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bytownite

[ bahy-tou-nahyt ]
/ baɪˈtaʊ naɪt /
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noun

a blue to dark-gray mineral near the anorthite end of the plagioclase feldspar group.

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Origin of bytownite

1865–70; named after Bytown (old name of Ottawa, Canada), where first found; see -ite1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

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Scientific definitions for bytownite

bytownite
[ bī-tounīt ]

A bluish to dark gray triclinic mineral of the plagioclase feldspar group that contains a higher proportion of calcium than sodium. Bytownite occurs in alkaline igneous rocks. Chemical formula: (Ca,Na)(Si,Al)4O8.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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