one Si4+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to three La3+ and one Si4+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to three La3+ and one Si4+ atom. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to three La3+ and one Si4+ atom. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to three La3+ and one Si4+ atom. In the seventh O2- site, O2- is bonded in a distorted trigonal planar geometry to three La3+ atoms. In the eighth O2- site, O2- is bonded in a trigonal planar geometry to three La3+ atoms. In the ninth O2- site, O2- is bonded in a distorted single-bond geometry to three La3+ and one Si4+ atom. In the tenth O2- site, O2- is bonded in a 1-coordinate geometry to three La3+ and one Si4+ atom. In the eleventh O2- site, O2- is bonded in a 1-coordinate geometry to two La3+ and one Si4+ atom. In the twelfth O2- site, O2- is bonded in a 1-coordinate geometry to three La3+ and one Si4+ atom. In the thirteenth O2- site, O2- is bonded in a distorted single-bond geometry to three La3+ and one Si4+ atom. In the fourteenth O2- site, O2- is bonded in a 1-coordinate geometry to two La3+ and one Si4+ atom. In the fifteenth O2- site, O2- is bonded in a distorted single-bond geometry to three La3+ and one Si4+ atom. In the sixteenth O2- site, O2- is bonded in a 1-coordinate geometry to three La3+ and one Si4+ atom. In the seventeenth O2- site, O2- is bonded in a 1-coordinate geometry to three La3+ and one Si4+ atom. In the eighteenth O2- site, O2- is bonded in a distorted single-bond geometry to three La3+ and one Si4+ atom. In the nineteenth O2- site, O2- is bonded in a 1-coordinate geometry to three La3+ and one Si4+ atom. In the twentieth O2- site, O2- is bonded in a 1-coordinate geometry to three La3+ and one Si4+ atom. In the twenty-first O2- site, O2- is bonded in a 1-coordinate geometry to three La3+ and one Si4+ atom. In the twenty-second O2- site, O2- is bonded in a 1-coordinate geometry to two La3+ and one Si4+ atom. In the twenty-third O2- site, O2- is bonded in a 1-coordinate geometry to three La3+ and one Si4+ atom. In the twenty-fourth O2- site, O2- is bonded in a 1-coordinate geometry to three La3+ and one Si4+ atom. In the twenty-fifth O2- site, O2- is bonded in a 1-coordinate geometry to two La3+ and one Si4+ atom. In the twenty-sixth O2- site, O2- is bonded in a 3-coordinate geometry to two La3+ and one Si4+ atom. In the twenty-seventh O2- site, O2- is bonded in a trigonal planar geometry to three La3+ atoms.