Materials Data on Rb3MgNb5O15 by Materials Project
Rb3MgNb5O15 crystallizes in the orthorhombic P2_12_12_1 space group. The structure is three-dimensional. there are three inequivalent Rb1+ sites. In the first Rb1+ site, Rb1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Rb–O bond distances ranging from 2.86–3.34 Å. In the second Rb1+ site, Rb1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Rb–O bond distances ranging from 2.93–3.31 Å. In the third Rb1+ site, Rb1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Rb–O bond distances ranging from 2.97–3.32 Å. Mg2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mg–O bond distances ranging from 1.96–2.46 Å. There are five inequivalent Nb5+ sites. In the first Nb5+ site, Nb5+ is bonded in a 5-coordinate geometry to six O2- atoms. There are a spread of Nb–O bond distances ranging from 1.83–2.60 Å. In the second Nb5+ site, Nb5+ is bonded to six O2- atoms to form a mixture of distorted corner and edge-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles are 29°. There are a spread of Nb–O bond distances ranging from 1.80–2.39 Å. In the third Nb5+ site, Nb5+ is bonded to six O2- atoms to form a mixture of distorted corner and edge-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 5–29°. There are a spread of Nb–O bond distances ranging from 1.81–2.39 Å. In the fourth Nb5+ site, Nb5+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Nb–O bond distances ranging from 1.86–2.33 Å. In the fifth Nb5+ site, Nb5+ is bonded to six O2- atoms to form a mixture of distorted corner and edge-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles are 5°. There are a spread of Nb–O bond distances ranging from 1.86–2.32 Å. There are fifteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to four Rb1+ and one Nb5+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to four Rb1+ and one Nb5+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to four Rb1+ and one Nb5+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Rb1+, one Mg2+, and one Nb5+ atom. In the fifth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Rb1+ and two Nb5+ atoms. In the sixth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Rb1+ and two Nb5+ atoms. In the seventh O2- site, O2- is bonded in a 2-coordinate geometry to one Mg2+ and three Nb5+ atoms. In the eighth O2- site, O2- is bonded in a 4-coordinate geometry to one Mg2+ and three Nb5+ atoms. In the ninth O2- site, O2- is bonded in a 4-coordinate geometry to one Mg2+ and three Nb5+ atoms. In the tenth O2- site, O2- is bonded in a 3-coordinate geometry to one Mg2+ and two Nb5+ atoms. In the eleventh O2- site, O2- is bonded in a distorted trigonal planar geometry to three Nb5+ atoms. In the twelfth O2- site, O2- is bonded in a distorted trigonal planar geometry to three Nb5+ atoms. In the thirteenth O2- site, O2- is bonded in a linear geometry to two Rb1+, one Mg2+, and one Nb5+ atom. In the fourteenth O2- site, O2- is bonded in a distorted linear geometry to two Rb1+ and two Nb5+ atoms. In the fifteenth O2- site, O2- is bonded in a distorted linear geometry to two Rb1+ and two Nb5+ atoms.