Minerals

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General Information

Stilbite

Stilbite is a tecto-silicate mineral that belongs to the group of zeolite minerals. The chemical formula is complex, because it is made from many different elements. Many times a small part of the calcium is replaced by sodium.[1]

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Chemical & Physical Information

Trivial NameStilbite
Chemical NameCalcium Aluminum Silicate Tetrakaidecahydrate
Chemical FormulaCa2Al5Si13O36, 14H2O
Density2,15 g·cm-3
Molar mass?
Hardness3.5-4
Crytal systemMonoclinic
Unit cell?
Crystal habit?
FractureUneven
CleavagePerfect [010]
ColourWhite, red, yellow, brown or creamy.
LusterPearl
StreakWhite
OpacityTransparent to translucent
SafetySafe
Extra-
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Photos

Stilbite

(5 cm)

Stilbite

(3 cm)

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Sources

[1] Wikipedia

[2] Specimen from my personal collection, photo taken by me.