Electronic Resource
[S.l.]
:
International Union of Crystallography (IUCr)
Acta crystallographica
29 (1973), S. 618-621
ISSN:
1600-5724
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
Notes:
Twinning has been studied in several samples of VO2 containing in substitution solid solution 0.5 and 2.5 at.% Cr. The twinning is by reticular pseudo-merohedry and it is controlled by the tetragonal pseudo-symmetry of a superlattice obtained from the original monoclinic cell (a ∼ 9.1, b ∼ 5.8, c ∼ 4.5 Å, β ∼ 90°) by means of the transformation 109/002/0{\bar 1}0. More than one twin law is found in every sample studied. All the theoretically possible twin laws, except one, have been observed. The possibility of twinning simulating a lattice and a space group different from the true ones has been pointed out and methods for detecting twins in these cases are given.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S0567739473001592
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