/ˌsəʊdə(ʊ)pəˈtæsɪk/.sodipotassicadj.
/ˌsəʊdɪpəˈtasɪk//ˌsəʊdə(ʊ)pəˈtæsɪk/. Geology.
Containing both sodium and potassium in appreciable quantities. In quot. 1902 used to denote a specified compositional range in the classification scheme of Cross, Iddings, Pirsson, and Washington.
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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) 10 596 The minerals of the sodalite group are only present in the sodic or sodipotassic Sub~rangs of Classes I, II and III.
1927 S. J. Shand Eruptive Rocks ix. 163 A typical example of the Quincy granite gave quartz 33, sodipotassic felspar 55, and ægirine and riebeckite 10 per cent.
1974 T. G. Sahama in H. Sørensen Alkaline Rocks 98/1 The rocks are mainly potassic to perpotassic, but sodopotassic to sodic varieties are known among the jumillites and fortunites.
This entry has not yet been fully updated (first published 1986; most recently modified version published online December 2020).
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adj.1902