Single chain silicates

Figure 4.4 Infinite chain silicates (single, double, and sheet) (a) infinite single chain silicate with two corners shared per tetrahedron (pyroxene structure) (b) infinite double chain, with alternate two and three corners shared (am-phibole structure) (c) infinite sheet structure, with each tetrahedron sharing three corners (sheet silicates). (From Putnis, 1992 Figure 6.3, by permission of Cambridge University Press.)...

The pyroxenes are chemically complex but common rock-forming minerals. They resemble the amphiboles in many ways, but are actually single-chain silicates. The tetrahedral basic unit of the pyroxenes, [(Al,Si)20g] , was schematically depicted in Fig. 2.1C. The general formula for the group is Ai (B, C)i+ TjOfi, where A = Ca" Fe Li+, Mg "", Na-" B = Mg ", Fe Mn" Sc+ C = Fe A Cr" Ti " and T = Si Al+l Within the group are several mineral series and several species that often occur in acicular or fibrous forms. One species that occurs in fibrous form is jadeite, [Na(Al,Fe )Si206], a relatively familiar name because of the popularity of this material with Oriental sculptors. 

Fig. 5.18. The Si L2 3 x-ray emission spectra of various silicates, as shown, and of quartz. In terms of structural silicate groups (1-7) are island silicates, (8-9) ring silicates, (10-U) single-chain silicates, (12-15) double-chain silicates, (16-19) sheet silicatesj (20-22) framework silicates (after Dikov et al., 1976 reproduced with the publisher s permission).

Deer, W. A., R. A. Howie, and J. Zussman (1978). Rock Forming Minerals, Vol. 2A Single Chain Silicates. London Longmans. 

Single chain silicates Enstatite 0.2 0.25 1,500-2,000 h 0.1 M buffer solutions Ferruzzi (1993)... 

Single-chain silicates. Single-chain silicates, (Si03)n , are called pyroxenes. (Note that n is not intended to mean the chain length, which is infinite. ) Examples are enstatite (Mg[Si03[) and diopside, MgCa[(Si03)2]. 

Fig. 6.7. Linear single-chain silicates [Si03] and their organosilicon analogues [Me2SiO]n...

Associate an important, practical mineral with each of the following types of silicates (a) orthosilicate, (l>) single-chain silicate, (double-chain silicate,... 

Figure 4.5 Structure of pyroxene minerals (a) demonstration of the end view of the single silicate chain (b) end view of the stacking arrangement of single chains, showing the position of the metal cations. There are two different cationic environments, Ml and M2. (After Putnis, 1992 Figure 6.11, by permission of Cambridge University Press.)...

Fig. 2.1 Configurations of the tetrahedral units and chain, double chain, and sheet structures in the silicate and aluminosilicate minerals. (A) Two-dimensional representation of a single silicate tetrahedron. (A ) Two-dimensional representation of an extended silicate chain. (B) Three-dimensional representations of single tetra-hedra in two orientations. The apexes of the tetrahedra point above or below the plane of the paper. (B ) Three-dimensional representations of extended silicate chains showing different orientations of the tetrahedra in two of the many possible configurations. Single chain pyroxenes (C), wollastonite (D), rhodonite (E). Double chains amphiboles (F). Sheets as found in the serpentines, micas, and clays (G).

Fig. 16.1 Various silicate structure (a) Si04 tetrahedron. When carrying a —4 charge, this s the orthoslknte ion. (b) The dbalicalc anion- (c) Portion of an infinite single chain. (SiO ) "-- (d) Portion of an infinite double clcun or band. Si40,itff. (e) Portion of a sheet or layer structure. (Si2Oj 2, —.

Figure 4 Structures of (a) ortho (isolated) (b) single chain (c) double chain and (d) sheet silicates...

Fig. 5.66. Forms of silicates resulting from different ways of linking up Si04 tetrahedra (a) single chain of tetrahedra (b) double chain of tetrahedra, as in asbestos (c) sheets of tetrahedra, as in clay, mica, and talc and (d) networks of tetrahedra, as ii ultiamaiine.

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