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allemontite

American  
[al-uh-mon-tahyt] / ˌæl əˈmɒn taɪt /

noun

  1. a white to gray, brittle mineral, antimony arsenide, AsSb, occurring in reniform masses: formerly used as an ore of arsenic.


Etymology

Origin of allemontite

1830–40; named after Allemont (place in France where found); -ite 1