metasilicicadj.

Brit.

/ˌmɛtəsᵻˈlɪsɪk/, U.S.

/ˈˌmɛdəsəˈlɪsɪk/

Origin: Formed within English, by derivation. Etymons: meta- prefix, silicic adj.

Etymology: < meta- prefix + silicic adj.

Chemistry.

metasilicic acid n. an oxoacid of silicon obtained by partial dehydration of orthosilicic acid and having the general formula H₂SiO₃, now believed not to exist in a monomeric state but to contain long-chain polyanions.

ΚΠ

1879 H. Watts Dict. Chem. (new ed.) VI. 825 Metasilicic Acid, see silica.

1889 Amer. Jrnl. Sci. 138 154 Professor P. Groth..points out that polysilicic acid may be regarded as compounded of disilicic and metasilicic acids.

1906 H. J. H. Fenton Notes Qualitative Anal. (new ed.) 32 Metasilicic acid SiO₂.H₂O and orthosilicic acid SiO₂.2H₂O can be obtained under certain conditions of drying.

1938 R. Hum Chem. for Engin. Students xxv. 687 Metasilicic acid, H₂SiO₃ (H₄SiO₄ − H₂O or SiO₂.H₂O) gives sodium metasilicate, [etc.].

1973 E. G. Rochow in J. C. Bailar et al. Comprehensive Inorg. Chem. xv. 1411 Metasilicic acid, H₂SiO₃ or SiO₂·H₂O,..has a solubility of 10×10⁻⁴ moles per litre of water at 20°.

1988 F. A. Cotton & G. Wilkinson Adv. Inorg. Chem. (ed. 5) ix. 280 There is actually neither metasilicic acid not [sic] any discrete metasilicate anion. With the exception of the few ‘metasilicates’ with cyclic anions, such compounds contain infinite chain anions.

1992 Dict. Inorg. Compounds III. 3362/2 Silicic acid... Metasilicic acid..H₂SiO₃..Synth. by partial dehydration of H₄SiO₄ with aq. H₂SO₄ or Me₂CO.

This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022).

单词	metasilicic
释义	metasilicicadj. Brit. /ˌmɛtəsᵻˈlɪsɪk/, U.S. /ˈˌmɛdəsəˈlɪsɪk/ Origin: Formed within English, by derivation. Etymons: meta- prefix, silicic adj. Etymology: < meta- prefix + silicic adj. Chemistry. metasilicic acid n. an oxoacid of silicon obtained by partial dehydration of orthosilicic acid and having the general formula H₂SiO₃, now believed not to exist in a monomeric state but to contain long-chain polyanions. ΚΠ 1879 H. Watts Dict. Chem. (new ed.) VI. 825 Metasilicic Acid, see silica. 1889 Amer. Jrnl. Sci. 138 154 Professor P. Groth..points out that polysilicic acid may be regarded as compounded of disilicic and metasilicic acids. 1906 H. J. H. Fenton Notes Qualitative Anal. (new ed.) 32 Metasilicic acid SiO₂.H₂O and orthosilicic acid SiO₂.2H₂O can be obtained under certain conditions of drying. 1938 R. Hum Chem. for Engin. Students xxv. 687 Metasilicic acid, H₂SiO₃ (H₄SiO₄ − H₂O or SiO₂.H₂O) gives sodium metasilicate, [etc.]. 1973 E. G. Rochow in J. C. Bailar et al. Comprehensive Inorg. Chem. xv. 1411 Metasilicic acid, H₂SiO₃ or SiO₂·H₂O,..has a solubility of 10×10⁻⁴ moles per litre of water at 20°. 1988 F. A. Cotton & G. Wilkinson Adv. Inorg. Chem. (ed. 5) ix. 280 There is actually neither metasilicic acid not [sic] any discrete metasilicate anion. With the exception of the few ‘metasilicates’ with cyclic anions, such compounds contain infinite chain anions. 1992 Dict. Inorg. Compounds III. 3362/2 Silicic acid... Metasilicic acid..H₂SiO₃..Synth. by partial dehydration of H₄SiO₄ with aq. H₂SO₄ or Me₂CO. This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022). < adj.1879
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