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Related to chamosite: clinochlore
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  • noun

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a greenish grey or black silicate of iron and aluminum

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References in periodicals archive ?
Frost, "Thermal decomposition of ferrian chamosite: an infrared emission spectroscopic study," Contributions to Mineralogy and Petrology, vol.
Key words: Mineralogical, petrographical, lithofacies, Salt Range, Permian, Cretaceous, kaolinite, goethite, boehmite, gibbsite, dickite, glauconite, chamosite, chlorite, nacrite, micrite, microclasts.
X-ray diffraction analysis shows the presence of kaolinite, gibbsite, boehmite, dickite, chamosite and anatase.
The dark green coloured chamosite ranges from 0.1 to 0.2 mm in size.
Chamosite forms as platy dark green to black microcrystals inside breccia cavities.
Mineralogists of the 19th century were much more successful in the description of new layer hydrosilicates: allophane, amesite, antigorite, aspidolite, batavite, biotite /a series name/, celadonite, chamosite, chrysotile /a series name/, clinochlore, corundophyllite, cronstedtite, delessite, diabantite, ephesite, glauconite /a series name/, halloysite, kaolinite, muscovite, nacrite /a polytype/, nontronite, palygorskite, paragonite, penninite /or pennine/, phengite /a series name/, phlogopite, polylithionite, pyrophyllite, ripidolite, roscoelite, saponite, sauconite, sepiolite, serpentine, siderophyllite, stevensite, tainiolite, thuringite, vermiculite /trioctahedral and dioctahedral, distinguished in the 20th century/, volkonskoite, zinnwaldite /a series name/.
The first is chamosite, a high-Fe member of the chlorite group.
Interesting specimens of calcite, fluorite colored by dysprosium, chamosite, kainosite-(Y) and other minerals have been found in fresh roadcuts along New York State Route 30.
The mineral assemblage of the Long Lake veins is a hydrothermal suite dominated by calcite and fluorite, but including chamosite, hematite, pyrite, quartz, cerian epidote and the rare mineral kainosite-(Y).
Calcite-I, which was the first mineral to crystallize (with the exception of a thin layer of chamosite which often coats the vein walls), forms rhombohedral crystals, usually twinned on {00011}.
Chlorite from Dodo varies chemically from an iron-rich clinochlore to chamosite, and is one of the most widespread mineral groups in the alpine-type Dodo clefts.
X-ray patterns obtained from these spheroidal aggregates show them to be members of the chlorite group, and their EDS spectra indicate they are predominantly Mg-Fe aluminosilicates, suggesting they are most likely intermediate in composition between clinochlore and chamosite.
Pale blue to purplish gray octahedral fluorite crystals up to 2 cm associated with calcite, and often coated with acicular microcrystals of epidote, chamosite and rare kainosite-(Y), have been collected.