Synthese und Kristallstruktur von Te3O3(PO4)2, einer Verbindung mit fünffach koordiniertem Tellur(IV) |
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Authors: | Helmut Mayer Matthias Weil |
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Abstract: | Synthesis and Crystal Structure of Te3O3(PO4)2, a Compound with 5‐fold Coordinate Tellurium(IV) Polycrystalline Te3O3(PO4)2 is formed during controlled dehydration of (Te2O3)(HPO4) with (Te8O10)(PO4)4 as an intermediate product. Colourless single crystals were prepared by heating stoichiometric amounts of the binary oxides P2O5 und TeO2 in closed silica glass ampoules at 590 °C for 8 hours. The crystal structure (P21/c, Z = 4, α = 12.375(2), b = 7.317(1), c = 9.834(1)Å, β = 98.04(1)°, 1939 structure factors, 146 parameters, RF2 > 2σ(F2)] = 0.0187, wR2(F2 all) = 0.0367) was determined from four‐circle diffractometer data and consists of TeO5] polyhedra und PO4 tetrahedra as the main building units. The framework structure is made up of cationic zigzag‐chains of composition Te2O3]2+ which extend parallel to 001] and anionic Te(PO4)2]2— units linked laterally to these chains. This leads to the formation of Te2O3]Te(PO4)2] layers parallel to the bc plane which are interconnected via weak Te‐O bonds. |
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Keywords: | Selenium Tellurium System P2O5— TeO2 Crystal structure |
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