Enraf–Nonius CAD-4 diffractometer	1633 reflections with I > 2σ(I)
Radiation source: fine-focus sealed tube	Rint = 0.047
Graphite monochromator	θmax = 25.4°, θmin = 1.9°
ω/2θ scans	h = −4→4
Absorption correction: ψ scan (North et al., 1968)	k = −11→0
Tmin = 0.921, Tmax = 0.959	l = −26→26
3079 measured reflections	3 standard reflections every 200 reflections
2887 independent reflections	intensity decay: 1%