Materials Data on YbSe2 by Materials Project
YbSe2 crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Yb3+ is bonded in a 9-coordinate geometry to nine Se+1.50- atoms. There are a spread of Yb–Se bond distances ranging from 2.91–3.24 Å. There are two inequivalent Se+1.50- sites. In the first Se+1.50- site, Se+1.50- is bonded in a 8-coordinate geometry to four equivalent Yb3+ and four equivalent Se+1.50- atoms. All Se–Se bond lengths are 2.82 Å. In the second Se+1.50- site, Se+1.50- is bonded to five equivalent Yb3+ atoms to form a mixture of distorted edge and corner-sharing SeYb5 trigonal bipyramids.
36 MATERIALS SCIENCE↗