Crystal Structure and Physical Properties of the Cage Compound Hf2B2-2δIr5+δ.

Hf2B2–2δIr5+δ crystallizes with a new type of structure: space group Pbam, a = 5.6300(3) A, b = 11.2599(5) A, and c = 3.8328(2) A. Nearly 5% of the boron pairs are randomly replaced by single iridi...