(IUCr) CIF Definition save__diffrn_scan_axis.reference_angle

DRAFT DICTIONARY CBF/imgCIF Extensions Dictionary | Draft version 1.5 for comment

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Index

##### Image dictionary (imgCIF) version 1.5.4

# _diffrn_scan_axis.reference_angle

Name:
`'_diffrn_scan_axis.reference_angle'`

Definition:

            The setting of the specified axis in degrees
                   against which measurements of the reference beam center
                   and reference detector distance should be made.

                   In general, this will agree with
                   _diffrn_scan_frame_axis.reference_angle.

                   If the individual frame values vary, then the value of
                   _diffrn_scan_axis.reference_angle will be
                   representative of the ensemble of values of
                   _diffrn_scan_frame_axis.reference_angle (e.g.
                   the mean).

                   If not specified, the value defaults to zero.

Type: float

Mandatory item: implicit

Enumeration default: 0.0

Category: diffrn_scan_axis

#### HTML version of draft dictionary created by modified version of makedicthtml by B. McMahon from modified version of imgCIF dcitionary 1.3.2 which is subject to the following copyright:

Copyright © 2005 International Union of Crystallography