σ(*F*^0^) is used only for calculating *R*-factors(gt) *etc*. and is not relevant to the choice of reflections for refinement. *R*-factors based on *F*^0^ are statistically about twice as large as those based on *F*, and *R*- factors based on ALL data will be even larger.   ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------  Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å^0^) {#tablewrapcoords} ==================================================================================================    ------ -------------- -------------- -------------- -------------------- ------------          *x*            *y*            *z*            *U*~iso~\*/*U*~eq~   