Silicon can be used to calibrate WAXS detectors (e.g. INEL, MSGC). The prominent peaks are listed below the scattering curve.

sipeaks.gif (Silicon peaks)

H K L d-spacing/Å Angle/°
111 3.1355 9.14628
220 1.9201 14.96249
311 1.6374 17.56393
222 1.5677 18.35156
400 1.3577 21.22116
331 1.2459 23.15043
422 1.1085 26.06643
333 1.0451 27.67815
511 1.0451 27.67815
440 0.9600 30.18796
531 0.9179 31.60668
442 0.9051 32.0635
620 0.8586 33.85153
533 0.8281 35.13871
622 0.8187 35.55841
444 0.7838 37.19614
711 0.7604 38.38497
551 0.7604 38.38497
642 0.7257 40.30023

 

For more information on Si standards one is referred to the website of NIST.
(Note: the diffraction angles refer to experiments with lambda = 0.5 Å. Where NIST has used Cu Kα radiation.)