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

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