Also found in: Encyclopedia, Wikipedia.
Related to Nontronite: saponite, Palygorskite


n.1.(Min.) A greenish yellow or green mineral, consisting chiefly of the hydrous silicate of iron.
References in periodicals archive ?
2011), with crystallisation of glauconite and nontronite generated from hydrothermal fluids mixed with seawater in hydrothermal mounds near the Galapagos Spreading Center.
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).
Analysis revealed that it consisted of kaolinite, dickite (a closely related clay mineral to kaolinite), nontronite, (a smectite, similar to bentonite, where iron replaces alumina in the crystal lattice), the remainder being quartz.
Higher grade limonite acid pressure leaching with particular reference to the Calliope project in New Caledonia has been discussed by Russel(17) and contrasted to the lower grade nontronite clays at Murrin Murrin.
The research has been focused on the basic clay mineral specimens (kaolinite, montmorillonite, nontronite, illite, chlorite and vermiculite) including micas (muscovite, biotite) and the associated minerals (quartz, feldspar, carbonates and sulphates).
1942) books"; schorl of "tremendous size"; nontronite Davib mine Schorl; green elbaite Frommurze et al.