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brewsterite

noun
brew·​ster·​ite | \-əˌrīt\
plural -s

Definition of brewsterite 

: a mineral consisting of a zeolite containing barium and strontium (Sr,Ba,Ca)Al2Si6O16.5H2O (hardness 5, specific gravity 2.45)

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History and Etymology for brewsterite

Sir David Brewster + English -ite

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