name = Analcime
formula = NaAlSi2O6·H2O
color = White, colorless, gray, pink, greenish, yellowish
habit = Typically in crystals, usually trpezohedrons, also massive to granular.
system = Cubic; tetragonal, orthorhombic, or monoclinic, pseudocubic, with degree of ordering.
twinning = Polysynthetic on  , 
cleavage = Very poor 
fracture = Uneven to subconchoidal
mohs = 5 - 5.5
luster = Vitreous
refractive = n = 1.479 - 1.493
opticalprop = Isotropic; anomalously biaxial (-)
streak = white
gravity = 2.24 - 2.29
fusibility = 3.5
other = Weakly piezoelectric; weakly electrostatic when rubbed or heated.
references = [http://rruff.geo.arizona.edu/doclib/hom/analcime.pdf Mineral Data Publishing]
Analcime or analcite (from the Greek "analkimos" - "weak") is a white, grey, or colourless tectosilicate
mineral. Analcime consists of hydrated sodium aluminium silicatein cubic crystalline form. Its chemical formulais NaAlSi2O6·H2O. Minor amounts of potassium and calcium substitute for sodium. A silverbearing synthetic variety also exists (Ag-analcite).
Analcime is usually classified as a
zeolitemineral, but structurally and chemically it is more similar to the feldspathoids. Analcime occurs as a primary mineral in analcime basaltand other alkaline igneous rocks. It also occurs as cavity and vesicle fillings associated with prehnite, calcite, and zeolites.
Locations include the
Cyclopean Islandseast off Sicilyand near Trentinoin northern Italy; Victoria in Australia; Kerguelen Islandin the Indian Ocean; in the Lake Superiorcopper district of Michigan, Bergen Hill, New Jersey, Golden, Coloradoin the United States; and at Cape Blomidon, Nova Scotiaand Mont Saint-Hilaire, Quebecin Canada; and in Iceland.
List of minerals
* Hurlbut, Cornelius S.; Klein, Cornelis, 1985, Manual of Mineralogy, 20th ed., ISBN 0-471-80580-7
* [http://mineral.galleries.com/minerals/silicate/analcime/analcime.htm Mineral Galleries]
* [http://www.mindat.org/min-210.html Mindat.org]
* [http://webmineral.com/data/Analcime.shtml Webmineral.com]
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