Figure 1
The average unit cell of Cu1.95Se found by Roth & Iversen (2019 ). Cu atoms are blue while Se atoms are green. Partial occupancy is marked by filling fractions. Atoms are arranged in layers perpendicular to the c axis (marked `Layer'). Based on analysis of the diffuse scattering these layers are completely ordered in the real structure (see text). Each layer consists of sublayers marked Cu1a, Cu1b, Cu2 and Se (two of each sublayer are present in each layer) which are also perpendicular to the c axis. The figure was made with VESTA (Momma & Izumi, 2011 ). |