User:Christinaxlu/Assignment3
Draft of Assignment 3 - Add to an article
[edit]need to cite (Ch 9 pg. 156 of textbook)
Distribution (Partition) Coefficient
[edit]A distribution constant is used to define the relationship between the solid and liquid phase of a reaction. This equilibrium constant is often times referred to as when dealing with trace elements, where
for trace elements
The equilibrium constant is an empirically determined value. These values depend on temperature, pressure, and composition of the mineral melt. values differ considerably between major elements and trace elements. By definition, incompatible trace elements have an equilibrium constant value of less than one because trace elements have higher concentrations in the melt than solids. [1] Thus, this means that compatible elements have a value of .
Bulk Distribution Coefficient
[edit]The bulk distribution coefficient is used to calculate the elemental composition for any element that makes up a mineral in a rock. The bulk distribution coefficient, , is defined as the distribution coefficient for the element in mineral .[1]
where is the element of interest in the mineral, and is the weight fraction of mineral in the rock. is the distribution coefficient
- ^ a b McSween, Harry Y.,. Geochemistry : pathways and processes. Richardson, Steven McAfee., Uhle, Maria E., Richardson, Steven McAfee. (Second edition ed.). New York. ISBN 9780231509039. OCLC 61109090.
{{cite book}}
:|edition=
has extra text (help)CS1 maint: extra punctuation (link) CS1 maint: multiple names: authors list (link)