Abstract

β-PtO 2 crystallizes as the orthorhombic CaCl 2-type structure with a = 4·488(3) A ̊ , b = 4·533(3) A ̊ , and c = 3·138(2) A ̊ . The oxygen coordinates are found to be: x= 0·281 and y = 0·348. This leads to two long PtO bonds of 2·02 Å, four short bonds of 1·98 Å, and a mininum oxygen-oxygen approach of 2·40 Å. The Pt(IV) radius is 0·63 Å. A comparison of the PtO 2 structure with the rutile form of TiO 2 is presented.

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