On the Crystal Chemistry of Oxometallates of Thorium

Hanskarl Mueller-Buschbaum (1) , Dummy User

1 Institut fuer Anorganische Chemie

The crystal chemistry of the valence stable Thorium (Th4+) shows in Oxovanadates,-niobates, -molybdates, -tantalates etc. typical cationic property. It depends on the big size of the Th4+ ion in the order of RTh4+ = 0.92Ã... (CN = 6) up to RTh4+ = 1,34Ã... (CN = 12), comparable with the radii of alkaline and alkaline earth metals: RNa+ = 1,02Ã... (CN = 6) or RK+ = 1,5Ã... (CN = 8); RCa2+/Sr2+ = 1,1Ã.../1,26Ã... (CN = 8). There exists only one typical compound that may be of the type of Oxothorates with the composition NaK3Th2O6. Na+ and K+ can be declared to be components of the cationic part of the crystal structure. In contrary thorium and oxygen are common components of the anionic part of the crystal structure. From the point of view of the shared polyhedra (exclusively octahedra) NaK3Th2O6 belongs to the thorium-oxometallates too.

Mots clés: Physical Sciences

Hanskarl Mueller-Buschbaum, Dummy User. On the Crystal Chemistry of Oxometallates of Thorium. Journal of Inorganic and General Chemistry / Zeitschrift für anorganische und allgemeine Chemie, 2009, 635 (8), pp.1065. ⟨10.1002/zaac.200900039⟩. ⟨hal-00482071⟩