silicotungstic acid
noun
sil·i·co·tungstic acid
"+…-
: any of several heteropoly acids of silicon and tungsten
especially : a pale-yellow crystalline acid H4SiW12O40.x H2O containing 12 atoms of tungsten in the molecule, obtainable by acid hydrolysis of a mixture of sodium tungstate and sodium silicate, and used chiefly as a precipitant for alkaloids
called also tungstosilicic acid
Word History
Etymology
silic- + tungstic