Muscovites

Fig. V-7. f potential of muscovite mica versus electrolyte concentration at pH 5.8 0.3. (From Ref. 76.)...

Erlandsson R, Hadzioannou G, Mate M, McClelland G and Chiang S 1988 Atomic scale friction between the muscovite mica cleavage plane and a tungsten tip J. Chem. Phys. 89 5190... 

Muscovite mica Muscular weakness Mushroom Mushrooms... 

Muscovite mica formed as a primary mineral in pegmatites and granodiorite differs in physical properties compared to muscovite mica formed by secondary alteration (mica schist) (Table 2). The main differences are in flexibiUty and abiUty to be delaminated. Primary muscovite is not as brittle and delaminates much easier than muscovite formed as a secondary mineral. Mineralogical properties of the principal natural micas are shown in Table 3. The make-up of muscovite, phlogopite, and biotite are as follows ... 

Property Muscovite Phlogopite Biotite Synthetic fluorophlogopite... 

Orientation of optical plane to plane of symmetry is parallel muscovite is perpendicular. 

Tensile strength compression strength for muscovite and phlogopite is 221 MPa. To convert MPa to psi, multiply by 145. Chemically combined. 

Flake mica is also produced from mica schist which normally contains from 30—60% recrysta11i2ed muscovite mica along with quart2 and iron minerals. The quart2 is usually not suitable for glass sand or high purity material, however. 

Table 5. Chemical Analysis of Ground Muscovite Mica ...

Pacer Corp. Custer, S.D. flake 70% muscovite mica for oil-weU use... 

Quality Classification of Muscovite Block Mica, ASTM D351, ASTM, Philadelphia, Pa., 1961, p. 1046. 

A 1.0 nm basal spacing exhibited in a diffractogram peak that is somewhat broad and diffuse and skewed toward wider spacings characterizes the x-ray diffraction pattern of iUite. Polymorphs may be present (120). Muscovite derivatives are typicaUy dioctahedral phlogopite derivatives are trioctabedral. 

Regularly interstratified (1 1) chlorite and vermiculite has been attributed to the mineral corrensite [12173-14-7] (141). Chlorite mixed layers have been documented with talc, vermicuhte, smectite, iUite, biotite, kaolinite, serpentine, and muscovite. The mixed-layer mineral is named after the components, eg, talc—chlorite. The eadier Hterature, however, has reference to specific minerals such as kulkeite [77113-95-2] (talc—chlorite and tosudite... 

Mica [12001 -26-2]—Cl Pigment White 20, Cl No. 77019. A white powder obtained from the naturally occurring mineral muscovite mica, consisting predominantly of a potassium aluminum siHcate, [1327-44-2] H2KAl2(Si0 2- Mica may be identified and semiquantitatively determined by its characteristic x-ray diffraction pattern and by its optical properties. 

Silicates with layer. structures include some of the most familiar and important minerals known to man, partieularly the clay minerals [such as kaolinite (china clay), montmorillonite (bentonite, fuller s earth), and vermiculite], the micas (e.g. muscovite, phlogopite, and biotite), and others such as chrysotile (white asbestos). 

Figure 9.12 Schematic representation of the structures of muscovite mica, (K2Al4(Si6Ali)02o(OH)4], hydrated montmorillonite, [Al4Sig02o(OH)4].xH20 and chlorite, (MgioAl2(Si6Al2)02o(6H)i6], see text.

Figure 9.13 Alternative representations of muscovite and chlorite (after B. Mason and 1.. G. Berry ...

Fenchel, m. fennel, -geruch, m. fennel odor, -holz, n. sassafras wood, -ttl, n. fennel oil, -wasser, n, (Pharm.) fennel water, Fenchocamphersaure, /, fenchocamphoric acid. Fenster, n, window, -glasi n, window glass, -glimmer, m. muscovite, -kitt, m. glaziera putty,... 

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