PLUTON - Uiso
This toggle switches between covalent radii and Uiso (not sqrt(Uiso))
assigned to atoms for display. This function can be useful to identify
misassigned atom types in the process of a structure determination.
note: This option is available only for a PLUTON (native) run on
a shelx.res file with isotropic atoms (i.e. 6 numbers per atom).
PLATON HOMEPAGE
04-Apr-2002 A.L.Spek