Materials Data on TaP2O7 by Materials Project
TaP2O7 crystallizes in the cubic Pa-3 space group. The structure is three-dimensional. Ta4+ is bonded to six equivalent O2- atoms to form TaO6 octahedra that share corners with six equivalent PO4 tetrahedra. All Ta–O bond lengths are 2.03 Å. P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with three equivalent TaO6 octahedra and a cornercorner with one PO4 tetrahedra. The corner-sharing octahedral tilt angles are 14°. There is three shorter (1.52 Å) and one longer (1.60 Å) P–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a linear geometry to one Ta4+ and one P5+ atom. In the second O2- site, O2- is bonded in a linear geometry to two equivalent P5+ atoms.
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