Nontronite


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Related to Nontronite: saponite, Palygorskite

Non´tro`nite


n.1.(Min.) A greenish yellow or green mineral, consisting chiefly of the hydrous silicate of iron.
References in periodicals archive ?
Crystalline forms are also attacked, as gibbsite and nontronite release substantial proportions of Al, and illite of Fe (Biermans and Baert 1977).
The identification and quantification of the clay minerals is important, in particular the ones responsible for the susceptibility of the soils to produce expansion and contraction of such soils, such as smectites (saponite), montmorillonite, nontronite, hectorite, and beidelite [3, 9].
Smectite is the name used for a group of phyllosilicate mineral species, the most important of which are montmorillonite, beidellite, nontronite, saponite, and hectorite [4].
The Gaussian-Lorentz model was developed and validated by empirical studies of isolated vibration absorption bands in both transmission and reflectance spectra of autunite, nontronite, and smectite [25,26].
(2011), with crystallisation of glauconite and nontronite generated from hydrothermal fluids mixed with seawater in hydrothermal mounds near the Galapagos Spreading Center.
The microbial reduction of structural [Fe.sup.3+] in nontronite by thermophilic bacterium Thermoanaerobacter ethanolicus and its role in promoting the smectite to illite reaction was investigated by Gengxing Zhang et al (2009).
After the analyses, the soil minerals found were: quartz, calcite, sanidine, albite, nontronite, muscovite, montmorillonite, hematite, faujasite, dolomite, microcline, anorthite, anorthoclase, clinochlore and epidote.
That picture changed when a young JPL spectroscopist, Ralph Milliken, found evidence in MRO data for a clay mineral called nontronite in Gale.
They are associated with other secondary minerals such as amorphous silica, calcite and nontronite Amygdales have a spheroid, ellipsoidal or irregular shape; they usually appear in separate units but locally coalesce with each other (Figures 4a-4b).
The uncured composition of claim 1, wherein the layered filler comprises at least one silicate selected from montmorillonite, nontronite, beidellite, bentonite, volkonskoite, laponite, hectorite, saponite, sauconite, magadite, kenyaite, stevensite, vermiculite, halloysite, aluminate oxides, hydrotalcite and mixtures thereof.
Bentonites are sedimentary rocks consisting clay minerals, such as montmorillonite (major constituent), beidellite, saponite, nontronite, hectorite, and nonclay minerals (3).