Program Stereo: A Fortran-Language Program for Plotting Stereographic Projections of Lattice Plane Normals and Directions

摘要

The report describes a computer program, written in FORTRAN-63 language, that may be used to plot general stereographic projections of lattice plane normals and directions for any crystal system. The basic CALCOMP plotting package for the FORTRAN language is assumed. The central axis of the projection (plotter +z) may be any specified lattice direction or plane normal. A reference plane normal in the +x plotter axis may be selected by the user or by the program. Projections of plane normals whose indices lie within chosen ranges or whose interplanar spacings exceed a chosen minimum value may be plotted. The user may elect to draw projections of equatorial circles about specified lattice directions and/or projections of the directions themselves. Operations involving plane normals and directions in a given lattice may be interchanged by supplying parameters of the corresponding reciprocal lattice as input data. (Author)