Chlorite

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chlorite

[′klȯr‚īt]
(inorganic chemistry)
A salt of chlorous acid.
(mineralogy)
Any of a group of greenish, platyhydrous monoclinic silicates of aluminum, ferrous iron, and magnesium which are closely associated with and resemble the micas.

Chlorite

 

a salt of chlorous acid, HClO2. Chlorites are formed in the reaction of chlorine dioxide and alkaline solutions in the presence of H2O2 or reducing agents; for example,

2ClO2 + 2NaOH + H2O2 = 2NaClO2 + 2H2O + O2

In acidic media, chlorites are good oxidizing agents; in the solid state, they explode upon impact or upon heating, as well as in the presence of readily oxidizable impurities.

Of all the chlorites, sodium chlorite has found use. It is obtained as colorless crystals, whose solubility in water is 31.1 percent at 0°C, 50.7 percent at 37.4°C, and 56.3 percent at 70°C. Below 37.4°C, it forms the crystal hydrate NaClO2 · 3H2O. Above 100°C, it begins to decompose, forming sodium chlorate and sodium chloride. Upon reaction with chlorine, it forms ClO2 and NaCl. Sodium chlorite is used in the form of aqueous solutions for the mild bleaching of fabrics (mainly linens) and paper, for water decontamination, and, in small amounts, for the production of ClO2.

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11) via listric detachment faults, with brittle-ductile transitions on the footwall from chloritic breccia to semi-ductile mylonite, fanning dips in syn-extensional upper-plate conglomerate units, domino-style upper-plate faults, and consistent angles of 50-70 degrees between detachments and bedding in conglomerate units (Seranne and Seguret 1987; Howard and John 1987; Lister and Davis 1989; Spencer and Reynolds 1989, 1991; Dickinson 1991).
A lower carboniferous two-stage extensional basin along the Avalon-Meguma terrane boundary: evidence from southeastern Isle Madame, Nova Scotia
These anomalously older ages maybe related to one or both of: (1) recoil effects due to the presence of K-free chloritic phases in the altered samples that are synchronous with zeolite formation (Kontak 2000), or (2) incorporation of excess argon during post-eruptive alteration attending zeolite formation.
[sup.40]Ar/[sup.39]Ar age of the Jurassic North Mountain Basalt, southwestern Nova Scotia
A 2 X 3 X 4-meter zone in the lower workings has produced the blocky tabular crystals for which the locality is famous, as well as unusual crystals elongated on the a axis, with {001} and {102} termination faces; slender twinned prisms with "feathered" terminations; highly elongated prismatic crystals measuring to 8 cm with "stepped" terminations and associated with chloritic and byssolitic quartz; flattened and slightly curved, smaller crystals nearly identical to those found in Copper Mountain's Jumbo #4 mine; one or two black, nearly opaque, flat, dime-sized, pseudo-hexagonal tablets; and unusual fans and aggregated fans of bi-colored "jackstraw" crystals, some of which penetrate, or are penetrated by, single prismatic crystals and crystal clusters of heavily included quartz.
Famous mineral localities: Green Monster Mountain, Prince of Wales Island, Alaska
Footwall rocks (Cambrian): The footwall consists of pegmatite and calc-silicate gneiss overlain by a few thrust outliers of mica schist or aluminosilicate formations in contact with the chloritic mineralization.
The Trimouns quarry: Luzenac, Ariege, France
The gold-bearing, low sulfide, quartz vein systems are hosted in graphitic, chloritic and sericitic schists.
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Andreas also showed me a gorgeous deep yellow-green chloritic fishtail titanite 5 cm long, which at first I assumed to be from Pakistan or perhaps from some remarkably beneficent Alp, but no, it is so far the only piece taken from a locality to watch for: Gamsberg.
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4 meters true width) and is comprised of 70% pyrite, 20% chalcopyrite, 5% sphalerite and chloritic host rock and quartz.
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68 g/t gold, while sheared, chloritic schist from the shaft dump returned 0.
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0 metres) from a mafic volcanic - chloritic greenstone contact.
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The mineralization is strongly related to hydrothermal alteration of a schist-biotite-quartz-sericite horizon, hosted between metapellites and chloritic meta-tuffs, and, secondarily, by hydrothermal alteration of layers of the Archean banded iron formation (BIF) that characterizes the main mineralization of the Iron Quadrangle region.
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Gold deposits in the area are associated with sulfide replacement of carbonate facies banded ironstone formation (BIF) within a sequence of chloritic and carbonaceous schists.
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Mineralization is associated with disseminated sulfides and quartz pyrite veining in chloritic and argillically altered andesite.
Eldorado Resumes Work On Kisladag Discovery

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