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The effect of metallic ions on tapering phenomenon of DKDP crystals and its elimination
Author(s) -
Li Guohui,
He Youping,
Su Genbo,
Zhuang Xinxin,
Lin Xiuqin,
Li Zhengdong
Publication year - 2007
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.200610829
Subject(s) - tapering , crystal (programming language) , chemistry , metal , wedge (geometry) , impurity , ion , materials science , optics , physics , computer graphics (images) , organic chemistry , computer science , programming language
The anomalous wedge‐like shape of KH 2 PO 4 ‐type single crystal, also called tapering, is discussed in this paper. DKDP single crystals grew on seeds from the solutions containing high concentrations of Al 3+ , Fe 3+ and Cr 3+ impurities. The tapering phenomenon occurred on the prismatic {010} faces, and the tapering angle θ was nearly measured as 10°. We adjusted the pD value of the solution from 3.0 to 4.2 by adding K 2 CO 3 , the tapering angle of DKDP crystal grown from the same solution at same supercooling was reduced to 0°. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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