Plural form of arsenotungstate; chemical compounds containing both arsenic and tungsten atoms bonded with oxygen.
From arseno- (arsenic) + tungstate (a salt of tungstic acid). Tungsten comes from Swedish tung (heavy) + sten (stone). These compounds were named in the 19th century as chemists discovered new metal combinations.
Arsenotungstates are part of a fascinating class of mixed-metal compounds called polyoxometalates, which are so precisely structured that chemists use them to study how atoms arrange themselves in complex ways.
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