Stilbite-na
Stilbite-Na
A variety of Minerals
What is Stilbite-na?
Stilbite is the name of a series of tectosilicate minerals of the zeolite group. Prior to 1997, stilbite was recognized as a mineral species, but a reclassification in 1997 by the International Mineralogical Association changed it to a series name, with the mineral species being named: stilbite-Ca stilbite-Na Stilbite-Ca, by far the more common of the two, is a hydrous calcium sodium and aluminium silicate, NaCa4(Si27Al9)O72·28(H2O). In the case of stilbite-Na, sodium dominates over calcium. The species are visually indistinguishable, and the series name stilbite is still used whenever testing has not been performed.
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Stilbite-na Localities Map
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Quick Facts
Physical Properties
- Color
- White, colourless, red, light yellow, light to dark brown, cream
- Hardness (Mohs)
- 3.5 - 4
- Density
- 2.2 g/cm³
- Streak
- White
Chemical Properties
- Chemical Formula
- (Na,Ca,K)6-7[Al8Si28O72] · nH2O
- Elements
- Al, Ca, H, K, Na, O, Si

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