Siemens P4 diffractometer	Rint = 0.028
Radiation source: fine-focus sealed tube	θmax = 30.0°, θmin = 1.7°
graphite	h = −1→20
ω/2θ scans	k = −1→8
4529 measured reflections	l = −21→20
3483 independent reflections	3 standard reflections every 97 reflections
2517 reflections with I > 2σ(I)	intensity decay: none