Electronic Resource
[S.l.]
:
International Union of Crystallography (IUCr)
Acta crystallographica
36 (1980), S. 734-736
ISSN:
1600-5724
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
Notes:
It is shown that the azimuthal angle ψ of rotation around the diffraction vector and the four angles χ0, χ, φ' and 90 - ω, all belong to one right spherical triangle from which the new relations sin ψ = sin χ sin φ' and cos φ' = cos ω cos ψ are derived. These angles are in fact related by ten trigonometric equations which can also be derived by matrix methods. The setting angles for a full ψ rotation of 360° are easily determined when results of both methods are used together.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S0567739480001465
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