A computer program for refinement of crystal orientation matrix and lattice constants from diffractometer data with lattice symmetry constraints

A linear least-squares computer program that implements the procedure described by Shoemaker & Bassi [Acta Cryst. (1970), A26, 97-101] has been written. With this technique constraints appropriate to the lattice symmetry may be imposed during refinement of the coefficients of the orientation matrix. Cell parameters and variances with the assumed lattice symmetry and the best least-squares agreement result from this calculation.