)\]^-0/0^   Primary atom site location: structure-invariant direct methods   Extinction coefficient: 0.000 (0)   ---------------------------------------------------------------- ----------------------------------------------------------------------------------------------------  Special details {#specialdetails} ===============    ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------   Geometry. Bond distances, angles *etc*. have been calculated using the rounded fractional coordinates. All su\'s are estimated from the variances of the (full) variance-covariance matrix. The cell e.s.d.\'s are taken into account in the estimation of distances, angles and torsion angles   Refinement. Refinement o