Saponite


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Related to Saponite: Nontronite

saponite

[′sap·ə‚nīt]
(mineralogy)
A soft, soapy, white or light-buff to bluish or reddish trioctahedral montmorillonitic clay mineral consisting of hydrous magnesium aluminosilicate and occurring in masses in serpentine and basaltic rocks. Also known as bowlingite; mountain soap; piotine; soapstone.

Saponite

 

a mineral, a phyllosilicate of the montmorillonite group; it has the chemical formula NaMg3[AlSi3O10]-(OH)2•4H20. Saponite contains Fe as an isomorphic admixture and, sometimes, Cr, Ni, Zn, Cu, and Li. It crystallizes in the monoclinic system. It is found in earthy, clayey or dense, cryptocrystalline masses. When wet, the deposits are soft and oily to the touch; when dry, they are hard and friable. The color is white, yellowish, or reddish. Dry saponite has a hardness of 2.5 on Mohs’ scale, and its density ranges from 2,240 to 2,300 kg/m3. Saponite is formed during the erosion of magnesium minerals of ultrabasic rocks (serpentinites). It has the properties of bentonites (see alsoBLEACHING CLAYS).,

References in periodicals archive ?
Porous oncolitic limestone shows the effects of circulating hydrothermal fluids up to 20 m away from the contact, with increasing contents in dolomite, amorphous silica and saponite. Yet relatively impervious marly intervals exhibit no significant mineralogical changes except for the substitution of calcite by dolomite.
Acid activation of a ferrous saponite (griffithite): Physicochemical characterization and surface area of the products obtained.
Mt, saponite, hectorite, and synthetic mica were used to synthesize clay mineral-nylon-6 hybrid materials.
Le seul changement architectural important coincide avec l'arrivee du peuple du Dorset tardif ayant mis en valeur des couloirs triangulaires distinctifs et des supports a lampes en saponite.
Moreover, the study explains that talc is present in close proximity to the carbonate locations - rather than previously suggested saponite - and talc-carbonate alteration of high-Mg precursor rocks has taken place.
These minerals include both natural clays(e.g., MMT, hectorite, and saponite) and synthesized clays (e.g., fluorohectorite, laponite, and magadiite) while MMT and hectorite are the most widely used.
Among the new entries are aluminum hydroxide adjuvant, disodium edetate, ethyl lactate, hectorite, lactose spray dried, lauric acid, linoleic acid, raffinose, and saponite. The entries, which are organized alphabetically, each contain a list of nonproprietary names and synonyms; detailed chemical information, including the structural formula; a description; applications; method of manufacture; handling precautions; regulatory status; and related substances, among other information.
Saponite ([Ca.sub.0.5]Na)[.sub.0.3](Mg,[Fe.sup.2+])[.sub.3](Si,Al)[.sub.4][O.sub.10](OH)[.sub.2]*4[H.sub.2]O
The succession gismondine--clay mineral (probably saponite pseudomorphism) was detected together with Ba-bearing phillipsite-Ca and clay mineral overgrowths.
Where were they gone, the larders you used to have beneath the window ledge, the packets of Saponite" (61).
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].