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Chabazite-Ca

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Formula:
(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
System:
Triclinic
Colour:
Colourless, white, ...
Hardness:
4 - 5
Name:
Named in 1788 by Louis-Augustin Bosc d'Antic from the Greek chabazios, tune or melody, one of twenty stones named in the poem Peri lithos, which extolled the virtues of minerals. The poem is ascribed to Orpheus, legendary founder of the Orphic cult, which flourished in Greece in the early centuries. and its chemical composition.
The calcium-dominant member of the Chabazite series of the Zeolite Group.


Classification of Chabazite-Ca

Approved, 'Grandfathered' (first described prior to 1959)
9.GD.10

9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
D : Chains of 6-membered rings – tabular zeolites
77.1.2.1

77 : TECTOSILICATES Zeolites
1 : Zeolite group - True zeolites

Occurrences of Chabazite-Ca

Type Occurrence of Chabazite-Ca

Physical Properties of Chabazite-Ca

Vitreous
Diaphaneity (Transparency):
Transparent, Translucent
Colour:
Colourless, white, yellow, pink, red
Streak:
White
Hardness (Mohs):
4 - 5
Tenacity:
Brittle
Cleavage:
Distinct/Good
Distinct on {1011}
Fracture:
Irregular/Uneven
Density:
2.05 - 2.2 g/cm3 (Measured)    2.035 g/cm3 (Calculated)

Crystallography of Chabazite-Ca

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 9.425Å, b = 9.42Å, c = 9.42Å
α = 94.25°, β = 94.2°, γ = 94.25°
Ratio:
a:b:c = 1.001 : 1 : 1
Unit Cell Volume:
V 829.14 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Pseudorhombohedral crystals, tabular.
Twinning:
About [0001], interpenetrant, simple and repeated, common, contact on {1011}.
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 Chabazite-Ca

Type:
Biaxial (+/-)
RI values:
nα = 1.478 - 1.487 nβ = 1.480 - 1.490 nγ = 1.480 - 1.493
Max Birefringence:
δ = 0.002 - 0.006
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
none
Comments:
Or uniaxial, commonly shows birefringent panelling in six sections.

Chemical Properties of Chabazite-Ca

Formula:
(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
All elements listed in formula:

Relationship of Chabazite-Ca to other Species

Other Members of Group:
Chabazite-K(K2,Ca,Na2,Sr,Mg)2[Al2Si4O12]2 · 12H2O
Chabazite-Mg(Mg0.7K0.5Ca0.5Na0.1)[Al3Si9O24]·10H2O
Chabazite-Na(Na2,K2,Ca,Sr,Mg)2[Al2Si4O12]2 · 12H2O
Chabazite-SrSr2[Al2Si4O12]2 · 12H2O
Lévyne-Ca(Ca,Na2,K2)[Al2Si4O12] · 6H2O
Lévyne-Na(Na2,Ca,K2)[Al2Si4O12] · 6H2O
9.GD.05Gmelinite-CaCa2(Si8Al4O24] · 11H2O
9.GD.05Gmelinite-KK4(Si8Al4O24) · 11H2O
9.GD.05Gmelinite-NaNa4(Si8Al4O24] · 11H2O
9.GD.10WillhendersoniteKCa[Al3Si3O12] · 5H2O
9.GD.10Chabazite-K(K2,Ca,Na2,Sr,Mg)2[Al2Si4O12]2 · 12H2O
9.GD.10Chabazite-Na(Na2,K2,Ca,Sr,Mg)2[Al2Si4O12]2 · 12H2O
9.GD.10Chabazite-SrSr2[Al2Si4O12]2 · 12H2O
9.GD.10Chabazite-Mg(Mg0.7K0.5Ca0.5Na0.1)[Al3Si9O24]·10H2O
9.GD.15Lévyne-Ca(Ca,Na2,K2)[Al2Si4O12] · 6H2O
9.GD.15Lévyne-Na(Na2,Ca,K2)[Al2Si4O12] · 6H2O
9.GD.20Bellbergite(K,Ba,Sr)2Sr2Ca2(Ca,Na)4[Al3Si3O12]6 · 30H2O
9.GD.20Erionite-Ca(Ca,K2,Na2)2[Al4Si14O36] · 15H2O
9.GD.20Erionite-K(K2,Ca,Na2)2[Al4Si14O36] · 15H2O
9.GD.20Erionite-Na(Na2,K2,Ca)2[Al4Si14O36] · 15H2O
9.GD.25OffretiteKCaMg(Si13Al5)O36 · 15H2O
9.GD.25Wenkite(Ba,K)4(Ca,Na)6[(SO4)3|(Si,Al)20O39(OH)2] · 0.5H2O
9.GD.30Faujasite-Ca(Ca,Na2,Mg)3.5[Al7Si17O48] · 32H2O
9.GD.30Faujasite-Mg(Mg,Na2,Ca)3.5[Al7Si17O48] · 32H2O
9.GD.30Faujasite-Na(Na2,Ca,Mg)3.5[Al7Si17O48] · 32H2O
9.GD.35MaricopaitePb7Ca2(Si,Al)48O100 · 32H2O
9.GD.35Mordenite(Na2,Ca,K2)Al2Si10O24 · 7H2O
9.GD.40Dachiardite-Ca(Ca,Na2,K2)5Al10Si38O96 · 25H2O
9.GD.40Dachiardite-Na(Na2,Ca,K2)5Al10Si38O96 · 25H2O
9.GD.45EpistilbiteCaAl2Si6O16 · 5H2O
9.GD.50Ferrierite-K(K2,Na2,Mg,Ca)3-5Mg[Al5-7Si27.5-31O72] · 18H2O
9.GD.50Ferrierite-Mg(Mg,Na2,K2,Ca)3-5Mg[Al5-7Si27.5-31O72] · 18H2O
9.GD.50Ferrierite-Na(Na2,K2,Mg,Ca)3-5Mg[Al5-7Si27.5-31O72] · 18H2O
9.GD.55BikitaiteLiAlSi2O6 · H2O

Other Names for Chabazite-Ca

Name in Other Languages:
Simplified Chinese:钙斜沸石
Spanish:Chabasita-Ca

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 Chabazite-Ca

Reference List:
Bosc d’Antic, L.-A.-G. (1792): Mémoire sur la chabazie [sic]. Journal d’Histoire Naturelle, 2, 181-184.

Wiser, D.F. (1842): Glimmer, Stilbit, Diopsid, Cabazit, etc. Neues Jahrbuch für Mineralogie, Geognosie, Geologie und Petrefakten-Kunde, 1842, 217-226.

Smith, J. (1962): Crystal structures with a chabazite framework. I. Dehydrated Ca-chabazite. Acta Crystallographica, 15, 835-845.

Smith, J., Rinaldi, F., Glasser, L.S.D. (1963): Crystal structures with a chabazite framework. II. Hydrated Ca-chabazite at room temperature. Acta Crystallographica, 16, 45-53.

Passaglia, E. (1970): The crystal chemistry of chabazites. American Mineralogist, 55, 1278-1301.

Neues Jahrbuch für Mineralogie, Monatshefte (1983): 461-480.

Neuhoff, P.S., J.F. Stebbins, & D.K. Bird (2003): Si-Al disorder and solid solutions in analcime, chabazite, and wairakite. American Mineralogist, 88, 410-423.

Internet Links for Chabazite-Ca

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http://www.mindat.org/min-6854.html
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Specimens:
The following Chabazite-Ca specimens are currently listed for sale on minfind.com.

Localities for Chabazite-Ca

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Mineral and/or Locality  
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