Crystal growth and crystallography

被引:56
作者
Chernov, AA
机构
[1] Univ Space Res Assoc, Alliance Micrograv Mat Sci & Applicat, Huntsville, AL 35805 USA
[2] Russian Acad Sci, Inst Crystallog, Div Elementary Proc Crystal Growth & Real Crystal, Moscow 117333, Russia
来源
ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES | 1998年 / 54卷
关键词
D O I
10.1107/S0108767398008587
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Selected topics that may be of interest for both crystal-structure and crystal-growth communities are overviewed. The growth of protein crystals, along with that of some other compounds, is one of the topics, and recent insights into related phenomena are considered as examples of applications of general principles. The relationship between crystal growth shape and structure is reviewed and an attempt to introduce semiquantitative characterization of binding for proteins is made. The concept of kinks for complex structures is briefly discussed. Even at sufficiently low supersaturations, the fluctuation of steps may not be sufficient to implement the Gibbs-Thomson law if the kink density is low enough. Subsurface ordering of liquids and growth of rough interfaces from melts is discussed. Crystals growing in microgravity from solution should be more perfect if they preferentially trap stress-inducing impurities, thus creating an impurity-depleted zone around themselves. Evidently, such a zone is developed only around the crystals growing in the absence of convection. Under terrestrial conditions, the self-purified depleted zone is destroyed by convection, the crystal traps more impurity and grows stressed. The stress relief causes mosaicity. In systems containing stress-inducing but poorly trapped impurities, the crystals grown in the absence of correction should be worse than those of their terrestrial counterparts.
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页码:859 / 872
页数:14
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