metasilicaten.
/ˌmɛtəˈsɪlᵻkət/, /ˌmɛtəˈsɪlᵻkeɪt/, U.S. /ˌmɛdəˈsɪləkət/, /ˌmɛdəˈsɪləˌkeɪt/ Chemistry.
Originally: the anion SiO32−; a salt or mineral containing this. Later: any compound or mineral having cyclic or very long chain anions of formula (SiO32−)n.
ΚΠ
1859 W. Odling in London, Edinb., & Dublin Philos. Mag. 4th Ser. 18 368 (heading) On ortho- and meta-silicates.
1869 Nature 16 Dec. 186/1 These very important minerals group themselves as ortho-, para-, or meta-silicates.
1872 H. Watts Dict. Chem. Suppl. 1018 The metasilicates of the earth-metals may be prepared by precipitating a dilute solution of the sodium salt with a solution..of an earth-metal salt.
1910 Encycl. Brit. I. 149/1 Acmite..a mineral of the pyroxene group..may be described as a soda-pyroxene, being essentially a sodium and ferric metasilicate, NaFe(SiO3)2.
1937 W. L. Bragg Atomic Struct. Minerals ix. 142 Such compounds have in the past been termed ‘metasilicates’, but it must be realized that there are no individual (SiO3)″ groups.
1940 F. F. Grout Kemp's Handbk. Rocks (ed. 6) i. 16 The pyroxenes and amphiboles are often collectively referred to as metasilicates.
1988 F. A. Cotton & G. Wilkinson Adv. Inorg. Chem. (ed. 5) ix. 280 The general formula of the anion in a pyroxene is the same as in a silicate with a cyclic anion. Silicates with this general stoichiometry are often called ‘metasilicates’, especially in older literature.
This is a new entry (OED Third Edition, December 2001; most recently modified version published online March 2022).
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n.1859