Silica example sentences

Aluminium, calcium, silica, iron, magnesium are the major elements of amphiboles.Magnesium, iron and silica are major elements of olivine.Silica in its normal form is almost nonreactive because of very high Si—O bond enthalpy.Quartz, cristobalite and tridymite are some of the crystalline forms of silica, and they are interconvertable at suitable temperature.When silicate units are linked together, they form chain, ring, sheet or three-dimensional structures.In silicates either the discrete unit is present or a number of such units are joined together via corners by sharing 1,2,3 or 4 oxygen atoms per silicate units.It comprises of potassium, aluminium, magnesium, iron, silica etc.Bauxite deposits are formed by the decomposition of a wide variety of rocks rich in aluminium silicates.Silica gel is used as a drying agent and as a support for chromatographic materials and catalysts.Negative charge on silicate structure is neutralized by positively charged metal ions.Pyroxene consists of calcium, aluminum, magnesium, iron and silica.If aluminium atoms replace few silicon atoms in three-dimensional network of silicon dioxide, overall structure known as aluminosilicate, acquires a negative charge.Silicon is the second (2 7 % by mass) most abundant element on the earth's crust and is present in nature in the form of silica and silicates.Silicon dioxide, commonly known as silica, occurs in several crystallographic forms.A large number of silicates minerals exist in nature.