Solution of the structure and disorder of Ln13Br18B3 (Ln

Gd, Tb)

Verfasser / Beitragende:
[O. Oeckler, L. Kienle, Hj. Mattausch, O. Jarchow, A. Simon]
Ort, Verlag, Jahr:
2003
Enthalten in:
Zeitschrift für Kristallographie - Crystalline Materials, 218/5(2003-05-01), 321-331
Format:
Artikel (online)
ID: 378854828
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024 7 0 |a 10.1524/zkri.218.5.321.20736  |2 doi 
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245 0 0 |a Solution of the structure and disorder of Ln13Br18B3 (Ln  |h [Elektronische Daten]  |b Gd, Tb)  |c [O. Oeckler, L. Kienle, Hj. Mattausch, O. Jarchow, A. Simon] 
520 3 |a The average structures (Immm) of Gd13Br18B3 (A = 3.9923(2) Å, B = 17.0462(12) Å, C = 28.3039(19) Å) and Tb13Br18B3 (A = 3.9637(3) Å, B = 16.9063(13) Å, C = 28.1068(18) Å) were solved taking into account Bragg intensities only. The average structure contains an ordered honeycomb arrangement of chains formed from trans edge sharing Tb6B octahedra and disordered and partly occupied chains of double octahedra in the channels. Pronounced diffuse scattering which is elongated in [001]* indicates a 2D order of the structure. High resolution electron microscopy (HRTEM) gives insight into the nature of the ordering and leads to a model of discrete Tb10B2 clusters in the channels which are perfectly ordered in layers in a 2 × 2 × 2 supercell. These layers are randomly stacked with well defined translation values to each other along [100]. 
540 |a © 2003 Oldenbourg Wissenschaftsverlag GmbH 
690 7 |a Crystallography  |2 nationallicence 
690 7 |a Inorganic chemistry  |2 nationallicence 
690 7 |a Organic chemistry  |2 nationallicence 
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700 1 |a Kienle  |D L.  |4 aut 
700 1 |a Mattausch  |D Hj  |4 aut 
700 1 |a Jarchow  |D O.  |4 aut 
700 1 |a Simon  |D A.  |4 aut 
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