Re: Suitable standards for Inel PSD calibration

Ian Madsen ( ian.madsen@minerals.csiro.au )
Wed, 01 Apr 1998 13:36:20 +1000

At 16:58 31/03/98 -0800, you wrote:
>Hi everyone,
>
>I am looking for suitable compounds to be used to calibrate a 90
>degree Inel curved PSD (Position Sensitive Detector). The ideal standard
>should be stable, easy to prepare or easily available, well crystalline
>(gives strong diffraction peaks), with a large enough yet non-fcc unit
>cell (~ 10 angstrom) to give many well resolved peaks. In the literature
>Na2Ca3Al2F14 is mentioned, but its synthesis seems not that
>straightforward and we can use a substitute.
>
>Any recommendations or suggestions here? Thank for any help in advance.
>

Try Y2O3 - it has a large cubic unit cell (10.5A) and produces well
separated peaks approximately every degree (Cu Ka). It is readily
available, stable etc.., but should be heated (1200C for 2-3 days) to
remove any traces of size/strain broadening. The only problem is the lack
of low angle peaks.

Cheers

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