| 单词 |
sodic |
| 释义 |
sodic, a.|ˈsəʊdɪk|
[f. sod-ium + -ic. Cf. F. sodique.]
a. Chem. Of, containing, or composed of sodium.
1859Mayne Expos. Lex. 1170 The only combination known of sodium with sulphur, or—sodic sulphur. 1869J. Phillips Vesuv. iv. 121 Examining..these hollow canals,..we find sublimed salts, especially ammoniac and sodic chlorides with free sulphur. 1878Hamilton Nervous Dis. 329 As regards the variety of bromide, I think the sodic is the most reliable and stable.
b. Geol. Of a mineral or rock: containing an appreciable or a greater-than-average quantity of sodium, often as compared with calcium or potassium. Also applied to a metamorphic process in which such minerals are formed.
1902Jrnl. Geol. X. 574 The standard SO3-bearing feldspathoid is therefore considered to be a purely sodic noselite. 1927S. J. Shand Eruptive Rocks xi. 200 More sodic types are also known, in which both orthoclase and quartz are present. 1952T. F. W. Barth Theoret. Petrol. 96 Plagioclases of gneisses and of crystalline schists, if zoned, usually show inverse order, that is, sodic core, calcic shell. 1967,1971[see potassic a. b]. 1978Nature 7 Sept. 23/1 In addition to the phenocrysts appropriate to magmas of intermediate bulk composition, andesite and dacite contain both anomalously calcic and sodic plagioclase. |
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