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X‐ray powder diffraction of β‐aluminas
Author(s) -
Massarotti V.,
CampariVigano G.,
Flor G.,
Marini A.,
Farrington G. C.,
Villa M.
Publication year - 1982
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889882012448
Subject(s) - powder diffraction , diffraction , crystallography , materials science , reflection (computer programming) , x ray , x ray crystallography , analytical chemistry (journal) , chemistry , optics , chromatography , physics , computer science , programming language
The structure of the β ‐alumina mirror plane is investigated with a powder diffraction technique in several crystals: Ag β , dehydrated Na β and hydrated Na β . At 295 and 423 K, an Ag + distribution is found which agrees with that reported in the literature. With increasing temperature from 423 to 879 K, the Ag + fraction in the aBR (anti‐Beevers–Ross) sites decreases from 0.34 to 0.15. Hydration of Na β ‐alumina crystals does not seem to cause an appreciable change in the Na + distribution. Analysis of the reflection intensities gives the exact quantity of absorbed water.