Powder pattern indexing with the dichotomy method

The efficiency of the successive dichotomy method for powder diffraction pattern indexing [Louër & Louër (1972). J. Appl. Cryst . 5 , 271–275] has been proved over more than 30 years of usage. Features implemented in the new version of the computer program DICVOL 04 include (i) a tolerance to the presence of impurity (or inaccurately measured) diffraction lines, (ii) a refinement of the `zero-point' position, (iii) a reviewing of all input lines from the solution found from, generally, the first 20 lines, (iv) a cell analysis, based on the concept of the reduced cell, to identify equivalent monoclinic and triclinic solutions, and (v) an optional analysis of input powder data to detect the presence of a…