Silicated - Hutchinson encyclopedia article about Silicated(Site not responding. Last check: 2007-11-06)
Pyroxenes are single chain silicates, with chains of linked tetrahedra extending in one direction through the structure; amphiboles are similar but have double chains of tetrahedra.
In micas, which are sheet silicates, the tetrahedra are joined to form continuous sheets that are stacked upon one another.
Framework silicates, such as feldspars and quartz, are based on three-dimensional frameworks of tetrahedra in which all oxygens are shared.
silicate - Columbia Encyclopedia article about silicate (via CobWeb/3.1 planetlab1.isi.jhu.edu)(Site not responding. Last check: 2007-11-06)
Silicates may be considered chemically as salts of the various silicic acids.
, serpentine serpentine (sûr`pəntēn, –tīn), hydrous silicate of magnesium.
is a mixture of silicates, as is water glass water glass or soluble glass, colorless, transparent, glasslike substance available commercially as a powder or as a transparent, viscous solution in water.
The process of claim 1 wherein the catalyst is selected from the group consisting of barium hydroxide, hydrated barium hydroxide, monohydroxide barium salts, strontium hydroxide or mixtures thereof.
The preferred catalysts are barium hydroxide, hydrated barium hydroxide and monohydroxide barium salts or mixtures thereof and the equivalent strontium compounds.
The residual catalyst in the polyols produced by the process of this invention may be neutralized and/or removed by any of the procedures well-known to those skilled in the art, for example, neutralization of the catalyst by acids such as phosphoric acid, sulfuric acid, acetic acid and solid organic acids as described in U.S. Pat.
Since the alumina monohydroxide of the sol is neither white nor colored, it is not a pigment and does not function as a pigment in the present invention.
The alumina monohydroxide is not a pigment and does not function as a pigment in the present invention.
Amorphous precipitated silica is usually obtained by precipitation from an aqueous solution of alkali metal silicate such as sodium silicate or potassium silicate using a suitable acid such as sulfuric acid, hydrochloric acid, or carbon dioxide.
