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Angle settings for rotation around the diffraction vector for four-circle diffractometers (1976)

Wang, B. C. ; Yoo, C. S. ; Pletcher, J. ; [et al.]

[S.l.] : International Union of Crystallography (IUCr)

Acta crystallographica 32 (1976), S. 918-919

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ISSN: 1600-5724

Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001

Topics: Chemistry and Pharmacology , Geosciences , Physics

Notes: Simple graphical representations have been found which have led to the discovery of new geometrical relations between the angle settings, χ0, ω, χ and φ-φ0, of a four-circle single-crystal diffractometer, and the azimuthal angle, ψ, of the diffraction vector. The new geometric relations greatly simplify the derivation of the trigonometric equations which relate the angle settings with the rotation around the diffraction vector. One of these equations, tan χ = tan χ0/cos (φ - φ0), is given here for the first time. The others are similar in form to those derived previously with matrix methods.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1107/S0567739476001848

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