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 Results for DC.creator="J." AND DC.creator="I." AND DC.creator="Langford" in section 5.2.3 of volume C
Extrapolation, graphical and analytical
Parrish, W., Wilson, A. J. C. and Langford, J. I.  International Tables for Crystallography (2006). Vol. C, Section 5.2.3.2, pp. 493-494 [ doi:10.1107/97809553602060000596 ]
... X-ray powder photographs. Z. Kristallogr. 94, 306-310. Ferguson, I. F., Rogerson, A. H., Wolstenholme, J. F. R., Hughes, T. E. & Huyton, A. (1987). FIRESTAR ... R-909(S). London: HMSO, February 1987. Gillham, C. J. (1971). Centroid shifts due to axial divergence and ...

Aberrations
Parrish, W., Wilson, A. J. C. and Langford, J. I.  International Tables for Crystallography (2006). Vol. C, Section 5.2.3.1, p. 493 [ doi:10.1107/97809553602060000596 ]
... be difficult. Aberrations can be divided broadly into two classes: (i) geometrical and (ii) physical. The geometrical aberrations are those that ... position of the line profile. The three usual features are: (i) the centroid (centre of gravity, mean, average) of the wavelength ... centroid and W the variance of the geometrical aberrations and I'' and I''' are second and third derivatives of the ...

Geometrical and physical aberrations
Parrish, W., Wilson, A. J. C. and Langford, J. I.  International Tables for Crystallography (2006). Vol. C, Section 5.2.3, pp. 493-494 [ doi:10.1107/97809553602060000596 ]
... be difficult. Aberrations can be divided broadly into two classes: (i) geometrical and (ii) physical. The geometrical aberrations are those that ... position of the line profile. The three usual features are: (i) the centroid (centre of gravity, mean, average) of the wavelength ... centroid and W the variance of the geometrical aberrations and I'' and I''' are second and third derivatives of the ...

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