Enraf–Nonius CAD-4 diffractometer	Rint = 0.024
Radiation source: fine-focus sealed tube	θmax = 27.0°, θmin = 2.3°
graphite	h = −7→7
ω–2θ scans	k = −19→0
2262 measured reflections	l = −14→0
2157 independent reflections	3 standard reflections every 200 reflections
1141 reflections with I > 2σ(I)	intensity decay: 1%