Date: Thu, 07 Mar 2002 11:42:36 -0500

Author: Tony Papirio

Subject: Crystal Difraction Simmulators


I am in search of a vendor that would carry a set
"optical crystals". These are not actually crystals, but instead are a
set of glass slides (diffraction plates) which have various patterns of
dots on each. The patterns are arranged to imitate the arrangement of
atoms in a crystal lattice. When a laser is shined onto a slide, an
optical diffraction pattern is projected, which is a visual
representation of the X-ray diffraction pattern generated from a real
crystal with the same lattice arrangement as the slide. They allow a
teacher to demonstrate students the x-ray diffraction patterns
associated with different crystalline structures.
The set I have has an address on it: Bergsten
Diffraction Plates, Palmyra Wisconsin but I have been unable to locate
this company. If anyone knows of another source for these I'd appreciate
knowing what
that source is.



Tony Papirio
Lab Director Physics Teaching Labs
Dept. of Physics (fax) 413-545-1691
218 Hasbrouck Physics Lab (voice)413-545-1296
University of Massachusetts Email:
Amherst, MA, 01003-3720