Classification of silicates

The chemical classification of silicates is based on their multiplicity and type of structural arrangement. It partly differs from the classification commonly adopted in mineralogy (table 5.2). 

Table 5.3 Rostov s classification of silicates. A = axial P planar I = isometric (from Liebau, 1982).

Kostov I. (1975). Crystal chemistry and classification of silicate minerals. Geochem. Mineral Petrol, 1 5-14. 

Liebau E (1982). Classification of silicates. In Reviews in Mineralogy, vol. 5, P. H. Ribbe (series ed.), Mineralogical Society of America. 

TABLE 3E. Classification of Silicate Minerals Based on Structural Arrangements in Silicate Crystal Lattices... 

The structural classification of silicates is based on the polymerization of silicon tetrahedra (Si04) and on the proportion of silicon-to-oxygen atoms (Si 0) as follows ... 

The silicate minerals are, of course, characterized by the presence of the tetrahedral Si04 cluster unit and the crystal chemistry and classification of silicates dominated by the structures built up by the linking together... 

Classification of Silicates On the basis of corners (0 1,2, 3 or 4) of the Si04 tetrahedra shared with other neo-silicate. 

Zoltai T (1960) Classification of silicates and other minerals with tetrahedral stmctures. Am Mineral 45 960-973... 

TABLE P.2 Classification of Silicate Compounds in Earth s Crast ( )... 

A classification of silicates with predominantly two-dimensional cross-linking of [SiOJ tetrahedra leads to the trichotomy presented in Figures 2 and 3. Layered silicate hydrates, disilicates, and clay minerals differ in the repetitive characteristic binding element within the layers. The silicon oxygen tetrahedra within a sheet are connected by three bridging oxygen atoms. In the case of clay minerals, the fourth valency is saturated by foreign metal ions (e.g., Mg +)... 

Structural Classification of Silicates Found in Glass-Ceramics ... 

Figure 1.7 Classification of silicate-based ceramics (after Hennicke, 1967).

S Silicates-The Basic Building Blocks of Rocks 905 Table 40.2 Classification of silicate types depending on the supply of oxygen... 

Polyhedra in crystal structures (see Section 10.3) can be used as elements of simpler networks formed by common comers, edges or even faces. Many structures can now be classified into island, chain, sheet and framework stmctures (see Figure 4), Very impressive examples are the classification of silicates, of oxides and oxysalts, or of metals and alloys. ... 

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