Materials Data on K3YbSe6 by Materials Project
KK2YbSe4(Se)2 crystallizes in the orthorhombic Cmmm space group. The structure is two-dimensional and consists of two potassium molecules; four selenium molecules; and one K2YbSe4 sheet oriented in the (0, 0, 1) direction. In the K2YbSe4 sheet, K1+ is bonded in a linear geometry to two equivalent Se1- atoms. Both K–Se bond lengths are 3.13 Å. Yb3+ is bonded in a distorted rectangular see-saw-like geometry to four equivalent Se1- atoms. All Yb–Se bond lengths are 2.81 Å. Se1- is bonded in a distorted linear geometry to one K1+, one Yb3+, and one Se1- atom. The Se–Se bond length is 2.44 Å.
36 MATERIALS SCIENCE↗