chlorite

chlorite1
chloritic /klaw rit"ik, kloh-/, adj.
/klawr"uyt, klohr"-/, n.
a group of minerals, hydrous silicates of aluminum, ferrous iron, and magnesium, occurring in green platelike crystals or scales.
[1595-1605; CHLOR-1 + -ITE1]
chlorite2
/klawr"uyt, klohr"-/, n.
a salt of chlorous acid, as potassium chlorite, KClO2.
[1850-55; CHLOR-2 + -ITE1]

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Widespread group of layer silicate minerals composed of hydrous aluminum silicates, usually of magnesium and iron.

The name, from the Greek for "green," refers to chlorite's typical colour. Chlorites have a silicate layer structure similar to that in micas. They characteristically occur as alteration products of other higher temperature minerals and are most common in sedimentary and igneous rocks and in some metamorphic rocks.

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 widespread group of layer silicate minerals occurring in both macroscopic and clay-grade sizes; they are hydrous aluminum silicates, usually of magnesium and iron. The name, from the Greek for “green,” refers to chlorite's typical colour. Chlorites have a silicate layer structure similar to that in micas with compositions near (Mg,Fe,Al)3 (Si,Al)4O10(OH)2 and with brucitelike interlayers with compositions near (Mg,Fe,Al)3(OH)6. The overall composition is then (Mg,Fe,Al)6 (Si,Al)4O10(OH)8. The great many names found in older literature for chlorites with small variations of chemical composition are no longer used. The accepted names are: clinochlore (Mg-rich chlorite), chamosite (Fe-rich), nimite (Ni-rich), and pennantite (Mn-rich). Adjectival modifiers are used to indicate compositional variations. Cookeite (with lithium substituted for aluminum) is also a member of the chlorite group.

      Chlorites characteristically occur as alteration products of other minerals. They are common rock-forming minerals in clastic sediments and in hydrothermally altered igneous rocks; chlorites are widespread and important constituents of such metamorphic rocks as greenschists or chlorite schists. For detailed structure and physical properties, see clay mineral (table).

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Universalium. 2010.

Look at other dictionaries:

  • chlorite — [ klɔrit ] n. m. • 1831; de chlore ♦ Chim. Sel de l acide chloreux. Minér. Au plur. Famille de silicates naturels de fer et de magnésium, comprenant notamment la biotite. ● chlorite nom masculin Sel de l acide chloreux. ● chlorite nom féminin… …   Encyclopédie Universelle

  • Chlorite —   [k ] Plural,    1) Chemie: Chlorverbindungen.    2) Mineralogie: Sammelbezeichnung für eine zu den Tonmineralen gehörende Gruppe grünliche Schichtsilikatminerale mit sehr ähnlicher chemischer Zusammensetzung (magnesium und eisenhaltige… …   Universal-Lexikon

  • Chlorite — Chlo rite, n. [Gr. ? (sc. ?), fr. chlwro s light green.] (Min.) The name of a group of minerals, usually of a green color and micaceous to granular in structure. They are hydrous silicates of alumina, iron, and magnesia. [1913 Webster] {Chlorite… …   The Collaborative International Dictionary of English

  • Chlorite — Chlo rite, n. [Chlorous + ite.] (Chem.) Any salt of chlorous acid; as, chlorite of sodium. [1913 Webster] …   The Collaborative International Dictionary of English

  • Chlorite — Chlorite, wasserhaltige Magnesiatonerdesilikate, in denen MgO auch durch FeO, Al2O3 durch Fe2O3 vertreten sein kann. Sie sind sehr leicht spaltbar, beinahe wie Glimmer, aber die einzelnen Blättchen sind nicht so elastisch wie dieser. Die Farbe… …   Lexikon der gesamten Technik

  • Chlorite — Chlorīte, Salze der chlorigen Säure, s. Chlor …   Kleines Konversations-Lexikon

  • chlorite — chlorite1 [klôr′īt΄] n. a salt of chlorous acid containing the monovalent, negative radical ClO2 chlorite2 [klôr′īt΄] n. [L chloritis < Gr chlōritis < chlōros, pale green] any of a group of usually greenish, soft, monoclinic minerals,… …   English World dictionary

  • Chlorite — For the mineral type, see chlorite group. For the neutral chemical compound, see chlorine dioxide. The chlorite ion The chlorite ion is ClO2−. A chlorite (compound) is a compound that contains this group, with chlorine in oxidation state +3.… …   Wikipedia

  • Chlorite — Pour les articles homonymes, voir chlorite (homonymie). L anion chlorite Les ions chlorites (ClO2 …   Wikipédia en Français

  • Chlorite — Als Chlorite bezeichnet man in der Chemie die Salze der chlorigen Säure, siehe Chlorite (Stoffgruppe) in der Mineralogie kurz eine Gruppe chemisch ähnlicher Minerale, siehe Chloritgruppe Diese Seite ist eine Begriffsklärung zur Unt …   Deutsch Wikipedia

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