Verfeinerung der Kristallstruktur von Te2O3(SO4) |
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Authors: | Dr. Helmut Mayer Günther Pupp |
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Affiliation: | (1) Institut für Mineralogie, Kristallographie und Strukturchemie, Technische Universität Wien, Getreidemarkt 9, A-1060 Wien, Österreich |
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Abstract: | 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
Mit 3 Abbildungen Herrn Prof. Dr.R. Kieffer zu seinem 70. Geburtstag gewidmet. |
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