Siemens P4 diffractometer	2843 reflections with I > 2σ(I)
Radiation source: sealed tube	Rint = 0.036
graphite	θmax = 25.0°, θmin = 2.0°
ω scans	h = −12→12
Absorption correction: ψ scan (Kopfmann & Huber, 1968)	k = −1→11
Tmin = 0.870, Tmax = 0.968	l = −27→27
9535 measured reflections	3 standard reflections every 197 reflections
4347 independent reflections	intensity decay: none