Indexing programs use only the positional information of the pattern and try to find a set of lattice constants(a, b,c, a, B,y)and individual Miller indices (hkl) for each line The form of equations to solve is complicated for the general case(triclinic)in direct space but is straightforward in reciprocal space. In the latter the set of equations is 苏五长 有一太苏 玉 长 Indexing programs use only the positional information of the pattern and try to find a set of lattice constants (a,b,c,a,b,g) and individual Miller indices (hkl) for each line. The form of equations to solve is complicated for the general case (triclinic) in direct space but is straightforward in reciprocal space. In the latter the set of equations is：