Introduction
The program Bond_Str calculates distances and angles in crystal structures. It is based in old Fortran 77 versions but is has been completely re-written and it is now based in CrysFML (Crystallographic Fortran 95 Modules Library).
The most reliable bond-valence parameters (based in the file bvparm.cif from I.D. Brown) , but, alternatively, user-given bond-valence parameters can be read form the input file instead of using the internal parameters.
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