Johannson crystal geometry

Johannson crystal geometry

[jō′han·sən ¦krist·əl jē′äm·ə·trē]
(crystallography)
The full-focusing shape of a diffracting crystal for x-ray dispersion used in electron-probe microanalyzers; more stringent than Johann crystal geometry.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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