Enraf–Nonius CAD-4 four-circle diffractometer	1228 reflections with I > 2σ(I)
Radiation source: fine-focus sealed tube	Rint = 0.000
Graphite monochromator	θmax = 25.4°, θmin = 1.5°
ω–2θ scans	h = −17→17
Absorption correction: ψ scan (North et al., 1968)	k = 0→5
Tmin = 0.980, Tmax = 0.990	l = 0→25
2722 measured reflections	3 standard reflections every 200 reflections
2722 independent reflections	intensity decay: 1%