Pr16Mo21O56
Patrick Gougeon, Philippe Gall
Acta Crystallographica Section E · 2011
doi:10.1107/s1600536811015649 (opens in a new tab)
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Abstract
The structure of hexadecapraseodymium henicosamolybdenum hexapentacontaoxide, Pr16Mo21O56, is isotypic with other rare earth representatives of formula type RE16Mo21O56 (RE = La, Ce, Nd). It is characterized by Mo10O18iO8a units (where i = inner and a = apical O atoms) containing bioctahedral Mo10 clusters and octahedral MoO6 units that share some of their O atoms to form the Mo–O framework. The two independent Mo10 cluster units are centred at Wyckoff positions 2b and 2c and have point-group symmetry overline{1}. The Mo atom of the MoO6 unit is likewise situated at an inversion centre (2d). The eight crystallographically different Pr3+ cations occupy irregular voids in the framework with coordination numbers to the O atoms varying between 8 and 11.
Abstract licence: CC BY
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