Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A white, pale pink, or pale green crystalline mineral, essentially KCa4Si8O20(F,OH)·8H2O.
from The Century Dictionary.
- noun A mineral allied to the zeolites, occurring in laminated masses or in tetragonal crystals, and having a strong pearly luster on the surface of perfect cleavage, parallel to which it separates readily into thin laminæ.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Min.) A mineral relating to the zeolites, usually occurring in square prisms or octahedrons with pearly luster on the cleavage surface. It is a hydrous silicate of calcium and potassium.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun mineralogy Any of several forms of a pale pink or green
mineral being a mixedfluoride andsilicate ofpotassium andcalcium .
Etymologies
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Examples
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Acid calcium silicates are represented in the mineral kingdom by gyrolite, H_2Ca_2 (SiO_3) _3·H_2O, a lime zeolite, sometimes regarded as an altered form of apophyllite
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary" Various
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And preserved inside a Victorian-style glass dome is a pearly lump of the mineral apophyllite, selected by Meitner as the closest solid representation of the unstable element
fbharjo commented on the word apophyllite
leaf out
September 10, 2011