Figure 2
(a) The local coordination around a TeO6 octahedron in a Cu–Te–O layer. Key: CuO5 square pyramids are grey, and the Cu, Te and O atoms are dark grey, light grey and white, respectively. (b) The pseudo-hexagonal Cu honeycomb network in the Cu–Te–O layers. Two different Cu—Cu distances are present, viz. 3.615 (2) (thicker lines) and 3.067 (3) Å (thinner lines). The symmetry codes are as in Table 1. |