Materials Data on Eu2CoTe2(SO7)2 by Materials Project

Abstract

Eu2CoTe2(SO7)2 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. Eu3+ is bonded to eight O2- atoms to form distorted EuO8 hexagonal bipyramids that share corners with two equivalent SO4 tetrahedra, edges with two equivalent EuO8 hexagonal bipyramids, an edgeedge with one CoO6 octahedra, and an edgeedge with one SO4 tetrahedra. There are a spread of Eu–O bond distances ranging from 2.42–2.70 Å. Co2+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with two equivalent SO4 tetrahedra and edges with two equivalent EuO8 hexagonal bipyramids. There are a spread of Co–O bond distances ranging from 1.94–2.14 Å. Te4+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Te–O bond distances ranging from 1.89–1.95 Å. S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share corners with two equivalent EuO8 hexagonal bipyramids, a cornercorner with one CoO6 octahedra, and an edgeedge with one EuO8 hexagonal bipyramid. The corner-sharing octahedral tilt angles are 43°. There are a spread of S–O bond distances ranging from 1.48–1.50 Å. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted water-like geometry to one Eu3+ and one S6+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to one Co2+ and one S6+ atom. In the third O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Eu3+ and one S6+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent Eu3+ and one S6+ atom. In the fifth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two equivalent Eu3+ and one Te4+ atom. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to one Eu3+, one Co2+, and one Te4+ atom. In the seventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Eu3+, one Co2+, and one Te4+ atom.