ISSN:
1600-5724
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
Notes:
A semiquantitative analysis of the X-ray diffuse scattering from β-alumina between 20 K and room temperature shows the change with temperature of the organization of the conducting ions. The earlier reported low-temperature superstructure never achieves long-range order. Both the size of the 2D domains and the order within the domains, as reflected by the occupation factors, saturate around 77 K. Above this temperature, the size decreases from its saturation value of 45 Å to about 10 Å at 400 K, with a parallel decrease of the order inside the domains. The occupation factors could be determined up to 220 K, and they extrapolate at room temperature to values close to the average occupation determined by conventional structure analysis.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S0567739476000557
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