exsolvev.
/ɛkˈsɒlv/ Geology.
a. transitive. To form by exsolution.
ΚΠ
1951 Jrnl. Geol. (Chicago) 59 482/1 In volcanic rocks pigeonite is preserved by quenching as a metastable phase. In plutonic rock it exsolves augite plates parallel to the (001) plane.
1966 Jrnl. Petrol. 7 454 Natural ‘anomalous bornites’..when heated exsolve chalcopyrite and, depending on their composition, also digenite.
1980 Sci. Amer. Feb. 86/1 The ring fractures could propagate downward,..reducing the pressure of the magma so that the dissolved gases would be exsolved.
b. intransitive. To separate out by exsolution.
ΚΠ
1942 Econ. Geol. 37 348 Solid solutions of each in the other exist above 475°C. and exsolve on cooling.
1979 Nature 3 May 33/1 The amount of water actually exsolving seemed to be insufficient.
1988 Nature 4 Feb. 408/1 At the still lower sub-solidus temperature of ≲870 K, the homogeneous alloys exsolved into immiscible metallic phases.
Derivatives
exˈsolved adj. formed by exsolution.
ΚΠ
1951 Jrnl. Geol. (Chicago) 59 482/1 Orthopyroxene..retains the exsolved lamellae on the now relict (001) plane.
1976 Nature 5 Feb. 387/2 Todorokite..readily oxidises and dehydrates to yield minute platelets of δ–MnO2 admixed with a separate exsolved FeOOH.nH2O phase.
This entry has not yet been fully updated (first published 1993; most recently modified version published online September 2018).
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