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International
Tables for Crystallography Volume G Definition and exchange of crystallographic data Edited by J. R. Hester and B. McMahon © International Union of Crystallography 2026 |
International Tables for Crystallography (2026). Vol. G. Early view chapter
https://doi.org/10.1107/97809553602060001011 Chapter 4.2 Core dictionary (coreCIF) |
Core dictionary version 3.3.0
_refine_ls.F_calc_precision
Name:_refine_ls.F_calc_precision
Alias:
_refine_ls_F_calc_precision
Definition:
Estimate of the precision resulting from the numerical
approximations made during the evaluation of the structure
factors using the expression _refine_ls.F_calc_formula
following the method outlined in _refine_ls.F_calc_details.
Type: Real
The permitted range is 0.0 → infinity
Definition method:
If (_diffrn_radiation.probe == "neutron") _units.code = "femtometres"
Else If (_diffrn_radiation.probe == "electron") _units.code = "volts"
Else _units.code = "electrons"
Category:
refine_ls
