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Optimal Calibration Curves for Guinier-Type Focusing Cameras
Published online by Cambridge University Press: 06 March 2019
Abstract
The inclusion of an internal calibrant in specimens prepared for Guinier-type focusing cameras is a well-established practice. The true reasons for performing calibration are, however, not always clearly understood. Accordingly, procedures adopted on the basis of this calibration for converting distances measured on the film into reliable values of θ vary in detail from one laboratory to another. The possibility that calibration curves can exhibit different degrees of reliability, depending upon camera alignment, is even less generally appreciated. The following account records efforts made over the years to come to terms with these problems in order to obtain unit cell dimensions at the 0.01 % level of precision from the routine measurement of Guinier diffraction patterns.
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- Copyright © International Centre for Diffraction Data 1977