allomerous

adjective

pertaining to allomerism

• Pertains to noun: ↑allomerism

• Derivationally related forms: ↑allomerism

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adjective

see allomerism

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allomerous, a.

(æˈlɒmərəs)

[f. as prec. + -ous.]

Liable to variation in constituent elements or as to the proportion in which these are present, without change in crystalline form.

Allomerous is (to some extent) the correlative of isomorphous; hornblende, tremolite, and edenite are isomorphous minerals, being varieties of the allomerous amphibole (see prec.); but distinct minerals are also isomorphous, as gold, platinum, and zinc; phosphate of lime (apatite) and phosphate of lead (pyromorphite); sesquioxide of iron and sesquioxide of manganese; which are not varieties of a single allomerous substance, though, as in the case of the two last mentioned, they may appear as isomorphous constituents of an allomerous compound mineral like amphibole or pyroxene.