ISSN:
0044-2313
Keywords:
Rare-Earth Iodides
;
Synthesis
;
Crystal Structure
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
[M9C4O]I8 (M = Y, Ho, Er, Lu), Reduced Rare-Earth Iodides with Waved Metal Double Layers and Two Different Interstitial Atoms[M9C4O]I8 (M = Y, Ho, Er, Lu) are examples of reduced rare-earth iodides with two different interstitial atoms. The compounds were synthesized from appropriate mixtures of MI3, M, C and M2O3 at 1 050°C in arc-welded tantalum containers. The X-ray structure analysis of a single crystal of [Y9C4O]I8 (orthorhombic, Pmmn (Nr. 59), Z = 2, a = 2 912.7(6) pm, b = 384.17(4) pm, c = 1 080.29(9) pm, R = 0.084, Rw = 0.053) exhibits octahedrally coordinated carbon in “plane” sections besides tetrahedrally coordinated oxygen in the “bend” of waved metal double layers. These double layers are stacked alternately with waved iodine double layers along [001].
Notes:
Mit [M9C4O]I8 (M = Y, Ho, Er, Lu) wurden reduzierte Selten-Erd-Iodide erhalten, die zwei verschiedene interstitielle Atomsorten enthalten. Die Synthese erfolgt aus geeigneten Gemengen von MI3, M, C und M2O3 bei 1 050°C in verschweißten Tantalampullen. Die Röntgenstrukturanalyse an einem Einkristall von [Y9C4O]I8 (orthorhombisch, Pmmn (Nr. 59), Z = 2, a = 2 912,7(6) pm, b = 384,17(4) pm, c = 1 080,29(9) pm, R = 0,084, Rw = 0,053) zeigt, daß neben oktaedrisch umgebenen Kohlenstoffatomen in “planaren” Abschnitten, tetraedrisch koordinierte Sauerstoffatome in “Knickstellen” gewellter Metall-Doppelschichten vorliegen. Diese Doppelschichten sind alternierend mit gewellten Iod-Doppelschichten längs [001] gestapelt.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19936190811
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