Materials Data on Na(YbSe2)3 by Materials Project

YbNa(YbSe2)2(Se)2 crystallizes in the orthorhombic Cmmm space group. The structure is two-dimensional and consists of four selenium molecules; two ytterbium molecules; and one Na(YbSe2)2 sheet oriented in the (0, 0, 1) direction. In the Na(YbSe2)2 sheet, Na1+ is bonded in a distorted rectangular see-saw-like geometry to four equivalent Se+1.67- atoms. All Na–Se bond lengths are 2.95 Å. Yb3+ is bonded in a linear geometry to two equivalent Se+1.67- atoms. Both Yb–Se bond lengths are 2.73 Å. Se+1.67- is bonded in a distorted linear geometry to one Na1+, one Yb3+, and one Se+1.67- atom. The Se–Se bond length is 2.52 Å.

YbNa(YbSe₂)₂(Se)₂晶体属于正交晶系（orthorhombic），空间群为Cmmm。该晶体结构为二维结构，包含四个硒分子、两个镱分子，以及一片沿(0, 0, 1)方向取向的Na(YbSe₂)₂片层。在该Na(YbSe₂)₂片层中，Na⁺以畸变矩形跷跷板型配位几何与四个等价的Se⁺1.67⁻成键，所有Na-Se键长均为2.95 Å。Yb³⁺以直线型配位几何与两个等价的Se⁺1.67⁻成键，二者的Yb-Se键长均为2.73 Å。Se⁺1.67⁻以畸变直线型配位几何与一个Na⁺、一个Yb³⁺以及一个Se⁺1.67⁻原子成键，Se-Se键长为2.52 Å。