Rigaku R-AXIS RAPID diffractometer	6186 independent reflections
Radiation source: fine-focus sealed tube	3402 reflections with I > 2σ(I)
graphite	Rint = 0.030
ω scans	θmax = 27.5°, θmin = 3.2°
Absorption correction: multi-scan (ABSCOR; Higashi, 1995)	h = −12→10
Tmin = 0.987, Tmax = 0.990	k = −16→16
13506 measured reflections	l = −16→16