Materials Data on Na2EuGeSe4 by Materials Project

Abstract

Na2EuGeSe4 crystallizes in the tetragonal I-42m space group. The structure is three-dimensional. Na1+ is bonded in a 8-coordinate geometry to eight equivalent Se2- atoms. There are four shorter (3.03 Å) and four longer (3.58 Å) Na–Se bond lengths. Eu2+ is bonded in a 8-coordinate geometry to eight equivalent Se2- atoms. There are four shorter (3.07 Å) and four longer (3.54 Å) Eu–Se bond lengths. Ge4+ is bonded in a tetrahedral geometry to four equivalent Se2- atoms. All Ge–Se bond lengths are 2.41 Å. Se2- is bonded in a 4-coordinate geometry to four equivalent Na1+, two equivalent Eu2+, and one Ge4+ atom.