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TaO3 crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Ta is bonded to twelve equivalent O atoms to form a mixture of face and corner-sharing TaO12 cuboctahedra. There are six shorter (2.24 Å) and six longer (2.34 Å) Ta–O bond lengths. O is bonded in a see-saw-like geometry to four equivalent Ta atoms.
(TaO3)2(O2)7 crystallizes in the triclinic P1 space group. The structure is two-dimensional and consists of two oxygen molecules; one trioxidane molecule; and one TaO3 sheet oriented in the (0, 0, 1) direction. In the TaO3 sheet, Ta is bonded to five O atoms to form distorted corner-sharing TaO5 trigonal bipyramids. There are a spread of Ta–O bond distances ranging from 1.79–2.00 Å. There are three inequivalent O sites. In the first O site, O is bonded in a bent 150 degrees geometry to two equivalent Ta atoms. In the second O site, O is bonded in a single-bond geometry to one Ta atom. In the third O site, O is bonded in a bent 150 degrees geometry to two equivalent Ta atoms.
Sn2Ta2O7 crystallizes in the cubic Fd-3m space group. The structure is three-dimensional and consists of one Sn2O framework and one TaO3 framework. In the Sn2O framework, Sn2+ is bonded in a distorted linear geometry to two equivalent O2- atoms. Both Sn–O bond lengths are 2.32 Å. O2- is bonded to four equivalent Sn2+ atoms to form corner-sharing OSn4 tetrahedra. In the TaO3 framework, Ta5+ is bonded to six equivalent O2- atoms to form corner-sharing TaO6 octahedra. The corner-sharing octahedral tilt angles are 39°. All Ta–O bond lengths are 2.01 Å. O2- is bonded in a distorted bent 150 degrees geometry to two equivalent Ta5+ atoms.
SnTaO3 is (Cubic) Perovskite structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional and consists of one 7440-31-5 molecule and one TaO3 framework. In the TaO3 framework, Ta4+ is bonded to six equivalent O2- atoms to form corner-sharing TaO6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Ta–O bond lengths are 2.04 Å. O2- is bonded in a linear geometry to two equivalent Ta4+ atoms.