Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A blue to dark-gray variety of plagioclase feldspar that contains a higher proportion of calcium than sodium and occurs in alkaline igneous rocks.
from The Century Dictionary.
- noun A kind of feldspar from Bytown (now Ottawa), Canada, intermediate between anorthite and labradorite.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun mineralogy A
plagioclase feldspar , the fifth member of the Albite-Anorthitesolid solution series. Bytownite is rare, and normally occurs in small grains in lime-richigneous rocks . Clear pale yellowcrystals have come from Mexico and Oregon.
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
[After Bytown, former name of Ottawa, Ontario, near where a sample of the mineral was found.]
from Wiktionary, Creative Commons Attribution/Share-Alike License
Bytown + -ite, named for the type locality in Bytown, Canada, but this locality was later discredited. The name, however, was kept.
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Examples
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Isolated crystals of bytownite bounded by well-defined faces are unknown.
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary" Various
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