P. Krishna and D. Pandey*
Department of Physics, Banaras Hindu University, Varanasi, India
help towards an understanding of the way in which close packed
structures may be described and begin to bridge the gap between
theoretical abstractions of crystallography and the world of real
It would be most appropriate
in the later years of undergraduate courses, especially those in
materials science. It could also form an element in a postgraduate
course for newcomers to the subject.
A general familiarity with
cystal lattices, crystal symmetry, the regional lattice and the baisic
principles of X-ray diffraction such as might be given in an
introductory course is assumed.
models are essential in understanding the material in this article. An
X-ray generator and rotation camera would be helpful.
Time required for teaching
represents about 6 hours teaching if adequate use of models is to be
made. Futher time for X-ray photgraphy of suitable single crystals of
close packed structures would be an advantage.
* Now at the School of Materials Science and Technology, Banaras, Hindu