Caos
is a crystallographic package for crystal
structure determination from single crystal diffraction data.The first version of the Caos
program was written at the early years of the 70's. (Cerrini S. & Spagna R. (1977)
Crystallographic software for a mincomputer, IV Eur. Crystallgr.Meet., Oxford, UK,
Abstract A-212). At the present, Caos covers most of the crystallographic calculation:
data reduction, intensity statistics, Fourier and Patterson synthesis, automatic Patterson
solution, peaks interpretation, structure factor and least squares calculation with user
defined blocked matrix, geometrical calculation, molecular display, publication tables,
CIF files. Space group restrictions are handled automatically and it is possible introduce
restraints in the refinement and many weighting schemes are available. Furthermore,
hydrogen atoms can be calculated from model.