hydromica
Mica Mi"ca, n. [L. mica crumb, grain, particle; cf. F. mica.] (Min.) The name of a group of minerals characterized by highly perfect cleavage, so that they readily separate into very thin leaves, more or less elastic. They differ widely in composition, and vary in color from pale brown or yellow to green or black. The transparent forms are used in lanterns, the doors of stoves, etc., being popularly called {isinglass}. Formerly called also {cat-silver}, and {glimmer}. [1913 Webster]

Note: The important species of the mica group are: {muscovite}, common or potash mica, pale brown or green, often silvery, including {damourite} (also called {hydromica} and {muscovy glass}); {biotite}, iron-magnesia mica, dark brown, green, or black; {lepidomelane}, iron, mica, black; {phlogopite}, magnesia mica, colorless, yellow, brown; {lepidolite}, lithia mica, rose-red, lilac. [1913 Webster] Mica (usually muscovite, also biotite) is an essential constituent of granite, gneiss, and mica slate; {biotite} is common in many eruptive rocks; {phlogopite} in crystalline limestone and serpentine. [1913 Webster]

{Mica diorite} (Min.), an eruptive rock allied to diorite but containing mica (biotite) instead of hornblende.

{Mica powder}, a kind of dynamite containing fine scales of mica.

{Mica schist}, {Mica slate} (Geol.), a schistose rock, consisting of mica and quartz with, usually, some feldspar. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Hydromica — Hy dro*mi ca, n. [Hydro , 1 + mica.] (Min.) A variety of potash mica containing water. It is less elastic than ordinary muscovite. [1913 Webster] {Hydromica schist} (Min.), a mica schist characterized by the presence of hydromica. It often has a… …   The Collaborative International Dictionary of English

  • hydromica — ● hydromica nom masculin Synonyme de illite. ● hydromica (synonymes) nom masculin Synonymes : illite …   Encyclopédie Universelle

  • hydromica — noun An alternate name for illite …   Wiktionary

  • hydromica — hy·dro·mica …   English syllables

  • hydromica — …   Useful english dictionary

  • Hydromica schist — Hydromica Hy dro*mi ca, n. [Hydro , 1 + mica.] (Min.) A variety of potash mica containing water. It is less elastic than ordinary muscovite. [1913 Webster] {Hydromica schist} (Min.), a mica schist characterized by the presence of hydromica. It… …   The Collaborative International Dictionary of English

  • Hydromica Schist — is a form of Schist containing hydromica which is itself a hydrated form of Mica, particularly potassium rich Muscovite. The schist usually has a silky lustre and may feel soapy …   Wikipedia

  • biotite — Mica Mi ca, n. [L. mica crumb, grain, particle; cf. F. mica.] (Min.) The name of a group of minerals characterized by highly perfect cleavage, so that they readily separate into very thin leaves, more or less elastic. They differ widely in… …   The Collaborative International Dictionary of English

  • biotite — Mica Mi ca, n. [L. mica crumb, grain, particle; cf. F. mica.] (Min.) The name of a group of minerals characterized by highly perfect cleavage, so that they readily separate into very thin leaves, more or less elastic. They differ widely in… …   The Collaborative International Dictionary of English

  • cat-silver — Mica Mi ca, n. [L. mica crumb, grain, particle; cf. F. mica.] (Min.) The name of a group of minerals characterized by highly perfect cleavage, so that they readily separate into very thin leaves, more or less elastic. They differ widely in… …   The Collaborative International Dictionary of English

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