Materials Data on Eu5(MoO6)2 by Materials Project
Eu5(MoO6)2 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are three inequivalent Eu+2.40+ sites. In the first Eu+2.40+ site, Eu+2.40+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Eu–O bond distances ranging from 2.37–2.60 Å. In the second Eu+2.40+ site, Eu+2.40+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Eu–O bond distances ranging from 2.35–2.60 Å. In the third Eu+2.40+ site, Eu+2.40+ is bonded to six O2- atoms to form EuO6 octahedra that share corners with four equivalent MoO6 octahedra. The corner-sharing octahedral tilt angles are 42°. There are four shorter (2.41 Å) and two longer (2.42 Å) Eu–O bond lengths. Mo6+ is bonded to six O2- atoms to form MoO6 octahedra that share corners with two equivalent EuO6 octahedra and edges with two equivalent MoO6 octahedra. The corner-sharing octahedral tilt angles are 42°. There are a spread of Mo–O bond distances ranging from 1.91–2.11 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded to three Eu+2.40+ and one Mo6+ atom to form a mixture of distorted edge and corner-sharing OEu3Mo tetrahedra. In the second O2- site, O2- is bonded to four Eu+2.40+ atoms to form OEu4 tetrahedra that share corners with thirteen OEu2Mo2 tetrahedra and edges with four OEu4 tetrahedra. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one Eu+2.40+ and two equivalent Mo6+ atoms. In the fourth O2- site, O2- is bonded to two Eu+2.40+ and two equivalent Mo6+ atoms to form distorted OEu2Mo2 tetrahedra that share corners with eight OEu4 tetrahedra and edges with five OEu2Mo2 tetrahedra.