Materials Data on MnCd2TeO6 by Materials Project

Abstract

MnCd2TeO6 is Ilmenite-derived structured and crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are two inequivalent Mn2+ sites. In the first Mn2+ site, Mn2+ is bonded to six O2- atoms to form distorted MnO6 pentagonal pyramids that share corners with two TeO6 octahedra, edges with two TeO6 octahedra, and edges with two equivalent CdO6 pentagonal pyramids. The corner-sharing octahedra tilt angles range from 31–39°. There are a spread of Mn–O bond distances ranging from 2.16–2.42 Å. In the second Mn2+ site, Mn2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mn–O bond distances ranging from 2.16–2.52 Å. There are four inequivalent Cd2+ sites. In the first Cd2+ site, Cd2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Cd–O bond distances ranging from 2.25–2.55 Å. In the second Cd2+ site, Cd2+ is bonded to six O2- atoms to form distorted CdO6 pentagonal pyramids that share corners with two TeO6 octahedra, edges with two TeO6 octahedra, and edges with two equivalent MnO6 pentagonal pyramids. The corner-sharing octahedra tilt angles range from 36–41°. There are a spread of Cd–O bond distances ranging from 2.26–2.48 Å. In the third Cd2+ site, Cd2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Cd–O bond distances ranging from 2.25–2.51 Å. In the fourth Cd2+ site, Cd2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Cd–O bond distances ranging from 2.27–2.50 Å. There are two inequivalent Te6+ sites. In the first Te6+ site, Te6+ is bonded to six O2- atoms to form TeO6 octahedra that share a cornercorner with one MnO6 pentagonal pyramid, a cornercorner with one CdO6 pentagonal pyramid, an edgeedge with one MnO6 pentagonal pyramid, and an edgeedge with one CdO6 pentagonal pyramid. There is five shorter (1.97 Å) and one longer (1.98 Å) Te–O bond length. In the second Te6+ site, Te6+ is bonded to six O2- atoms to form TeO6 octahedra that share a cornercorner with one MnO6 pentagonal pyramid, a cornercorner with one CdO6 pentagonal pyramid, an edgeedge with one MnO6 pentagonal pyramid, and an edgeedge with one CdO6 pentagonal pyramid. There is two shorter (1.96 Å) and four longer (1.97 Å) Te–O bond length. There are twelve inequivalent O2- sites. In the first O2- site, O2- is bonded to two Mn2+, one Cd2+, and one Te6+ atom to form distorted OMn2CdTe tetrahedra that share corners with five OMnCd2Te tetrahedra, corners with five OMn2CdTe trigonal pyramids, edges with three OMnCd2Te tetrahedra, and an edgeedge with one OMnCd2Te trigonal pyramid. In the second O2- site, O2- is bonded to one Mn2+, two Cd2+, and one Te6+ atom to form distorted OMnCd2Te tetrahedra that share corners with five OMnCd2Te tetrahedra, corners with seven OMn2CdTe trigonal pyramids, and edges with three OMn2CdTe tetrahedra. In the third O2- site, O2- is bonded to one Mn2+, two Cd2+, and one Te6+ atom to form distorted OMnCd2Te tetrahedra that share corners with five OMnCd2Te tetrahedra, corners with seven OMn2CdTe trigonal pyramids, edges with three OMn2CdTe tetrahedra, and an edgeedge with one OCd3Te trigonal pyramid. In the fourth O2- site, O2- is bonded to one Mn2+, two Cd2+, and one Te6+ atom to form distorted OMnCd2Te tetrahedra that share corners with five OMn2CdTe tetrahedra, corners with five OMnCd2Te trigonal pyramids, edges with three OMn2CdTe tetrahedra, and an edgeedge with one OMn2CdTe trigonal pyramid. In the fifth O2- site, O2- is bonded to three Cd2+ and one Te6+ atom to form distorted OCd3Te tetrahedra that share corners with five OMn2CdTe tetrahedra, corners with five OMnCd2Te trigonal pyramids, edges with three OMnCd2Te tetrahedra, and an edgeedge with one OMnCd2Te trigonal pyramid. In the sixth O2- site, O2- is bonded to one Mn2+, two Cd2+, and one Te6+ atom to form distorted OMnCd2Te tetrahedra that share corners with five OMn2CdTe tetrahedra, corners with six OMn2CdTe trigonal pyramids, edges with three OMnCd2Te tetrahedra, and an edgeedge with one OMnCd2Te trigonal pyramid. In the seventh O2- site, O2- is bonded to two Mn2+, one Cd2+, and one Te6+ atom to form distorted OMn2CdTe trigonal pyramids that share corners with seven OMn2CdTe tetrahedra, corners with five OMnCd2Te trigonal pyramids, an edgeedge with one OMnCd2Te tetrahedra, and edges with two OMnCd2Te trigonal pyramids. In the eighth O2- site, O2- is bonded to one Mn2+, two Cd2+, and one Te6+ atom to form distorted OMnCd2Te trigonal pyramids that share corners with seven OMn2CdTe tetrahedra, corners with four OMn2CdTe trigonal pyramids, an edgeedge with one OCd3Te tetrahedra, and edges with two OMnCd2Te trigonal pyramids. In the ninth O2- site, O2- is bonded to one Mn2+, two Cd2+, and one Te6+ atom to form distorted OMnCd2Te trigonal pyramids that share corners with seven OMn2CdTe tetrahedra, corners with five OMn2CdTe trigonal pyramids, an edgeedge with one OMnCd2Te tetrahedra, and edges with two OMnCd2Te trigonal pyramids. In the tenth O2- site, O2- is bonded to one Mn2+, two Cd2+, and one Te6+ atom to form distorted OMnCd2Te trigonal pyramids that share corners with seven OMnCd2Te tetrahedra, corners with three OMn2CdTe trigonal pyramids, an edgeedge with one OMn2CdTe tetrahedra, and edges with three OMnCd2Te trigonal pyramids. In the eleventh O2- site, O2- is bonded in a 4-coordinate geometry to one Mn2+, two Cd2+, and one Te6+ atom. In the twelfth O2- site, O2- is bonded to three Cd2+ and one Te6+ atom to form a mixture of distorted corner and edge-sharing OCd3Te trigonal pyramids.