Materials Data on Ca4Al6MoO16 by Materials Project
Ca4MoAl6O16 crystallizes in the tetragonal I-4 space group. The structure is three-dimensional. Ca2+ is bonded in a 4-coordinate geometry to five O2- atoms. There are a spread of Ca–O bond distances ranging from 2.31–2.65 Å. Mo6+ is bonded in a tetrahedral geometry to four equivalent O2- atoms. All Mo–O bond lengths are 1.79 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 two shorter (1.76 Å) and two longer (1.77 Å) Al–O bond length. In the second Al3+ site, Al3+ is bonded to four equivalent O2- atoms to form corner-sharing AlO4 tetrahedra. All Al–O bond lengths are 1.75 Å. In the third Al3+ site, Al3+ is bonded to four equivalent O2- atoms to form corner-sharing AlO4 tetrahedra. All Al–O bond lengths are 1.78 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ca2+ and one Mo6+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Ca2+ and two Al3+ atoms. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to one Ca2+ and two Al3+ atoms. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one Ca2+ and two equivalent Al3+ atoms.