exsolution

exsolution
/eks'seuh looh"sheuhn/, n.
Mineral. the process of exsolving.
[ < L exsolution- (s. of exsolutio). See EX-1, SOLUTION]

* * *

      in mineralogy, process through which an initially homogeneous solid solution separates into at least two different crystalline minerals without the addition or removal of any materials. In most cases, it occurs upon cooling below the temperature of mutual solubility or stability of the solution. The sodium-rich feldspar albite (NaAlSi3O8) and the potassium-rich feldspar orthoclase (KAlSi3O8), for example, may exist in a homogeneous solid solution above 650° C (1,200° F), but below that temperature exsolution will occur.

* * *


Universalium. 2010.

Игры ⚽ Нужна курсовая?

Look at other dictionaries:

  • Exsolution — Ex so*lu tion, n. [L. exsolutio a release.] Relaxation. [R.] Richardson (Dict. ). [1913 Webster] …   The Collaborative International Dictionary of English

  • exsolution — |ek(s)+ noun Etymology: Latin exsolution , exsolutio release, from exsolutus (past participle of exsolvere) + ion , io ion : the action or process of exsolving …   Useful english dictionary

  • exsolution — noun Date: 1921 the process of separating or precipitating from a solid crystalline phase …   New Collegiate Dictionary

  • exsolution — noun The process in which a solution of molten rocks separate into its constituents upon cooling …   Wiktionary

  • exsolution — ex·solution …   English syllables

  • pyroxene — pyroxenic /puy rok sen ik/, adj. /puy rok seen, peuh , puy rok seen /, n. any of a very common group of minerals of many varieties, silicates of magnesium, iron, calcium, and other elements, occurring as important constituents of many kinds of… …   Universalium

  • Solid solution — Fig. 1 A binary phase diagram displaying solid solutions over the full range of relative concentrations. A solid solution is a solid state solution of one or more solutes in a solvent. Such a mixture is considered a solution rather than a… …   Wikipedia

  • Rock microstructure — includes the texture of a rock and the small scale rock structures. The words texture and microstructure are interchangeable, with the latter preferred in modern geological literature. However, texture is still acceptable because it is a useful… …   Wikipedia

  • MINÉRALOGIE — La minéralogie a pour but l’étude des minéraux, éléments ou composés naturels. Si la notion d’espèce minérale a longtemps varié, depuis quelques décennies les minéralogistes en donnent la définition suivante: un minéral est un solide naturel,… …   Encyclopédie Universelle

  • Myrmekite — describes a vermicular, or wormy, intergrowth of quartz in plagioclase. The intergrowths are microscopic in scale, typically with maximum dimensions less than 1 millimeter. The plagioclase is sodium rich, usually albite or oligoclase. These… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”