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BGMN has an impressive set of features which are not to be found in this form in other Rietveld programs. The most important are:
Fully automatic calculation which requires no user interaction
best numerical algorithms specially designed for BGMN which guarantee an extreme numerical stability
physical based peak model which eliminates the refinement of peak profile parameters (no more refinement of u, v, w)
automated background refinement
unlimited number of phases, parameters, measuring points etc.
Correction of strong and multiple preferred orientation with spherical harmonics:
can correct the strong preferred orientation of phyllosilicates
can correct the PO of phases with multiple cleavage
automatic decision about applicability of complicated models
Pre-defined models for microstructure related line broadening effects:
refinement of crystallite size broadening effects with 1-2 parameters per phase; 6-7 in anisotropic case
refinement of microstrain with one parameter per phase; 6 or 15 in anisotropic case
Phase analysis of disordered layer silicates by implementation of advanced real structure models (e.g. for kaolinite and chlorites)
succesful description of strong disordered kaolinite
modelling of turbostratically disordered phases possible, e.g. smectites
Correction of microabsorption with the Brindley model
only the mean particle size has to be provided
Calculation of amorphous content by an internal standard method possible
Structure interpreter language for free definition of new parameters and constraints between parameters
This language includes special features for structure investigation and refinement:
enables the definition of rigid and non-rigid bodies
non-rigid bodies may be distorted by shifting, rotation or torsion of the whole or parts of them
built in force field model to ensure optimal distances between the atoms and to guarantee chain concatenation
