silicicadj.

/sɪˈlɪsɪk/

Etymology: < silic- (in silica n.) (or Latin silic- silex n.¹) + -ic suffix. Compare French silicique.

Chemistry.

Pertaining to, consisting of, or formed from silica. Chiefly in silicic acid, a very weakly acidic substance obtained esp. by the action of acids on solutions of silicates and usually existing in the form of colloidal solutions which contain H₄SiO₄ (orthosilicic acid) but consist mainly of polymeric oxyacids derived from this; any of these constituent acids.

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the world > matter > chemistry > chemical substances > acids > [noun] > acids-named > containing silicon

fluosilicic acid1817

silicic acid1817

silicomolybdic acid1871

the world > matter > chemistry > elements and compounds > metals > specific elements > silicon > [adjective] > compounds > silica

silicic1817

1817 T. Thomson Syst. Chem. (ed. 5) II. 92 It might therefore be distinguished by the name of silicic acid, which would be more systematic than the term silica.

1857 W. A. Miller Elements Chem.: Org. (1862) iii. §3. 188 Every acid forms at least one ether, and some, such as the silicic and boracic, furnish more than one.

1883 Science 1 490/1 The silica was prepared by decomposing silicic flouride with water.

1898 Jrnl. Chem. Soc. 74 ii. 509 When silicon tetrachloride is heated with mandelonitrile or lactonitrile, silicic acid and complex tarry products are formed.

1913 E. Hatschek Introd. Physics & Chem. Colloids v. 41 If a solution of sodium silicate..is decomposed by a slight excess of hydrochloric acid, and the mixture is dialysed until the free acid and the sodium chloride have been removed, there remains in the dialyser a perfectly clear colourless sol of silicic acid.

1955 Sci. Amer. Sept. 65/3 The more volatile or acidic or silicic constituents of the fluid rock beneath the surface may have concentrated in the original uplifts.

1973 E. G. Rochow in J. C. Bailar et al. Comprehensive Inorg. Chem. I. xv. 1409 The relations between silicon dioxide and water are so close..that it often is difficult to distinguish between solutions of silica, solutions of distinct molecular silicic acids, colloidal dispersions of silica, the definite hydrates of SiO₂, hydrated silica in general, and silica gel.

This entry has not yet been fully updated (first published 1910; most recently modified version published online June 2018).

单词	silicic
释义	silicicadj. /sɪˈlɪsɪk/ Etymology: < silic- (in silica n.) (or Latin silic- silex n.¹) + -ic suffix. Compare French silicique. Chemistry. Pertaining to, consisting of, or formed from silica. Chiefly in silicic acid, a very weakly acidic substance obtained esp. by the action of acids on solutions of silicates and usually existing in the form of colloidal solutions which contain H₄SiO₄ (orthosilicic acid) but consist mainly of polymeric oxyacids derived from this; any of these constituent acids. ΘΚΠ the world > matter > chemistry > chemical substances > acids > [noun] > acids-named > containing silicon fluosilicic acid1817 silicic acid1817 silicomolybdic acid1871 the world > matter > chemistry > elements and compounds > metals > specific elements > silicon > [adjective] > compounds > silica silicic1817 1817 T. Thomson Syst. Chem. (ed. 5) II. 92 It might therefore be distinguished by the name of silicic acid, which would be more systematic than the term silica. 1857 W. A. Miller Elements Chem.: Org. (1862) iii. §3. 188 Every acid forms at least one ether, and some, such as the silicic and boracic, furnish more than one. 1883 Science 1 490/1 The silica was prepared by decomposing silicic flouride with water. 1898 Jrnl. Chem. Soc. 74 ii. 509 When silicon tetrachloride is heated with mandelonitrile or lactonitrile, silicic acid and complex tarry products are formed. 1913 E. Hatschek Introd. Physics & Chem. Colloids v. 41 If a solution of sodium silicate..is decomposed by a slight excess of hydrochloric acid, and the mixture is dialysed until the free acid and the sodium chloride have been removed, there remains in the dialyser a perfectly clear colourless sol of silicic acid. 1955 Sci. Amer. Sept. 65/3 The more volatile or acidic or silicic constituents of the fluid rock beneath the surface may have concentrated in the original uplifts. 1973 E. G. Rochow in J. C. Bailar et al. Comprehensive Inorg. Chem. I. xv. 1409 The relations between silicon dioxide and water are so close..that it often is difficult to distinguish between solutions of silica, solutions of distinct molecular silicic acids, colloidal dispersions of silica, the definite hydrates of SiO₂, hydrated silica in general, and silica gel. This entry has not yet been fully updated (first published 1910; most recently modified version published online June 2018). < adj.1817
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