from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A mineral in the zeolite family with composition Na2Al2Si3O10·2H2O.
from The Century Dictionary.
- noun A zeolitic mineral occurring in slender acicular crystals, also in masses with a fibrous and radiating structure, generally of a white color and transparent to translucent.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Min.) A zeolite occuring in groups of glassy acicular crystals, and in masses which often have a radiated structure. It is a hydrous silicate of alumina and soda.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun mineralogy A
fibrous zeolite mineral, being a sodium aluminosilicate, of the chemical formula Na2 Al2 Si3 O10·2H2O.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a group of minerals of the zeolite family consisting of a hydrous silicate of sodium and aluminum
from The American Heritage® Dictionary of the English Language, 4th Edition
Stilbite is characterized by its form, difficult gelatinizing, and intumescence before the blowpipe; from natrolite as mentioned under that species.
-- Small quantities of this beautiful mineral have been found in Shaft No. 2, in a small bed of but a few square feet in area, but quite thick and appearing much like natrolite.
The bed holding the upright crystals is also natrolite in confused matted masses.
Pectolite sometimes resembles some of the others, but may be readily distinguished by its _tough_ long fibers, not brittle like natrolite.
There is, however, a very fine vein of pectolite about twenty-five feet further east from the natrolite bed; it runs from the floor to ceiling, and is about two inches in thickness; some specimens of which I took from these were unusually unique in both size and appearance.
They form a large class of minerals of which Thomsonite and natrolite may be selected as examples --
It generally occurs in the form shown in Fig. 9, grouped very similarly to natrolite, and being right upon the rock or a thin bed of itself.
This natrolite is a grouping of very small but perfect crystals, having the forms shown in Fig. 5; they are from a quarter to an inch long, and, if not perfectly transparent, are of a pure white color; they may be readily recognized by their form, and occurring in this bed.
Ekkehardt furnishing an occasion for a visit to the Hohentwiel mountain in search of that golden-tinted natrolite mineral, which was duly found
On the atomic level deformations in the auxetic zeolite natrolite