Fig. 13.7. Two projections of the cluster [Cu 70 Se 73 (PR 3 ) 21 ] 9
illustrating the layered nature of the selenium framework (top)
and the overall triangular shape (bottom) of the cluster (carbon
atoms not illustrated) [37, 39].
13.3 Group XI Chalcogenides 427
illustrating the layered nature of the selenium framework (top)
and the overall triangular shape (bottom) of the cluster (carbon
atoms not illustrated) [37, 39].
13.3 Group XI Chalcogenides 427