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Stilbite

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Colour:
White
Hardness:
3½ - 4
Name:
Named in 1797 by Jean Claude de la Métherie from Greek στιλβη "stilbein", to glitter of shine, or "stilbe", a mirror, alluding to its pearly or vitreous luster. Originally, but inconsistently called zeolite in 1756 by Axel Cronstedt. Named crystalii ad centrum tendentes in 1758 by Cronstedt. In 1772, Johan Gottschalk Wallerius called this mineral zeolite selenitica lamellaris. Also in 1797, de la Métherie called this mineral zeolite nacrée. Werner (1780) called this mineral strehliger zeolith. Rene Just Haüy (1801) used the term stilbite anamorphique for a mineral now recognized as heulandite. Desmine was introduced in 1818 by Johann Friedrich August Breithaupt. Sphaerostilbite was used in 1832 by François Sulpice Beudant. Additional varietal names and synonyms have been proposed: blättricher zeolit, hypostilbite, puflerite, radiated zeolite, and syhedrite.
This name now refers to the minerals Stilbite-Ca and Stilbite-Na.
Stilbite is easily confused with stellerite.

Classification of Stilbite

16.10.21

16 : Silicates Containing Aluminum and other Metals
10 : Aluminosilicates of Ca and alkalis
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Physical Properties of Stilbite

Vitreous, Pearly
Colour:
White
Streak:
White
Hardness (Mohs):
3½ - 4
Density:
2.18 - 2.2 g/cm3 (Measured)    2.23 g/cm3 (Calculated)

Crystallographic forms of Stilbite

Crystal Atlas:
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Stilbite no.1 - Goldschmidt (1913-1926)
Stilbite no.6 - Goldschmidt (1913-1926)
3d models and HTML5 code kindly provided by www.smorf.nl.

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Optical Data of Stilbite

Type:
Biaxial (-)
RI values:
nα = 1.479 - 1.492 nβ = 1.485 - 1.500 nγ = 1.489 - 1.505
2V:
Measured: 22° to 79°, Calculated: 76° to 78°
Max Birefringence:
δ = 0.010 - 0.013
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
weak

Relationship of Stilbite to other Species

16.10.1Bytownite(Ca,Na)[Al(Al,Si)Si2O8]
16.10.2LisetiteCaNa2Al4Si4O16
16.10.4Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
16.10.5Gonnardite(Na,Ca)2(Si,Al)5O10 · 3H2O
16.10.6MesoliteNa2Ca2Si9Al6O30 · 8H2O
16.10.7Faujasite
16.10.8Garronite-CaNa2Ca5Al12Si20O64 · 27H2O
16.10.9BoggsiteCa8Na3(Si,Al)96O192 · 70H2O
16.10.10Herschelite
16.10.11Phillipsite
16.10.12Fedorite(Na,K)2-3(Ca4Na3)Si16O38(OH,F)2 · 3.5H2O
16.10.13WillhendersoniteKCa[Al3Si3O12] · 5H2O
16.10.14Barrerite(Na,K,Ca0.5)2[Al2Si7O18] · 7H2O
16.10.15Mordenite(Na2,Ca,K2)Al2Si10O24 · 7H2O
16.10.16Reyerite(Na,K)2Ca14(Si,Al)24O58(OH)8 · 6H2O
16.10.17Lévyne
16.10.18Clinoptilolite
16.10.19Heulandite
16.10.20GobbinsiteNa5(Si11Al5)O32 · 11H2O
16.10.22Dachiardite
16.10.23OffretiteKCaMg(Si13Al5)O36 · 15H2O
16.10.24PerlialiteK9Na(Ca,Sr)[Al2Si4O12]6 · 15H2O
16.10.25Erionite
16.10.26Paulingite
16.10.27Sodium Dachiardite(Na2,Ca,K2)4-5Al8Si40O96 · 26H2O
16.10.28Mazzite-Mg(Mg,K,Ca)5(Si26Al10)O72 · 28H2O
16.10.29RoggianiteCa2Be(OH)2Al2Si4O13 · 2.5H2O

Other Names for Stilbite

Name in Other Languages:
Catalan:Estilbita
Danish:Stilbit
Dutch:Stilbiet
Hungarian:Dezmin
Japanese:束沸石
Polish:Stilbit
Simplified Chinese:辉沸石
Ukrainian:Десмін

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Stilbite

Reference List:
Haüy, R.J. (1796): Journal des mines, 5, 276.

Pabst, A. (1939): The relation of stellerite and epidesmine to stilbite. Mineralogical Magazine 25, 271-276. [Abstract in: American Mieralogist 24, 63 (1939)]

Slaughter, M. (1970): Crystal structure of stilbite. American Mineralogist 55, 387-397.

Cruciani, G., G. Artioli, A. Gualtieri, K. Stahl, and J.C. Hanson (1997): Dehydration dynamics of stilbite using synchrotron X-ray powder diffraction. American Mineralogist 82, 729-739.

Internet Links for Stilbite

Specimens:
The following Stilbite specimens are currently listed for sale on minfind.com.

Localities for Stilbite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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