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Synthetic corundum as an X‐Ray monochromator
Author(s) -
Belt R. F.
Publication year - 1972
Publication title -
x‐ray spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.447
H-Index - 45
eISSN - 1097-4539
pISSN - 0049-8246
DOI - 10.1002/xrs.1300010205
Subject(s) - corundum , monochromator , topaz , diffractometer , crystal (programming language) , materials science , quartz , sapphire , intensity (physics) , analytical chemistry (journal) , mineralogy , optics , chemistry , crystallography , wavelength , crystal structure , optoelectronics , laser , metallurgy , physics , chromatography , computer science , programming language
Abstract Single crystal boules of hexagonal α‐AI 2 O 3 (corundum) were grown by the Czochralski method. The resulting size and crystal quality are appropriate for use as X‐ray monochromators. Eight corundum plates of various 2d spacings were fabricated and evaluated in both an X‐ray diffractometer and emission spectrometer. The corundum data were compared with crystals of ADP, Si, CaF 2 , Ge, NaCl, LiF, quartz and topaz. For X‐ray diffraction with Cu Kα the corundum (10 1 4) cut is of highest intensity. It is about equal to all other crystals except NaCl (200) and LiF (200). The latter have respectively about 4 and 9 times the corundum intensity. In emissior spectroscopy at wavelengths of 0.1 to 0.5 Å, the corundum (03 3 0) cut is superior to quartz (20 2 3) and topaz (303). The intensity is 2 to 4 times higher for corundum. High resolving power can be attained by the corundum (14 5 6) cut with 2d=1.660 Å. Data and applications are presented for this particularly useful crystal.