sodicadj.
/ˈsəʊdɪk/, U.S. /ˈsɑdɪk/ a. Chemistry. Of, containing, or composed of sodium.
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the world > matter > chemistry > elements and compounds > metals > specific elements > sodium > [adjective]
sodic1859
sodium1977
1859 R. G. Mayne Expos. Lexicon Med. Sci. (1860) 1170 The only combination known of sodium with sulphur, or—sodic sulphur.
1869 J. Phillips Vesuvius iv. 121 Examining..these hollow canals,..we find sublimed salts, especially ammoniac and sodic chlorides with free sulphur.
1878 A. M. Hamilton Nerv. Dis. 329 As regards the variety of bromide, I think the sodic is the most reliable and stable.
b. Geology. 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.
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the world > the earth > structure of the earth > formation of features > metamorphism > [adjective]
metamorphic1833
thermo-metamorphic1889
post-metamorphic1900
potassic1902
sodic1902
katamorphic1904
symphrattic1904
retrogressive1930
retrograde1932
Scourian1950
the world > the earth > minerals > mineral structure or appearance > [adjective] > sodic, potassic, or mafic
potassic1902
sodic1902
sodipotassic1902
mafic1912
the world > the earth > structure of the earth > constituent materials > rock > mineral or chemical composition > [adjective] > containing specific mineral
siliceous1656
auriferous1744
siliciferous1794
silicited1794
talcose1794
aluminiferous1804
silicated1806
venigenous1817
stanniferous1823
alumiferous1826
quartziferous1831
quartzofeldspathic1839
stannified1855
tinnified1855
acidic1876
lime-silicate1888
peralkalic1902
potassic1902
sodic1902
sodipotassic1902
felsic1912
peralkaline1913
peraluminous1927
1902 Jrnl. Geol. (Chicago) 10 574 The standard SO3-bearing feldspathoid is therefore considered to be a purely sodic noselite.
1927 S. J. Shand Eruptive Rocks xi. 200 More sodic types are also known, in which both orthoclase and quartz are present.
1952 T. 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 Amer. Mineralogist 52 828 The early part of the alteration sequence featured chiefly potassic metasomatism (biotite, potash feldspar), whereas the latter part was characterized by sodic metasomatism (aegirine, crocidolite).
1971 I. G. Gass et al. Understanding Earth i. 18/1 Two compositionally different feldspars, one more sodic and the other more potassic.
1978 Nature 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.
This entry has not yet been fully updated (first published 1913; most recently modified version published online March 2022).
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adj.1859