“Goldschmidt’s rules”的概念、定义、翻译、参考文献-科学参考

Goldschmidt’s rules

Chemistry

A set of rules for describing isomorphous substitution in minerals that was proposed by the Swiss-born Norwegian geochemist Victor Moritz Goldschmidt (1888–1947) in 1926. These rules state that: (1) the size of the ion that substitutes for the original ion should not differ from it by more than 15%; (2) the charge of the substituting ion and the original ion can only differ by one, with there being overall charge neutrality for the structure; (3) for two competing substituting ions, the one with the higher charge to ionic radius ratio is preferred; and (4) the electronegativity of the substituting and original ions should not differ too much. See also Hume-Rothery rules.

Geology and Earth Sciences

In a system where the two variables, temperature and pressure, are controlled externally, the number of phases will not usually exceed the number of components. In geology the maximum number of naturally occurring minerals in a rock is equal to the number of components where a given mineral assemblage is stable over a range of temperatures and pressures.

单词	Goldschmidt’s rules
释义	Goldschmidt’s rules Chemistry A set of rules for describing isomorphous substitution in minerals that was proposed by the Swiss-born Norwegian geochemist Victor Moritz Goldschmidt (1888–1947) in 1926. These rules state that: (1) the size of the ion that substitutes for the original ion should not differ from it by more than 15%; (2) the charge of the substituting ion and the original ion can only differ by one, with there being overall charge neutrality for the structure; (3) for two competing substituting ions, the one with the higher charge to ionic radius ratio is preferred; and (4) the electronegativity of the substituting and original ions should not differ too much. See also Hume-Rothery rules. Geology and Earth Sciences In a system where the two variables, temperature and pressure, are controlled externally, the number of phases will not usually exceed the number of components. In geology the maximum number of naturally occurring minerals in a rock is equal to the number of components where a given mineral assemblage is stable over a range of temperatures and pressures.
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