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Zeitschrift für Kristallographie - Crystalline Materials

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Die Kristallstruktur von Te2O3 (HPO4)

Helmut Mayer

Citation Information: Zeitschrift für Kristallographie. Volume 141, Issue 5-6, Pages 354–362, ISSN (Online) 0044-2968, ISSN (Print) 1433-7266, DOI: 10.1524/zkri.1975.141.5-6.354, July 2010

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Single crystals of ditellurium(IV)-trioxid-hydrogenphosphate Te2O3 (HPO4) were prepared by hydrothermal synthesis and the crystal structure has been determined from three-dimensional x-ray data (Weissenberg photographs, Cu radiation). The crystals are orthorhombic, space group Pca21C2v5, with a = 10.232, b = 7.012, c = 7.928 Å and Z = 4. The atomic positions were obtained from Patterson and Fourier maps and refined to an R value of 9.95% using 513 independent reflections.

The crystal structure comprises puckered tellurium(IV)-oxygen layers in which the tellurium atoms are linked together by three oxygen bridges respectively. The HPO4 groups are arranged between these layers whereby two oxygen atoms of each group are bonded to two adjacent tellurium atoms of one layer and a third oxygen atom is in a weak interaction with one of the two independent tellurium atoms of the next layer. The tellurium atoms show a one-side coordination to four oxygen atoms which is typical for tellurium(IV). The average axial Te–O distances are 2.07 and 2.06 Å; the average equatorial Te–O distances are 1.89 and 1.85 Å.

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