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- Nanoclays (Montmorillonite, Bentonite, Smectite) Synonyms:
Montmorillonite, Smectite, Sodium montmorillonite (Sodium bente (Wyoming bentonite (US)), Swelling bentonite (Western bentonite (US),Sodium-activated bentonite (Bentonite (UK)), Sodium-exchanged bentonite, (Synthetic bentonite)), Calcium montmorillonite (Calcium bentonite (Mississippi bentonite (US)), Sub-bentonite (Texas bentonite (US)), Magnesium montmorillonite (Saponite & Armargosite), Potassium montmorillonite (Metabentonite), and Lithium montmorillonite (Hectorite), Giliabit, Goumbrine, Gumbrine, Walkerite, Walkthon,
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Nanoclays (Montmorillonite, Bentonite, Smectite) Designations:
Chemical Name: Hydrated sodium calcium aluminum silicate
Chemical Formula: (Na, Ca)(Al,Mg)6(Si4010)3(OH)6-nH20
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Nanoclays (Montmorillonite, Bentonite, Smectite) Description:
a) A clay mineral having a 2:1 expanding crystal lattice. Isomorphous substitution gives the various types and causes a net permanent charge balanced by cations in such a manner that water may move between the sheets, giving reversible cation exchange and very plastic properties.
b) Smectite refers to a family of non-metallic clays primarily composed of hydrated sodium calcium aluminum silicate. Common names for smectite include montmorillonite or sodium montmorillonite ("sodium bentonite" or "Wyoming bentonite") and swelling bentonite ("Western bentonite").
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Nanoclays (Montmorillonite, Bentonite, Smectite) Nominal Chemical Composition (%):
Al= 9.98, Si= 20.78, H= 4.10 and 0=65.12
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Nanoclays (Montmorillonite, Bentonite, Smectite) Physical Properties Available:
Powder as fine as 20 nanometers
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Nanoclays (Montmorillonite, Bentonite, Smectite) Nominal Physical Constants:
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Molecular Weight (g/mol.)
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540.46
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Average Density (g/cm3)
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2.35
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Crystal System
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Monoclinic
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Member Of
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Smectite group
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Fracture
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Uneven to lamellar
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Luster
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Earthy (dull)
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Thermal Conductivity (cal/s-cm-°C)
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Mohs Hardness @20°C
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1.5- 2.0
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Average Specific Gravity (g/cc)
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2.3- 3
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Color
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White, yellow
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Cleavage
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Perfect in one direction, basal
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Characteristic
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Crystals expand to many times their volume when added to water
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Field Indicators
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Softness, and soapy feel
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Nanoclays (Montmorillonite, Bentonite, Smectite) Typical Applications:
a) Used to slow the progress of water through soil or rocks;
b) Used in drilling muds to give the water greater viscosity;
c) Nanoclays are the most commonly used commercial additive for the preparation of nanocomposites, accounting for nearly 80% of the volume used.
d) Used as an absorbent to purify and decolor liquids;
e) Used as a filler in paper and rubber;
f) Used as a base for cosmetics and medicines
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Nanoclays (Montmorillonite, Bentonite, Smectite) Packaging:
a) Jars, pails, drums, multiply paper bags, bulk bags and fiberboard containers.
b) For further information on packaging options Contact READE
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Nanoclays (Montmorillonite, Bentonite, Smectite) TSCA (SARA Title III) Status:
a) Listed. For further information please call the E.P.A. at +1.202.554.1404
b) Premanufacture Notice (PMN): Nano-sized nanoclays from READE are to be used for R&D applications only.
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