sil·i·co·tungstic acid | \ "+...- \
Definition of silicotungstic 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
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