Materials Data on Mg7Cu17O24 by Materials Project
Mg7Cu17O24 crystallizes in the orthorhombic Pmm2 space group. The structure is three-dimensional. there are five inequivalent Mg2+ sites. In the first Mg2+ site, Mg2+ is bonded to six O2- atoms to form a mixture of corner and edge-sharing MgO6 octahedra. The corner-sharing octahedra tilt angles range from 18–20°. There are a spread of Mg–O bond distances ranging from 2.05–2.20 Å. In the second Mg2+ site, Mg2+ is bonded to six O2- atoms to form a mixture of corner and edge-sharing MgO6 octahedra. The corner-sharing octahedral tilt angles are 20°. There are a spread of Mg–O bond distances ranging from 2.05–2.20 Å. In the third Mg2+ site, Mg2+ is bonded to six O2- atoms to form a mixture of corner and edge-sharing MgO6 octahedra. The corner-sharing octahedral tilt angles are 20°. There are a spread of Mg–O bond distances ranging from 2.05–2.20 Å. In the fourth Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with two equivalent CuO6 octahedra and edges with two equivalent MgO6 octahedra. The corner-sharing octahedral tilt angles are 22°. There are a spread of Mg–O bond distances ranging from 2.10–2.17 Å. In the fifth Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with two equivalent MgO6 octahedra and edges with two equivalent CuO6 octahedra. The corner-sharing octahedral tilt angles are 20°. There are a spread of Mg–O bond distances ranging from 2.05–2.19 Å. There are seven inequivalent Cu2+ sites. In the first Cu2+ site, Cu2+ is bonded in a 4-coordinate geometry to five O2- atoms. There are a spread of Cu–O bond distances ranging from 1.92–2.63 Å. In the second Cu2+ site, Cu2+ is bonded in a 4-coordinate geometry to five O2- atoms. There are a spread of Cu–O bond distances ranging from 1.92–2.61 Å. In the third Cu2+ site, Cu2+ is bonded in a 4-coordinate geometry to five O2- atoms. There are a spread of Cu–O bond distances ranging from 1.93–2.61 Å. In the fourth Cu2+ site, Cu2+ is bonded in a 4-coordinate geometry to five O2- atoms. There are a spread of Cu–O bond distances ranging from 1.93–2.60 Å. In the fifth Cu2+ site, Cu2+ is bonded in a distorted rectangular see-saw-like geometry to five O2- atoms. There are a spread of Cu–O bond distances ranging from 1.91–2.65 Å. In the sixth Cu2+ site, Cu2+ is bonded in a 4-coordinate geometry to five O2- atoms. There are a spread of Cu–O bond distances ranging from 1.92–2.58 Å. In the seventh Cu2+ site, Cu2+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with two equivalent MgO6 octahedra and edges with two equivalent MgO6 octahedra. The corner-sharing octahedral tilt angles are 22°. There are a spread of Cu–O bond distances ranging from 2.02–2.28 Å. There are twelve inequivalent O2- sites. In the first O2- site, O2- is bonded to two Mg2+ and three Cu2+ atoms to form a mixture of distorted corner and edge-sharing OMg2Cu3 square pyramids. In the second O2- site, O2- is bonded to two Mg2+ and three Cu2+ atoms to form a mixture of distorted corner and edge-sharing OMg2Cu3 square pyramids. In the third O2- site, O2- is bonded in a 6-coordinate geometry to two Mg2+ and four Cu2+ atoms. In the fourth O2- site, O2- is bonded in a 6-coordinate geometry to one Mg2+ and five Cu2+ atoms. In the fifth O2- site, O2- is bonded in a 6-coordinate geometry to two equivalent Mg2+ and four Cu2+ atoms. In the sixth O2- site, O2- is bonded in a 6-coordinate geometry to two equivalent Mg2+ and four Cu2+ atoms. In the seventh O2- site, O2- is bonded to two Mg2+ and three Cu2+ atoms to form a mixture of distorted corner and edge-sharing OMg2Cu3 square pyramids. In the eighth O2- site, O2- is bonded to two Mg2+ and three Cu2+ atoms to form a mixture of distorted corner and edge-sharing OMg2Cu3 square pyramids. In the ninth O2- site, O2- is bonded in a 6-coordinate geometry to two equivalent Mg2+ and four Cu2+ atoms. In the tenth O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Mg2+ and four Cu2+ atoms. In the eleventh O2- site, O2- is bonded in a 5-coordinate geometry to one Mg2+ and four Cu2+ atoms. In the twelfth O2- site, O2- is bonded to one Mg2+ and four Cu2+ atoms to form a mixture of distorted corner and edge-sharing OMgCu4 square pyramids.