High Density Polyethylene (HDPE) can be used to obtain a rough spatial calibration of the WAXS detector (e.g. INEL or MSGC). The prominent peaks are listed below the scattering curve. In general it is useful to obtain a HDPE pattern even when a more accurate calibration with Si powder is performed. Si powder peaks all have the same appearance. The HDPE pattern, superimposed on the Si pattern allows for a simple recognition and indexing of the Si pattern.

HDPE

H K L d-spacing/Å Angle/°
110 4.166 21.3
200 3.78 23.5
210 3.014 29.6
020 2.49 36.0