| 释义 |
trisilicate Chem. and Min.|traɪˈsɪlɪkət|
[f. tri- + silicate.]
A compound of one or more basic oxides with silicon dioxide or silica, SiO2: a. in early nomenclature denoting a compound of silicon dioxide with three equivalents of the base (see note s.v. tri- 5 a); thus trisilicate of iron denoted a compound of three equivalents of iron oxide and one of silicon dioxide, then called silicic acid; b. now used for compounds derived from hypothetical trisilicic acids, formed of three molecules of silicon dioxide (SiO2) with varying numbers of water molecules; e.g. 3SiO2.2H2O; 3SiO2.5H2O. c. In Mineralogy, denoting a silicate in which the oxygen in the silicon dioxide bears to the oxygen in the basic oxides the ratio 3:1. So trisilicic |traɪsɪˈlɪsɪk| a.: see b.
1850Daubeny Atom. The. (ed. 2) 112 Trisilicate of iron [denotes] 3 of base to 1 of silicic acid. 1868Watts Dict. Chem. V. 243 Silicates are sometimes distinguished by names which express directly the oxygen-ratio in the base and acid..1:3 Trisilicates. Ibid. 251 Bohemian glass-tubing consists of potassio-calcic trisilicate, 2(K2O.3SiO2)3(Ca{pp}O.3SiO2). 1902H. A. Miers Mineralogy 208 Albite, Na2O.Al2O3.6SiO2 or NaAlSi3O8... According to [its] oxygen ratio, therefore..Albite is a trisilicate. 1905Newth Inorg. Chem. (ed. 11) 637 By the partial withdrawal of water from three molecules of silicic acid a number of hypothetical trisilicic acids may be derived... Felspar, or orthoclase, is a trisilicate, Al2K2(Si3O8)2. 1911Roscoe & Schorlemmer Treat. Chem. (ed. 4) I. 920 Derivatives of trisilicic acid, H4Si3O8[3Si(OH)4{b1}4H2O]. |