Eu8(NCN)5–(delta)I6+2(delta)((delta)= 0.05): a novel rare-earth carbodiimide iodide containing oligomeric tritetrahedral Eu8 clusters

Eu8(NCN)4.95I6.10 is the first compound with discrete tritetrahedral Eu8 clusters which are interconnected by coordinating NCN^2- carbodiimide anions on their triangular faces to form separated layers, the latter being bridged by iodide and carbodiimide anions.