#

Index

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

# _diffrn_radiation.polarisn_ratio

**Name:**

`'_diffrn_radiation.polarisn_ratio'`
**Definition:**

Polarization ratio of the diffraction beam incident on the
crystal. This is the ratio of the perpendicularly polarized to
the parallel polarized component of the radiation. The
perpendicular component forms an angle of
_diffrn_radiation.polarisn_norm to the normal to the
diffraction plane of the sample (i.e. the plane containing
the incident and reflected beams).

**Type:** float

**Mandatory item:** no

**Alias:**

` _diffrn_radiation_polarisn_ratio`
(cif_core.dic
version 2.0.1)

The permitted range is [0.0, infinity)

**Category:** diffrn_radiation

####
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