checkCIF procedure

PLAT051

 In the ideal case, both Mu(calc) and Mu(cif) values should be the same within
 a small tolerance. If not, the reason for the difference should be clear.
 PLATON/checkCIF calculates Mu(calc) based on mu/Rho values tabulated in the
 Int. Tables for wavelengths Cu(Ka), Mo(Ka) and Ag(Ka). For other wavelengths, 
 such as those for Synchrotron, Ga(Ka) and In(Ka) sources, those values are
 calculated following S. Brennan & P.L. Cowan (1992). Rev. Sci. Instr., 63,
 850-853. Those values may differ slightly from values calculated with
 alternative external tools, in particular for wavelengths near absorption
 edges. The mu/Rho values used by PLATON/checkCIF for other wavelengths can be
 listed with the PLATON instruction 'ANOM wavelength'.