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Crystalline solids silicates

Brinker, C.J. Tallant, D.R. Roth, E.P. Ashley, C.S. Sol-gel transition in simple silicates. III. Structural studies during densification. J. Non-Crystalline Solid 1986, 82, 117-126. [Pg.58]

Pederson, L. R., Baer, D. R., McVay, G. L. Engelhard, M. H. 1986. Reaction of soda-lime silicate glass in isotopically labelled water. Journal of Non-Crystalline Solids, 86, 369-380. [Pg.409]

A new class of pentacoordinate zwitterionic silicates (52-70) has been developed and reported by Tacke and his coworkers28-31 46-52 (cf Section II.A.3). These are generally high melting crystalline solids, which are almost insoluble in nonpolar organic solvents, and only slightly soluble in polar solvents. [Pg.1357]

The silicate anion with a double five-membered ring structure is mainly formed as a crystalline solid from the tetra-n-butylammonium (N+(n-C Ho) ) silicate solutions whose N/Si ratios range from 0.78 to 1.0 (20,21). Pyridinium ions are also effective in forming silicate anions with cage-like structures (27). [Pg.141]

The partitioning of elements between aqueous solution and crystals and between silicate melts and crystalline solids in the light of thermodynamic theory was excellently reviewed by McIntyre (1963). [Pg.166]

The two five-membered rings of this spirocyclic X. Si-silicon(IV) complex each contain two oxygen atoms, one nitrogen atom, one carbon atom, and one (pentacordinate) silicon atom. As shown in Scheme 8, this compound was prepared by analogy to the synthesis of the related A, Si-silicates 10-16. Thus, treatment of (MeO)3SiCH2NMe2 with two mole equivalents of acetohydroxamic acid in acetonitrile at room temperature yielded 28 in 80 % yield as a crystalline solid [5]. The formation of this compound can be understood in terms of a reaction of (MeO)3SiCH2NMe2 with the 1,2-diol acetohydroximic acid, which is a tautomer of acetohydroxamic acid. [Pg.442]

Fig. 8.10. Chemical shifts from NMR spectra of solid and molten silicates. L indicates liquid at temperature shown G indicates glass and C, crystalline solid. Arrows indicate linewidth (not errors) (after Stebbins et al., 1985 reproduced with the publisher s permission). Fig. 8.10. Chemical shifts from NMR spectra of solid and molten silicates. L indicates liquid at temperature shown G indicates glass and C, crystalline solid. Arrows indicate linewidth (not errors) (after Stebbins et al., 1985 reproduced with the publisher s permission).
As may be expected from their zwitterionic nature, the A, 5/-silicates la-7a and the X Ge-germanates lb-7b are high-melting crystalline solids All compounds are almost insoluble in unpolar solvents and exhibit very poor solubility in polar organic solvents. [Pg.468]

Banner, D., and Klarsfeld, S. "High Temperature Infrared Spectra of Silicate Melts." In Physics of Non-crystalline Solids, edited by L. D. Pye, W. C. La Course, and H. J. Stevens, 371-75, London, 1992. [Pg.139]

Potassium bicarbonate (poe-TAS-ee-yum buy-KAR-bo-nate) is a colorless crystalline solid or white powder with no odor and a salty taste. It occurs naturally in salt beds, sea water, silicate rocks, and a number of foods, primarily fruits and vegetables. Potassium bicarbonate is also present in the tissues of humans and other animals, where it is involved in a number of essential biological processes, including digestion, muscle contraction, and heartbeat. It is used primarily in cooking and baking, as a food additive, and in fire extinguishers. [Pg.621]

Acid-base catalysis produces mostly carbenium ions by electron or by proton transfer. Among the solid acids, microporous, crystalline alumina silicates (zeolites) are utilized most frequently. [Pg.513]

PHYSICAL PROPERTIES eolorless to white crystalline solid bitter, chocolate-like odor soluble in ethyl acetate, ethyl silicate, ethyl borate, 1-bromopropane, carbon disulfide. [Pg.533]

Reiner K. On the mobility of alkaline earth ions in mixed alkali alkaline earth silicate glasses. Journal of Non-crystalline Solids. 2003 328(l-3) 157-163.DOI 10.1016/ 50022-3093(03)00474-5. [Pg.151]

The bifluorides syn. hydrogendifluorides, are crystalline solids containing the HF2 species. Examples include sodium bifluoride and potassium bifluoride. They are crystalline solids soluble in water or water-alcohol solutions and extremely corrosive to metals, glass, and other siliceous materials. They are used as etchants. [Pg.130]


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See also in sourсe #XX -- [ Pg.241 , Pg.242 , Pg.243 , Pg.244 ]

See also in sourсe #XX -- [ Pg.546 , Pg.547 , Pg.548 ]




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Crystalline silicates

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