Materials Data on BaTb2ZnO5 by Materials Project
BaTb2ZnO5 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Ba2+ is bonded in a 11-coordinate geometry to eleven O2- atoms. There are a spread of Ba–O bond distances ranging from 2.74–3.34 Å. There are two inequivalent Tb3+ sites. In the first Tb3+ site, Tb3+ is bonded to seven O2- atoms to form distorted TbO7 pentagonal bipyramids that share corners with four equivalent TbO7 pentagonal bipyramids, edges with three equivalent TbO7 pentagonal bipyramids, edges with two equivalent ZnO5 trigonal bipyramids, a faceface with one TbO7 pentagonal bipyramid, and a faceface with one ZnO5 trigonal bipyramid. There are a spread of Tb–O bond distances ranging from 2.32–2.42 Å. In the second Tb3+ site, Tb3+ is bonded to seven O2- atoms to form distorted TbO7 pentagonal bipyramids that share corners with five equivalent ZnO5 trigonal bipyramids, edges with five TbO7 pentagonal bipyramids, an edgeedge with one ZnO5 trigonal bipyramid, and a faceface with one TbO7 pentagonal bipyramid. There are a spread of Tb–O bond distances ranging from 2.33–2.39 Å. Zn2+ is bonded to five O2- atoms to form distorted ZnO5 trigonal bipyramids that share corners with five equivalent TbO7 pentagonal bipyramids, edges with three TbO7 pentagonal bipyramids, and a faceface with one TbO7 pentagonal bipyramid. There are a spread of Zn–O bond distances ranging from 2.00–2.16 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded to three equivalent Ba2+, two Tb3+, and one Zn2+ atom to form a mixture of distorted edge and corner-sharing OBa3Tb2Zn octahedra. The corner-sharing octahedral tilt angles are 1°. In the second O2- site, O2- is bonded in a 6-coordinate geometry to two equivalent Ba2+, three Tb3+, and one Zn2+ atom. In the third O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Ba2+, three Tb3+, and one Zn2+ atom.