Smectite stone chemical composition

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  • OBORTS Company, Opposite the residence of old General Mambou, Near Dragage, Bastos, Yaoundé, Cameroon
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  • Smectite clay Minerals: Properties and Uses

    Crystal structure and chemical composition The smectite clay minerals have a layer lattice structure similar to micas, but they differ from micas in that the bonds between layers are weakened because of internal chemical sub-

  • Clay mineral rock Britannica

    These minerals can be classified on the basis of variations of chemical composition and atomic structure into nine groups: (1) kaolin-serpentine (kaolinite, halloysite, lizardite, chrysotile), (2) pyrophyllite-talc, (3) mica (illite, glauconite, celadonite), (4) vermiculite, (5) smectite (montmorillonite, nontronite, saponite), (6) chlorite

  • Smectite clay Minerals: Properties and Uses

    The members of the smectite group of clays are distinguished by the species and location of cations in the tetrahedral and octahedral sites. Table 1 shows the currently accepted classi-fication of smectite clay minerals and gives idealized structural formulas. This classification is based on both crystalline structure and chemical composition.

  • Hectorite Mineral Data

    General Hectorite Information : Chemical Formula: Na0,3(Mg,Li)3Si4O10(OH)2 : Composition: Molecular Weight = 383.25 gm Sodium 2.40 % Na 3.23 % Na 2 O: Lithium 0.54 % Li 1.17 % Li 2 O: Magnesium 17.12 % Mg 28.39 % MgO: Silicon 29.31 % Si 62.71 % SiO 2: Hydrogen 0.53 % H 4.70 % H 2 O: Oxygen 50.10 % O: 100.00 % 100.21 % = TOTAL OXIDE

  • Characterization of mixed-layer illite-smectite from

    Characterization of mixed-layer illite-smectite from bentonites using microscopic, chemical, and X-ray methods: Constraints on the smectite-to-illite stone and shale studied by Pollastro (1985) and a hydro-thermal system studied by Amouric and Olives (1991), chemical composition, and oxygen isotopic composition as illitization proceeds

  • 20. MINERALOGY AND CHEMICAL COMPOSITION OF CLAY …

    20. MINERALOGY AND CHEMICAL COMPOSITION OF CLAY MINERALS, TAG HYDROTHERMAL MOUND1 Anne Sturz,2 Mika Itoh,2 and Susan Smith3 ABSTRACT Herein we present preliminary results of a study of the distribution and chemical composition of clay minerals in rocks recovered from the Trans-Atlantic Geotraverse (TAG) hydrothermal mound.

  • Clay mineral - Wikipedia

    In 2013, analytical tests by the Curiosity rover found results consistent with the presence of smectite clay minerals on the planet Mars. Illite group which includes the clay-micas. Illite is the only common mineral. Chlorite group includes a wide variety of similar minerals with considerable chemical variation.

  • CHEMICAL CHARACTERISTICS AND ORIGIN OF ORDOVICIAN …

    The composition and ordered stacking in K-bentonites was determined by the composition of the original smectite rather than by the pressure-temperature conditions of burial diagenesis. Key Words--Bentonite, Chemical composition, lllite/smectite, Interstratification, K-bentonite, Rectorite. INTRODUCTION

  • Understanding of Long-Term CO2-Brine-Rock Geochemical

    Jul 15, 2019· Similarly, smectite is treated as a 1 : 1 mixture of smectite-Na and smectite-Ca (detailed in Table 3). The measured native formation water chemical composition, taken from Ren et al. , is used during the initialization of the simulations.

  • Variations in Chemical Composition of Clay Minerals and

    abundance and chemical composition of hydrothermal minerals and magnetic susceptibility of the hydrother- stone that is classifi ed as wacke ( Teraoka, 2004 ). smectite; and zone IV, which is defi ned by the common presence of chlorite and illite ( Fig. 1 ).

  • KIDNEY STONE TYPES Kidney Stone Evaluation And Treatment

    The names, matter because the whole science of stone prevention focuses upon stone crystals. Each kidney stone crystal creates its own unique illness and requires specific treatment. That is why we name stones by the names of their crystals and why when stones are analysed the results are reported by these very same names.

  • (PDF) Smectite clay identification and quantification as

    Fig. 5 a % Smectite identified in whole rock; b % smectite after corrections for clay fraction analyses (where applicable) Fig. 6 Comparison of major mineralogy composition as determined

  • Soil Smectite – Virtual Museum of Molecules and Minerals

    Specific minerals included in the smectite family are montmorillonite, beidellite, saponite, nontronite, and several less common species. Smectites are constructed of a single octahedral sheet sandwiched between two tetrahedral sheets, with the octahedral sheet sharing the apical oxygens of …

  • Smectite clay Minerals: Properties and Uses - NASA/ADS

    The physicochemical properties of smectite clay minerals that determine their industrial utilization are reviewed. Smectite is the name used for a group of phyllosilicate mineral species, the most important of which are montmorillonite, beidellite, nontronite, saponite and hectorite. These and several other less common species are differentiated by variations in chemical composition involving

  • 6 Main Types of Clay Minerals - Soil Management India

    ADVERTISEMENTS: This article throws light upon the six main types of clay minerals. The types are: 1. Kaolinite 2. Smectite Group 3. Illite Group 4. Vermiculite 5. Chlorite 6. Allophanes. Type # 1. Kaolinite: The most prominent member of the 1: 1 type of clay minerals is kaolinite, in …

  • Paleoenvironmental reconstruction from chemical and

    smectite) (Lawrence and Taylor, 1971, 1972) and coexisting pedogenic carbonates (Stern et al., 1997) have been shown to precipitate in isotopic equilibrium with the soil water in which they form and thus to record the 18O composition of soil water. Studies have suggested that the 18O composition of these pedogenic minerals can be related to the

  • The Chemical Composition of Gems & Minerals

    The chemical properties of minerals mainly reflect the chemical properties of the atoms present in each. However, even here these properties depend on the way the atoms are bound in the mineral's crystal structure. Let us examine the property known as solubility — the ability of a mineral to dissolve in a liquid, like salt and water.

  • Elemental Compositions of Smectites Reveal Detailed

    Smectite clay minerals, a common product of chemical weathering of volcanic material or igneous rock under warm, humid conditions [1] and hydrothermal alteration of pyroclastic products [2,3], are ubiquitous in marine sediments [2]. Smectite has a range of various elemental compositions,

  • Chemical composition of smectites formed in clastic

    Smectite grains were identified by their chemical composition, which in all the studied samples was very different from detrital mica (muscovitic composition). As all the studied soils and sediments are unaffected by diagenetic alteration, illite was absent. Muscovite, TABLE2. Smectite-bearing marine sediments with their respective references.

  • Geology: Chemistry Of Clays

    Sep 30, 2009· Montmorillonite belongs to the smectite group of clays which are characterized by their composition of two tetrahedral sheets and a central sheet of alumina octahedrons. This type of clay is usually the product of the weathering of bentonite by volcanic ash, however, the mineral can also form in cave environments.

  • Illite/smectite formation and potassium mass transfer

    May 01, 1993· Mudrock samples from a well penetrating Eocene and Paleocene strata (1235-4455 m) of the Texas Gulf Coast have been studied to assess geochemical redistribution in mudrocks during burial diagenesis, and the mechanism by which detrital smectitic illite/smectite (I/S) is transformed into diagenetic illitic I/S. Idealized smectite and illite end-member compositions for interstratified I/S are

  • Smectite clay minerals: properties and uses

    Smectite is the name used for a group of phyllosilicate mineral species, the most important of which are montmorillonite, beidellite, nontronite, saponite and hectorite.

  • US7258733B2 - Viscosity stable smectite clay slurries

    A clay slurry is described using smectite clay, water, and a defined phosphonate additive that is hydrolytically stable over time. The viscosity of the clay slurry remains pourable and relatively unchanged over time compared to prior art slurries. The slurry is useful to provide rheological control to paints and coatings and is particularly useful as an anti-bleed additive for concrete.

  • Possible chemical controls of illite/smectite composition

    This is used to explain an almost isothermal change in the composition ofa sequence while others do not show such a rapid change. An indicator of the reaction is seen in the composition of the chlorite present in the rocks which is iron-rich and alumina-poor compared to chlorites in rocks showing aslower ate of change in the smectite content of

  • Clay Chemistry - Bentonite, Illite, Montmorillonite

    Smectite clays initially form through volcanic activity - volcanic ash to be specific. As such, we consider all healing clays ( in particular ) to be members of the Quartz class of crystals first and foremost, even though through the evolutionary process the crystalline structure of clays can be amazingly diverse.

  • Weathering & Clay Minerals - Tulane University

    The most common smectite is Montmorillinite, with a general chemical formula : (½Ca,Na)(Al,Mg,Fe) 4 (Si,Al) 8 O 20 (OH) 4. nH 2 O. Montmorillinite is the main constituent of Bentonite, derived by weathering of volcanic ash. Montmorillinite can expand by several …

  • Smectite clay identification and quantification as an

    (personal communication) considers more than about 5% smectite as risky if the material is to be used as a surfacing stone or a base course aggregate. Table 1 is a summary of the smectite limits suggested by these authors. Table 1. Summary of smectite content specifications suggested by authors.

  • Smectite - an overview ScienceDirect Topics

    Jul 16, 2010· The smectite group consists of minerals with the 2:1 structure already discussed for mica and vermiculite, but with a still lower charge per formula weight, namely 0.6–0.2. As in vermiculite, the interlayer contains exchangeable cations (Figure 5).

  • Characterization and classification of clay minerals for

    kaolinite (Abdou, 2013). The groups of smectite clays are distinguished by differences in the chemical composition pertaining substitutions of Al3+ or Fe3+ for Si4+ in the tetrahedral cation sites and Fe2+, Mg2+ or Mn2+ for Al3+ in the octahedral cation sites. Smectites have very thin layers and small particle sizes which contributes to high

  • Bentonites Clays and Minerals

    The smectite in most bentonites is the mineral montmorillonite, which is a dioctahedral smectite but occasionally other types of smectite may be present. It is the presence of smectite which imparts the desirable properties to bentonites, although associated factors such as the nature of the exchangeable cations in the interlayer also affect

  • Chemical composition of smectites formed in clastic

    The chemical composition of the VS smectite, determined by analytical electron microscopy (AEM), was reported by Drief and Nieto (2000) ( Table 1). The VS smectite is 1Md polytype.

  • Smectite group SpringerLink

    Feb 28, 2013· The smectite group (derived from the Greek, smectos, which means soap) shows large chemical variability, resulting in many specific mineral names (Güven, 1988).The most common smectite mineral is montmorillonite, which has the following representative chemical formula: X.3 ·nH 2 O [(Al 1.5 Fe 3+.2 Mg.3)Si 4 O 10 (OH) 2] −.3,

  • Cation exchange and adsorption on clays and clay minerals

    layer charge ξ (chemical composition) 0.39 0.44 0.43 Common clays 6 A set of samples with different contents of smectite, illite, kaolinite, chlorite and mixed-layer minerals was chosen for a series of adsorption experiments. The samples Augzin and Friedländer were supplied by Dr. Thorsten Permien, the samples Teistungen, Thierfeld and

  • USGS OFR01-041: Smectite group

    SMECTITE GROUP. Members of the smectite group include the dioctahedral minerals montmorillonite, beidellite, and nontronite, and the trioctahedral minerals hectorite (Li-rich), saponite (Mg-rich), and sauconite (Zn-rich). The basic structural unit is a layer consisting of two inward-pointing tetrahedral sheets with a central alumina octahedral

  • The chemical composition of gallstones: its relevance to

    This paper describes the methods in the study of the chemical composition of gallstones and the application of this knowledge to the practising surgeon in Southeast Asia. There are three types of stone in this part of the world. Inspecting with the naked eye, the surgeon is usually able to recognize …

  • Variations in Chemical Composition of Clay Minerals and

    abundance and chemical composition of hydrothermal minerals and magnetic susceptibility of the hydrother- stone that is classifi ed as wacke ( Teraoka, 2004 ). smectite; and zone IV, which is defi ned by the common presence of chlorite and illite ( Fig. 1 ).