Effect of crystal composition and growth rate on sector zoning in solid solutions grown from aqueous solutions
Effect of crystal composition and growth rate on sector zoning in solid solutions grown from aqueous solutions
复制标题
晶体组成和生长速率对水溶液生长固溶体扇形分区的影响
DOI：
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发表时间：
2009
影响因子：
2.7
通讯作者：
O. I. Artamonova
中科院分区：
文献类型：
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作者：
A. Shtukenberg;Y. O. Punin;O. I. Artamonova
本文研究了Tutton盐(NH_4)_2M(SO_4)_2·−_6H_2O(M=Co，Ni，Zn，Mg)和二价金属Me(NO_3)_2(Me=Sr，Pb，Ba)固溶体在控制条件下的扇形分带。从实验和理论上研究了晶体组成和生长速率(过饱和度)对“固溶体−水溶液”体系中晶化过程中同象组份浓度差异的影响。计算表明，选择性吸附现象在扇形带状晶体的形成中起主要作用，生长动力学的贡献通常很小，但有时很大。
Abstract Sector zoning in solid solutions of Tutton′s salts (NH4)2M(SO4)2−6H2O (M = Co, Ni, Zn, Mg) and nitrates of divalent metals Me(NO3)2 (Me = Sr, Pb, Ba) grown from low-T aqueous solutions under controlled conditions is studied. The effect of crystal composition and growth rate (supersaturation) on the intersector difference in concentrations of isomorphic components is examined experimentally and modelled theoretically based on the phenomenological approach to crystallization in a ‘solid solution−aqueous solution’ system. Calculations show a predominating contribution of the selective adsorption phenomena in the formation of a sector-zoned crystal with usually minor, but sometimes a major contribution of growth kinetics.