Angels between crystal planes for non cubic metals?

Aug 04, 2004 2 Replies

Hi All,



I'm trying to find the equation for calculating angles between 2 crystal planes for non-cubic metals. (Sn, for example, is body centered tetragonal.) Does anyone know how this is done?



Thanks!


There is a list of equations for interplanar angles of various crystal structures. You can find it in "Elements of X-Ray Diffraction" by Cullity. The Book I have is the second edition. The equations are listed in Appendix 3.

It is useful to go back to the definition of {hkl} and remember how angles between vectors are calculated.

With a tetragonal material and knowing the equation for cubic materials, it should come out that 'l' must be replaced by 'l*c/a' or 'l*a/c'.

HTH

Michael Dahms

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