Bruker P4 diffractometer	Rint = 0.025
Radiation source: fine-focus sealed tube	θmax = 27.5°, θmin = 3.2°
graphite	h = −7→5
2θ/ω scans	k = −9→1
2559 measured reflections	l = −14→14
1233 independent reflections	3 standard reflections every 97 reflections
1042 reflections with I > 2σ(I)	intensity decay: 0.5%