Verfeinerung der Kristallstruktur von Te2O3(SO4)
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Refinement of the crystal structure ofTe2O3(SO4)
The crystal structure of ditellurium(IV)-trioxide sulfate, Te2O3(SO4)—space group Pmn21−C2v7;a=8.879 (2),b=6.936 (2),c=4.646 (4) Å,Z=2—has been determined and refined by least-squares, using three-dimensionalX-ray data (1188 independent reflexions) to a final R-value of 6.3%.
The crystal structure comprises puckered tellurium(IV)—oxygen layers in which the tellurium atoms are linked together by three oxygen bridges (Te−O 1.907, 1.945, 2.011 Å). The SO4 groups are arranged between these layers. Two oxygen atoms of each SO4 group are bonded to two adjacent tellurium atoms of one layer [Te−O(→S) 2.270 Å] and the tellurium atoms show a (3+1) coordination. A third oxygen atom of the SO4 group is in weak interaction with two adjacent tellurium atoms of the same layer (Te−O 2.603 Å) whereas the fourth oxygen atom has distances of 2.866 Å to two adjacent tellurium atoms of the next layer and effects a very weak interaction between the\(_ \propto ^2 Te_2 O_3 - layers.\)
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