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.

References in periodicals archive ?
The effect of pulp pH on the flotation recovery of chlorite and hematite was shown in Figure 2.
Mineral phases considered include halite [NaCl], anhydrite [CaS[O.sub.4]], calcite [CaC[O.sub.3]], and dolomite [CaMg[(C[O.sub.3]).sub.2]], together with the redox-buffering solids pyrite [Fe[S.sub.2]], biotite [K([Mg.sub.2]Fe)([Si.sub.3]Al)[O.sub.10][(OH).sub.2]], chlorite [[Mg.sub.2][Fe.sub.3][Al.sub.2][Si.sub.3][O.sub.10][(OH).sub.8]], and SOM (represented stoichiometrically as C[H.sub.2]O).
This fine-grained altered rock comprises three components: 1) the matrix is light green, clear, and isotropic to having low interference colour, possibly chlorite or chlorophaeite.
The expansion of illite and chlorite upon contacted with water was feeble, and kaolinite was not easily hydrated (Cui, D.
There is little difference in the clay mineralogy of the Bw and Bk(f) horizons, both being characterized by mixed-layer smectite (most likely probably illite-smectite and probably chloritesmectite), chlorite, illite, kaolinite and quartz.
Thus, the relationship given above can be generally applied to better distinguish the presence of certain types of chlorite minerals.
When the pH of the alkaline solution is 10 or 11, the reaction rate of quartz and montmorillonite rapidly increases, and even exceeds the reaction rate of kaolinite, while the reaction rate of illite and chlorite with the alkali solution is slow.
The XRD data and mineral analysis show that illitesmectite mixed-layer clays (average content is 16.61%) dominate the authigenic clays in the different reservoir samples, with minor chlorite (average content is 5.43%), illite (average content is 3.76%,) and kaolinite (average content is 2.33%).
The clay minerals are represented by illite, kaolinite, chlorite, smectite and relatively rare mixed-layer structure of chlorite-smectite (corrensite), which is identified for the first time in soils of the Czech Republic.
The 1.4-nm peak in HIV is often overlapped by peaks of other clay minerals such as vermiculite, chlorite, illite-smectite mixed clays and hydroxy-interlayered smectite (HIS) in X-ray diffraction, which makes the identification of HIV difficult in samples of polymineralic composition (Y in et al.
Non-metallic minerals are apatite, quartz, hornblende, actinolite, epidote, chlorite, Saussure, pomegranate.