incongruent melting

      liquefaction of a solid accompanied by decomposition or by reaction with the melt to produce another solid and a liquid that differs in composition from the original solid. For example, enstatite, a magnesium silicate (MgSiO3), melts incongruently at low pressures to form forsterite, which is another magnesium silicate (Mg2SiO4), and a liquid enriched in silica (SiO2). At pressures between 2.5 and 5.5 kilobars, the melting of enstatite is congruent.

* * *


Universalium. 2010.

Look at other dictionaries:

  • Incongruent melting — occurs when a substance does not melt uniformly and decomposes into another substance. For example, potassium feldspar (KAlSi3O8) decomposes to leucite (KAlSi2O6) when it melts. The decomposition is not complete, however. Most of the feldspar… …   Wikipedia

  • incongruent melting — inkongruentinis lydumas statusas T sritis chemija apibrėžtis Junginio savybė skilti lydymosi metu. atitikmenys: angl. incongruent melting rus. инконгруэнтная плавкость …   Chemijos terminų aiškinamasis žodynas

  • Incongruent transition — Incongruent transition, in chemistry, is a mass transition between two phases which involves a change in composition. This is contrasted with congruent transition, for which the composition remains the same. The transition may be that of melting …   Wikipedia

  • incongruent — [ɪn kɒŋgrʊənt] adjective 1》 incongruous. 2》 Chemistry affecting the components of an alloy or other substance differently: incongruent melting. Derivatives incongruence noun incongruently adverb …   English new terms dictionary

  • Congruent melting — occurs during melting of a compound when the composition of the liquid that forms is the same as the composition of the solid. It can be contrasted with incongruent melting. The congruent melting point is the melting point (the pressure and… …   Wikipedia

  • igneous rock — Any of various crystalline or glassy, noncrystalline rocks formed by the cooling and solidification of molten earth material (magma). Igneous rocks comprise one of the three principal classes of rocks, the others being metamorphic and sedimentary …   Universalium

  • Leucogranite — In geology, leucogranites are amongst the youngest intrusions related to anatexis of continental crust anywhere in the world. Leucogranites are commonly found in deformed metapelitic/metagraywacke sequences that have been thrusted over basements… …   Wikipedia

  • Phase diagram — In physical chemistry, mineralogy, and materials science, a phase diagram is a type of graph used to show the equilibrium conditions between the thermodynamically distinct phases. In mathematics and physics, a phase diagram also has an… …   Wikipedia

  • Solvus — In a physical or geochemical system, a solvus is a line (binary system) or surface (ternary system) on a phase diagram which separates a homogeneous solid solution from a field of several phases which may form by exsolution or incongruent melting …   Wikipedia

  • inkongruentinis lydumas — statusas T sritis chemija apibrėžtis Junginio savybė skilti lydymosi metu. atitikmenys: angl. incongruent melting rus. инконгруэнтная плавкость …   Chemijos terminų aiškinamasis žodynas

Share the article and excerpts

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

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.