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Diffraction standard
In
crystallography
, a
diffraction
standard
, or
calibration
crystal
, is a crystal used to
calibrate
an
X-ray spectrometer
to an
absolute
X-ray
energy scale
.
Quartz
or
silicon
crystals
are typically used. There are also
reports
of crystals of
silver behenate
or
silver stearate
having been used for this
purpose
.