from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A monoclinic-prismatic mineral containing barium, fluorine, hydrogen, oxygen, silicon, sodium, strontium, and titanium.
from The Century Dictionary and Cyclopedia
- n. A mineral from the nephelite-syenite of Kola, Russian Lapland, related to astrophyllite in form, cleavage, and probably in composition.
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