Optical Transform (X-Ray Diffraction): Demo Kit
Simulate X-ray diffraction using a visible laser and 2-D patterns on a transparency with the Optical Transform (X-Ray Diffraction) Kit. The kit includes a manual with directions, one each of the four different diffraction transparencies, and a full-page version of each transparency. The four diffraction transparencies have these patterns:
- Unit Cell: examples for changes in unit cell size, angle, and shape; for centering with like and different atoms; for glide symmetry
- Discovery: provides multiple examples for changes in orientation and in unit cell size; particularly appropriate for use in student investigations
- VSEPR: complements discussions of molecular geometry such as VSEPR rules and illustrates one way that geometry differences can be detected in a triatomic molecule
- Plane Groups: provides additional examples for the systematic absences that occur for centering and for glide symmetry
The manual provides step-by-step directions to lead you through demonstrating the Unit Cell transparency; investigative questions; and a reprint of the J. Chem. Ed article, "The Optical Transform: Simulating Diffraction Experiments in Introductory Courses" by George C. Lisensky, Thomas F. Kelly, Donald R. Neu, and Arthur B. Ellis.
A source of visible laser light is not included, but any laser pointer will work.
Additional copies of each of the four Optical Transform (X-Ray Diffraction) Transparencies are available separately from the Kit. Purchasing additional Optical Transform (X-Ray Diffraction) Transparencies enables hands-on activities and student participation.