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单词 chlorite
释义
chlorite

Chemistry
  • 1. See chlorates.

    2. A group of layered silicate minerals, usually green or white in colour, that are similar to the micas in structure and crystallize in the monoclinic system. Chlorites are composed of complex silicates of aluminium, magnesium, and iron in combination with water, with the formula (Mg,Al,Fe)12(Si,Al)8O20(OH)16. They are most common in low-grade metamorphic rocks and also occur as secondary minerals in igneous rocks as alteration products of pyroxenes, amphiboles, and micas. The term is derived from chloros, the Greek word for green.


Geology and Earth Sciences
  • Important group of phyllosilicate (sheet silicate) minerals with the general composition (Mg,Fe,Al)6[(SiAl)4O10](OH)8 and related to the micas; sp. gr. 2.6–3.3; soft and green; platy or tabular habit; occur in low-grade metamorphic rocks of greenschist facies and as an alteration product of ferromagnesian minerals in igneous rocks. The group includes specific minerals, e.g. clinochlore, delessite, penninite, and thuringite. Chamosite and greenalite are septichlorites which are chemically similar to the chlorites.


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