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 Results for DC.creator="J." AND DC.creator="R." AND DC.creator="Helliwell" in section 2.2.5 of volume C
Recording of cone-axis photograph
Helliwell, J. R.  International Tables for Crystallography (2006). Vol. C, Section 2.2.5.5, p. 36 [ doi:10.1107/97809553602060000577 ]
Recording of cone-axis photograph 2.2.5.5. Recording of cone-axis photograph A cone-axis photograph is recorded by placing a film enclosed in a light-tight envelope in the screen holder and using a small precession angle, e.g. 5 for a small molecule or 1 for a protein. The photograph has ...

Recording of upper-layer photographs
Helliwell, J. R.  International Tables for Crystallography (2006). Vol. C, Section 2.2.5.4, pp. 35-36 [ doi:10.1107/97809553602060000577 ]
Recording of upper-layer photographs 2.2.5.4. Recording of upper-layer photographs The recording of upper-layer photographs involves isolating the net of relp's at a distance from the zero layer of [zeta]n = n[lambda]/b, where b is the case of the b axis antiparallel to the X-ray ...

Recording of zero-layer photograph
Helliwell, J. R.  International Tables for Crystallography (2006). Vol. C, Section 2.2.5.3, p. 35 [ doi:10.1107/97809553602060000577 ]
Recording of zero-layer photograph 2.2.5.3. Recording of zero-layer photograph Before the zero-layer photograph is taken, an Nb filter (for Mo K[alpha]) or an Ni filter (for Cu K[alpha]) is introduced into the X-ray beam path and a screen is placed between the crystal and the ...

Crystal setting
Helliwell, J. R.  International Tables for Crystallography (2006). Vol. C, Section 2.2.5.2, p. 35 [ doi:10.1107/97809553602060000577 ]
Crystal setting 2.2.5.2. Crystal setting Setting of the crystal for one zone is carried out in two stages. First, a Laue photograph is used for small molecules or a monochromatic still for macromolecules to identify the required zone axis and place it parallel to the X-ray beam. This is done ...

General
Helliwell, J. R.  International Tables for Crystallography (2006). Vol. C, Section 2.2.5.1, p. 35 [ doi:10.1107/97809553602060000577 ]
General 2.2.5.1. General The precession method is used to record an undistorted representation of a single plane of relp's and their associated intensities. In order to achieve this, the crystal is carefully set so that the plane of relp's is perpendicular to the X-ray beam. The normal to ...

Precession geometry
Helliwell, J. R.  International Tables for Crystallography (2006). Vol. C, Section 2.2.5, pp. 35-36 [ doi:10.1107/97809553602060000577 ]
... of each circle is where Hence, . References Buerger, M. J. (1964). The precession method. New York: John Wiley. International ...

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