Data type: numb
Related item: '_diffrn_ambient_pressure'
Related function: alternate
Enumeration range: 0.0 -> infinity
Units: kPa ( kilopascals)
The mean hydrostatic pressure in kilopascals above which (*_gt) or below which (*_lt) the intensities were measured. These items allow for a pressure range to be given. _diffrn_ambient_pressure should always be used in preference to these items whenever possible.