NaTaWO7 crystallizes in the orthorhombic Imma space group. Na(1) is bonded to two equivalent O(1), two equivalent O(4), and four equivalent O(2) atoms to form NaO8 hexagonal bipyramids that share edges with two equivalent Na(1)O8 hexagonal bipyramids, edges with two equivalent W(1)O6 octahedra, and edges with four equivalent Ta(1)O6 octahedra. Ta(1) is bonded to two equivalent O(4) and four equivalent O(2) atoms to form TaO6 octahedra that share corners with two equivalent Ta(1)O6 octahedra, corners with four equivalent W(1)O6 octahedra, and edges with four equivalent Na(1)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 38-41°. W(1) is bonded to two equivalent O(3) and four equivalent O(2) atoms to form WO6 octahedra that share corners with two equivalent W(1)O6 octahedra, corners with four equivalent Ta(1)O6 octahedra, and edges with two equivalent Na(1)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 35-38°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to two equivalent Na(1) atoms. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Na(1), one Ta(1), and one W(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to two equivalent W(1) atoms. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to two equivalent Na(1) and two equivalent Ta(1) atoms.
NaTaWO7 crystallizes in the orthorhombic Imma space group. Na(1) is bonded to two equivalent O(1), two equivalent O(4), and four equivalent O(2) atoms to form NaO8 hexagonal bipyramids that share edges with two equivalent Na(1)O8 hexagonal bipyramids, edges with two equivalent W(1)O6 octahedra, and edges with four equivalent Ta(1)O6 octahedra. Both Na(1)-O(1) bond lengths are 2.40 Å. Both Na(1)-O(4) bond lengths are 2.70 Å. All Na(1)-O(2) bond lengths are 2.69 Å. Ta(1) is bonded to two equivalent O(4) and four equivalent O(2) atoms to form TaO6 octahedra that share corners with two equivalent Ta(1)O6 octahedra, corners with four equivalent W(1)O6 octahedra, and edges with four equivalent Na(1)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 38-41°. Both Ta(1)-O(4) bond lengths are 1.97 Å. All Ta(1)-O(2) bond lengths are 2.00 Å. W(1) is bonded to two equivalent O(3) and four equivalent O(2) atoms to form WO6 octahedra that share corners with two equivalent W(1)O6 octahedra, corners with four equivalent Ta(1)O6 octahedra, and edges with two equivalent Na(1)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 35-38°. Both W(1)-O(3) bond lengths are 1.94 Å. All W(1)-O(2) bond lengths are 1.94 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to two equivalent Na(1) atoms. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Na(1), one Ta(1), and one W(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to two equivalent W(1) atoms. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to two equivalent Na(1) and two equivalent Ta(1) atoms.