Index

Core dictionary version 3.3.0

_refine_diff.density_RMS

Definition:

   
    The root mean square density value in a difference Fourier map.
    This value is measured with respect to the arithmetic mean
    density and is derived from summations over each grid point
    in the asymmetric unit of the cell. This quantity is useful
    for assessing the significance of *_min and *_max values,
    and also for defining suitable contour levels.

Type: Real

Definition method:

    # Default units. Applicable to x-ray, electron and gamma radiation.
    _units.code = "electrons_per_angstrom_cubed"

    If (_diffrn_radiation.probe == "neutron")
        _units.code = "femtometres_per_angstrom_cubed"

Category:
refine_diff