Chabazite-Ca Mineral Data

General Chabazite-Ca Information

Chemical Formula:

(Ca0.5,Na,K)4[Al4Si8O24]•12H2O

Composition:

Molecular Weight = 1,039.07 gm

Potassium 0.75 % K 0.91 % K₂O

Sodium 0.07 % Na 0.09 % Na₂O

Strontium 0.25 % Sr 0.30 % SrO

Calcium 7.17 % Ca 10.04 % CaO

Magnesium 0.05 % Mg 0.08 % MgO

Aluminum 10.23 % Al 19.33 % Al₂O₃

Silicon 21.70 % Si 46.43 % SiO₂

Hydrogen 2.55 % H 22.82 % H₂O

Oxygen 57.22 % O

______ ______

100.00 % 99.99 % = TOTAL OXIDE

Empirical Formula:

Ca_1.86Na_0.03K_0.2Mg_0.02Sr_0.03Al_3.94Si_8.03O₂₄•13.16(H₂O)

Environment:

Amygdaloidal cavities of basalt and related rocks. Renamed chabazite-Ca by IMA zeolite committee.

IMA Status:

Valid Species (Pre-IMA) 1792

Locality:

Col de Lares, Val di Fassa, Italy. Link to MinDat.org Location Data.

Name Origin:

From Gk. 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

Name Pronunciation:

Chabazite-Ca + Pronunciation

Synonym:

Acadialite

Adipite

Chabazite

Chabazite-Ca Image

Images:

Chabazite-Ca

Comments: Colorless hexagonal plates of chabazite.
Location: Boral quarry, Bundoora, Victoria, Australia. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Images:

Chabazite-Ca

Comments: Twinned, white, blocky crystals of chabazite on basalt matrix.
Location: Richmond, Melbourne, Victoria, Australia. Scale: 7x6x2 cm.
© John Betts - Fine Minerals

Images:

Chabazite-Ca

Comments: Pinkish orange colored chabazite-Ca displaying a blocky, near-cubic form of triclinic crystals.
Location: Imilchil, Anti-Atlas Morocco. Scale: 4.2 x 3.7 x 1.6 cm.
© Fabre Minerals

Chabazite-Ca Crystallography

Axial Ratios:

a:b:c =1.001:1:0.9957

Cell Dimensions:

a = 9.45, b = 9.44, c = 9.4, Z = 1; alpha = 91.18°, beta = 94.08°, gamma = 94.07° V = 834.14 Den(Calc)= 2.07

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.925(1), 4.32(0.75), 9.35(0.5),2.89(0.3), 3.87(0.3), 5.02(0.3), 3.59(0.25),

Crystal Structure:

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Mazzi F , Galli E , Neues Jahrbuch fur Mineralogie, Monatshefte , 1983 (1983) p.461-480, The tetrahedral framework of chabazite, Locality: Wasson s Bluff, Two Island, Nova Scotia, Canada, Note: Occupancies invented to match formula and refinement, Sample: C 1a, trigonal refinement

View Additional jPOWD Structure files for Chabazite-Ca
[1] [2]

Physical Properties of Chabazite-Ca

Cleavage:

{1011} Imperfect

Color:

Colorless, Green, Yellow, White, Pink.

Density:

2.05 - 2.15, Average = 2.09

Diaphaneity:

Translucent to transparent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Druse - Crystal growth in a cavity which results in numerous crystal tipped surfaces.

Habit:

Pseudo Cubic - Crystals show a cubic outline.

Hardness:

4 - Fluorite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Chabazite-Ca

Gladstone-Dale:

CI meas= 0.031 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.017 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2337,KPDmeas= 0.2304,KC= 0.2378
Ncalc = 1.49 - 1.51

Optical Data:

Biaxial (+/-), a=1.478-1.485, b=1.48-1.4895, g=1.48-1.49, bire=0.0020-0.0050, 2V(Calc)=0-36, 2V(Meas)=0-32. Dispersion none.

Calculated Properties of Chabazite-Ca

Electron Density:

Bulk Density (Electron Density)=2.11 gm/cc
note: Specific Gravity of Chabazite-Ca =2.07 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Chabazite-Ca= 2.39 barns/electron
U=PE_Chabazite-Ca x r_electron= 5.04 barns/cc.

Radioactivity:

GRapi = 11.07 (Gamma Ray American Petroleum Institute Units)
Concentration of Chabazite-Ca per GRapi unit = 9.03 (%)

Estimated Radioactivity from Chabazite-Ca - barely detectable

Chabazite-Ca Classification

Dana Class:

77.01.02.01 (77)Tectosilicate Zeolite group

(77.01)true zeolites

(77.01.02)Chabazite and related species

77.01.02.01 Chabazite-Ca (Ca0.5,Na,K)4[Al4Si8O24]•12H2O P1 1

77.01.02.01a Chabazite-Na! (Na2,K2,Ca,Mg)[Al2Si4O12]•6(H2O) R 3m 3 2/m

77.01.02.01b Chabazite-K! (K2,Ca,Na2,Mg)[Al2Si4O12]•6(H2O) R 3m 3 2/m

77.01.02.01c Chabazite-Sr! (Sr,Ca,K2,Na2)[Al2Si4O12]•6(H2O) R 3m 3 2/m

77.01.02.02 Herschelite? (Na,Ca,K)AlSi2O6•3(H2O) R 3m 3 2/m

77.01.02.03 Willhendersonite KCaAl3Si3O12•5(H2O) P1 1

77.01.02.04 Offretite (K2,Ca,Mg)2.5Al5Si13O36•15(H2O) P 6m2 6 m2

77.01.02.05 Erionite-Na (Na2,K2,Ca)2[Al4Si14O36]•15(H2O) P 6₃/mmc 6/m 2/m 2/m

77.01.02.05a Erionite-K! (K2,Ca,Na2)2[Al4Si14O36]•15(H2O) P 6₃/mmc 6/m 2/m 2/m

77.01.02.05b Erionite-Ca! (Ca,K2,Na2)2[Al4Si14O36]•15(H2O) P 6₃/mmc 6/m 2/m 2/m

77.01.02.06 Gmelinite-Na (Na2,Ca)Al2Si4O12•6(H2O) P 6₃/mmc 6/m 2/m 2/m

77.01.02.06a Gmelinite-Ca! (Ca,Na2)Al2Si4O12•6(H2O) P 6₃/mmc 6/m 2/m 2/m

77.01.02.06b Gmelinite-K! (K,Na,Ca)6(Al7Si17O48)•22(H2O) P 6₃/mmc 6/m 2/m 2/m

77.01.02.07 Faujasite-Na (Na2,Ca,Mg)3.5[Al7Si17O48]•32(H2O) F d3m 4/m 3 2/m

77.01.02.07a Faujasite-Ca! (Ca,Na2,Mg)3.5[Al7Si17O48]•32(H2O) F d3m 4/m 3 2/m

77.01.02.07b Faujasite-Mg! (Mg,Na2,Ca)3.5[Al7Si17O48]•32(H2O) F d3m 4/m 3 2/m

77.01.02.08 Levyne-Ca (Ca,Na2,K2)Al2Si4O12•6(H2O) R 3m 3 2/m

77.01.02.08a Levyne-Na! (Na2,Ca,K2)Al2Si4O12•6(H2O) R 3m 3 2/m

77.01.02.09 Tschortnerite! Ca4(Ca,Sr,K,Ba)3Cu3(OH)8[Si12Al12O48]•x(H2O),x>=20 F m3m 4/m 3 2/m

Strunz Class:

09.GD.10 09 - SILICATES (Germanates)

09.G - Tektosilicates with Zeolitic H2O

09.GD -Chains of 6-membered rings – tabular zeolites

09.GD.10 Chabazite-K! (K2,Ca,Na2,Mg)[Al2Si4O12]•6(H2O) R 3m 3 2/m

09.GD.10 Chabazite-Ca (Ca0.5,Na,K)4[Al4Si8O24]•12H2O P1 1

09.GD.10 Chabazite-Na! (Na2,K2,Ca,Mg)[Al2Si4O12]•6(H2O) R 3m 3 2/m

09.GD.10 Herschelite? (Na,Ca,K)AlSi2O6•3(H2O) R 3m 3 2/m

09.GD.10 Chabazite-Sr! (Sr,Ca,K2,Na2)[Al2Si4O12]•6(H2O) R 3m 3 2/m

09.GD.10 Willhendersonite KCaAl3Si3O12•5(H2O) P1 1

Other Chabazite-Ca Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(Heinrich65)

See Also:

Links to other databases for Chabazite-Ca :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Print or Cut-and-Paste your Chabazite-Ca Specimen Label here :

Chabazite-Ca

(Ca0.5,Na,K)4[Al4Si8O24]•12H2O
Dana No: 77.01.02.01 Strunz No: 09.GD.10
Locality:

Notes: