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NaCa4[Al9Si27O72] · nH2O
White, colourless, red, ...
Vitreous, Pearly
3½ - 4
Member of:
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. Chemical suffixes were added by the IMA.
Zeolite Group.

See also the chemically similar Stellerite and Stilbite-Na.
Note: stilbite-Ca and stilbite-Na are monoclinic, in contrast to the chemically similar Stellerite, which is orthorhombic.

Classification of Stilbite-Ca


9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
E : Chains of T10O20 Tetrahedra
Dana 7th ed.:

1 : Zeolite group - True zeolites URL:
Please feel free to link to this page.

Occurrences of Stilbite-Ca

Geological Setting:
A low temperature hydrothermal mineral, in amygdules and cavities in basalt.

Physical Properties of Stilbite-Ca

Vitreous, Pearly
Diaphaneity (Transparency):
Transparent, Translucent
Pearly on cleavage
White, colourless, red, light yellow, light to dark brown, cream, orange, pink
Hardness (Mohs):
3½ - 4
on {010}
2.19(1) g/cm3 (Measured)    2.23 g/cm3 (Calculated)

Crystallography of Stilbite-Ca

Crystal System:
Class (H-M):
2/m - Prismatic
Space Group:
Cell Parameters:
a = 13.63Å, b = 18.17Å, c = 11.31Å
β = 129.166°
a:b:c = 0.75 : 1 : 0.622
Unit Cell Volume:
V 2,171.67 ų (Calculated from Unit Cell)
Typically thin tabular, sheaflike or globular clusters
Ubiquitous on {001}, cruciform and penetration.
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Stilbite-Ca

Biaxial (-)
RI values:
nα = 1.484 - 1.500 nβ = 1.492 - 1.507 nγ = 1.494 - 1.513
Measured: 30° to 49°, 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:
r < v

Chemical Properties of Stilbite-Ca

NaCa4[Al9Si27O72] · nH2O
All elements listed in formula:

Relationship of Stilbite-Ca to other Species

Member of:
Other Members of Group:
AlflarseniteNaCa2Be3Si4O13(OH) · 2H2O
AmiciteK2Na2Al4Si4O16 · 5H2O
AnalcimeNa2(Al2Si4O12) · 2H2O
Barrerite(Na,K,Ca0.5)2[Al2Si7O18] · 7H2O
Beaumontite (of Lévy)
Bellbergite(K,Ba,Sr)2Sr2Ca2(Ca,Na)4[Al3Si3O12]6 · 30H2O
BikitaiteLiAlSi2O6 · H2O
BoggsiteCa8Na3(Si,Al)96O192 · 70H2O
Brewsterite-Ba(Ba,Sr)[Al2Si6O16] · 5H2O
Brewsterite-Sr(Sr,Ba,Ca)[Al2Si6O16] · 5H2O
Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Chabazite-K(K2,Ca,Na2,Sr,Mg)2[Al2Si4O12]2 · 12H2O
Chabazite-Levyne Subgroup
Chabazite-Na(Na2,K2,Ca,Sr,Mg)2[Al2Si4O12]2 · 12H2O
Chabazite-SrSr2[Al2Si4O12]2 · 12H2O
ChiavenniteCaMnBe2Si5O13(OH)2 · 2H2O
Clinoptilolite-Ca(Ca,Na,K)2-3Al3(Al,Si)2Si13O36 · 12H2O
Clinoptilolite-K(K,Na,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O
Clinoptilolite-Na(Na,K,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O
CowlesiteCaAl2Si3O10 · 6H2O
Dachiardite-Ca(Ca,Na2,K2)5Al10Si38O96 · 25H2O
Dachiardite-Na(Na2,Ca,K2)5Al10Si38O96 · 25H2O
DirenzoiteNaK6MgCa2(Al13Si47O120) · 36H2O
EdingtoniteBa[Al2Si3O10] · 4H2O
EpistilbiteCaAl2Si6O16 · 5H2O
Erionite-Ca(Ca,K2,Na2)2[Al4Si14O36] · 15H2O
Erionite-K(K2,Ca,Na2)2[Al4Si14O36] · 15H2O
Erionite-Na(Na2,K2,Ca)2[Al4Si14O36] · 15H2O
Faujasite Subgroup
Faujasite-Ca(Ca,Na2,Mg)3.5[Al7Si17O48] · 32H2O
Faujasite-Mg(Mg,Na2,Ca)3.5[Al7Si17O48] · 32H2O
Faujasite-Na(Na2,Ca,Mg)3.5[Al7Si17O48] · 32H2O
Ferrierite-K(K2,Na2,Mg,Ca)3-5Mg[Al5-7Si27.5-31O72] · 18H2O
Ferrierite-Mg(Mg,Na2,K2,Ca)3-5Mg[Al5-7Si27.5-31O72] · 18H2O
Ferrierite-Na(Na2,K2,Mg,Ca)3-5Mg[Al5-7Si27.5-31O72] · 18H2O
FerrochiavenniteCa1-2Fe[(Si,Al,Be)5Be2O13(OH)2] · 2H2O
Flörkeite(K3Ca2Na)[Al8Si8O32] · 12H2O
Garronite-CaNa2Ca5Al12Si20O64 · 27H2O
GaultiteNa4Zn2Si7O18 · 5H2O
Gismondine-BaBa2Al4Si4O16 · 4-6H2O
Gismondine-CaCaAl2Si2O8 · 4H2O
Gmelinite-CaCa2(Si8Al4O24] · 11H2O
Gmelinite-KK4(Si8Al4O24) · 11H2O
Gmelinite-NaNa4(Si8Al4O24] · 11H2O
GobbinsiteNa5(Si11Al5)O32 · 11H2O
Gonnardite(Na,Ca)2(Si,Al)5O10 · 3H2O
GoosecreekiteCa[Al2Si6O16] · 5H2O
GottardiiteNa3Mg3Ca5Al19Si117O272 · 93H2O
Harmotome(Ba0.5,Ca0.5,K,Na)5[Al5Si11O32] · 12H2O
Heulandite-Ba(Ba,Ca,K,Na,Sr)5Al9Si27O72 · 22H2O
Heulandite-Ca(Ca,Na)2-3Al3(Al,Si)2Si13O36 · 12H2O
Heulandite-K(K,Na,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O
Heulandite-Na(Na,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O
Heulandite-Sr(Sr,Na,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O
LaumontiteCaAl2Si4O12 · 4H2O
Lévyne-Ca(Ca,Na2,K2)[Al2Si4O12] · 6H2O
Lévyne-Na(Na2,Ca,K2)[Al2Si4O12] · 6H2O
LovdariteK2Na6Be4Si14O36 · 9H2O
MaricopaitePb7Ca2(Si,Al)48O100 · 32H2O
Mazzite-Mg(Mg,K,Ca)5(Si26Al10)O72 · 28H2O
Mazzite-NaNa8[Al4Si14O36]2 · 30H2O
Merlinoite(K,Na)5(Ca,Ba)2Al9Si23O64 · 23H2O
MesoliteNa2Ca2Si9Al6O30 · 8H2O
Montesommaite(K,Na)9Al9Si23O64 · 10H2O
Mordenite(Na2,Ca,K2)Al2Si10O24 · 7H2O
MutinaiteNa3Ca4Si85Al11O192 · 60H2O
NabesiteNa2BeSi4O10 · 4H2O
NatroliteNa2Al2Si3O10 · 2H2O
Natrolite Subgroup
OffretiteKCaMg(Si13Al5)O36 · 15H2O
PahasapaiteLi8(Ca,Li,K)10.5Be24(PO4)24 · 38H2O
ParanatroliteNa2Al2Si3O10 · 3H2O
ParthéiteCa2(Si4Al4) O15 (OH)2•4H2O
Paulingite-Ca(Ca,K,Na,Ba,◻)10 (Si, Al)42O84•34H2O
Paulingite-K(K2,Ca,Na2,Ba)5[Al10Si35O90] · 45H2O
Paulingite-Na(Na2,K2,Ca,Ba)5[Al10Si35O90] · 45H2O
PerlialiteK9Na(Ca,Sr)[Al2Si4O12]6 · 15H2O
Phillipsite-Ca(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32 . 12H2O
Phillipsite-K(K,Na,Ca0.5,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Phillipsite-Na(Na,K,Ca0.5,Ba0.5)4-7[Al4-7Si12-9O32] · 12H2O
Pollucite(Cs,Na)2(Al2Si4O12) · 2H2O
RoggianiteCa2Be(OH)2Al2Si4O13 · 2.5H2O
ScoleciteCaAl2Si3O10 · 3H2O
StelleriteCa4(Si28Al8)O72 · 28H2O
Stilbite-Na(Na,Ca,K)6-7[Al8Si28O72] · nH2O
Terranovaite(Na,Ca)8(Si68Al12)O160 · 29H2O
Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Thomsonite-SrNa(Sr,Ca)2[Al5Si5O20] · 7H2O
Tschernichite(Ca,Na2)[Al2Si4O12] · 4-8H2O
TschörtneriteCa4(Ca,Sr,K,Ba)3Cu3[(OH)2|Al3Si3O12]4 · nH2O
WairakiteCa(Al2Si4O12) · 2H2O
WeinebeneiteCaBe3(PO4)2(OH)2 · 4H2O
Wenkite(Ba,K)4(Ca,Na)6[(SO4)3|(Si,Al)20O39(OH)2] · 0.5H2O
WillhendersoniteKCa[Al3Si3O12] · 5H2O
YugawaraliteCaAl2Si6O16 · 4H2O
9.GE.05Clinoptilolite-Ca(Ca,Na,K)2-3Al3(Al,Si)2Si13O36 · 12H2O
9.GE.05Clinoptilolite-K(K,Na,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O
9.GE.05Clinoptilolite-Na(Na,K,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O
9.GE.05Heulandite-Ca(Ca,Na)2-3Al3(Al,Si)2Si13O36 · 12H2O
9.GE.05Heulandite-K(K,Na,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O
9.GE.05Heulandite-Na(Na,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O
9.GE.05Heulandite-Sr(Sr,Na,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O
9.GE.05Heulandite-Ba(Ba,Ca,K,Na,Sr)5Al9Si27O72 · 22H2O
9.GE.10Stilbite-Na(Na,Ca,K)6-7[Al8Si28O72] · nH2O
9.GE.15Barrerite(Na,K,Ca0.5)2[Al2Si7O18] · 7H2O
9.GE.15StelleriteCa4(Si28Al8)O72 · 28H2O
9.GE.20Brewsterite-Ba(Ba,Sr)[Al2Si6O16] · 5H2O
9.GE.20Brewsterite-Sr(Sr,Ba,Ca)[Al2Si6O16] · 5H2O,Na)2-3Al3(Al,Si)2Si13O36 · 12H2O,Na,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O,Na,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O,Ca,K)6-7[Al8Si28O72] · nH2O,K,Ca0.5)2[Al2Si7O18] · 7H2O

Other Names for Stilbite-Ca

Name in Other Languages:

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-Ca

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

Cruciani, G., G. Artioli, A. Gualtieri: Acta Crystallographica: B27: 833-841.

Bulletin de Mineralogie: 101: 368-375.

European Journal of Mineralogy (1993): 5: 839.

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

Internet Links for Stilbite-Ca

Localities for Stilbite-Ca

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