Table II. Heavy atom derivative statistics for rClfA_(221–559).

Heavy atom compound	Resolution (Å)	Rsyma (%)	Unique reflections	Solve		Phases
				Rcentric	R.M.S. (FH)/R.M.S.(E)	Rcullisb	Phasing powerc
(CH3)3PbOOCCH3	2.45	6.2	13 162	0.57	1.35	0.567	1.98
K2PtCl4	3.2	16.3	7177	0.64	1.22	0.657	1.15
PCMBS	3.0	7.2	7450	0.56	1.42	0.628	1.45

^aR_sym = Σ|Ih – <Ih>|/ΣIh, where <Ih> is the average intensity over symmetry equivalents.

^bR_cullis = Σ||F_PH ± F_P| – F_Hcalc|/Σ|F_PH – F_P|

^cPhasing power = Σ|F_H|/Σ||F_PHobs| – |F_PHcalc||