tungstate
noun
tung·state ˈtəŋ-ˌstāt 
: a salt or ester of a tungstic acid and especially of H2WO4
Example Sentences
Recent Examples on the Web The mine was once used to produce an iron manganese tungstate mineral for craft light bulb filament. 
Dave Quinn, PEOPLE.com, 25 July 2019
Dave Quinn, PEOPLE.com, 25 July 2019 Word History
First Known Use
1800, in the meaning defined above
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