Abstract

The paper presents author’s original and literature data on the standard free energy of 31 Sc ions and complexes in aqueous solution. Scandium behavior at the weathering of phyllite shales is physicochemically simulated with the Selector program package. The content of Sc in the shales is close to its average content in the Earth’s crust: 10^–3 wt %. Solution in the weathering profile was determined to contain Sc practically only in the form of the hydroxocomplex \({\text{Sc}}({\text{OH}})_{3}^{0}.\) The dissolved Sc concentrations is controlled by the solubility of its oxide Sc₂O₃ and phosphate ScPO₄ and is lower than 10^–9 mol/L.

中文翻译：

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风化曲线中ing行为的物理化学模型

摘要

本文介绍了关于水溶液中31 Sc离子和配合物的标准自由能的原始和文献数据。使用Selector程序包对叶蜡石页岩风化时的dium行为进行了物理化学模拟。页岩中Sc的含量接近其在地壳中的平均含量：10 ^–3 wt％。确定风化剖面中的溶液实际上仅以羟基复合物\（{\ text {Sc}}（{\ text {OH}}）_ {3} ^ {0}。\}的形式包含Sc。其浓度受其氧化物Sc ₂ O ₃和磷酸盐ScPO ₄的溶解度控制，且低于10 ^–9 mol / L。