orthosilicaten.
/ˌɔːθə(ʊ)ˈsɪlᵻkət/, /ˌɔːθə(ʊ)ˈsɪlᵻkeɪt/, U.S. /ˌɔrθoʊˈsɪlᵻkᵻt/ Chemistry.
A salt containing the anion SiO44−; the anion itself; a salt or ester of orthosilicic acid; any mineral or other compound containing discrete tetrahedral SiO4 anions.
ΚΠ
1859 W. Odling in London, Edinb., & Dublin Philos. Mag. 4th Ser. 18 368 (heading) On Ortho- and Meta-silicates.
1876 H. E. Armstrong Introd. Study Org. Chem. xii. 342 (table) Ethylic orthosilicate..C(OC2H5)4.
1889 Amer. Naturalist 23 908 Clarke suggests that all of the true micas are isomorphous combinations of derivatives of aluminium orthosilicate [Al4(SiO4)3] and of the corresponding polysilicic compound [Al4(Si8O8)3].
1922 T. M. Lowry Inorg. Chem. xxix. 511 Serpentine is a very beautiful rock formed by the decomposition of ferromagnesian orthosilicates, such as olivine.
1995 A. M. Wilson Infinite in Finite vii. 129 The orthosilicate ion (SiO4)4− in these minerals forms a tetrahedron, having an oxygen ion at each vertex, with the silicon ion at its centre. This is known as the ‘olivine structure’.
2002 Jrnl. Coatings Technol. (Nexis) 74 125 One of the commonly used sol-gel precursors is tetraethyl orthosilicate.., which has been applied in coating for preparing zinc-rich primers.
This entry has been updated (OED Third Edition, September 2004; most recently modified version published online March 2022).
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