Chabazite-Sr Mineral Data

General Chabazite-Sr Information

Chemical Formula:

(Sr,Ca,K2,Na2)[Al2Si4O12]•6(H2O)

Composition:

Molecular Weight = 534.42 gm

Potassium 2.19 % K 2.64 % K₂O

Sodium 0.86 % Na 1.16 % Na₂O

Strontium 8.20 % Sr 9.69 % SrO

Calcium 3.75 % Ca 5.25 % CaO

Aluminum 11.61 % Al 21.94 % Al₂O₃

Silicon 18.92 % Si 40.47 % SiO₂

Hydrogen 2.07 % H 18.54 % H₂O

Oxygen 52.39 % O

______ ______

100.00 % 99.70 % = TOTAL OXIDE

Empirical Formula:

Sr_0.5Ca_0.5K_0.3Na_0.2Al_2.3Si_3.6O₁₂•5.5(H₂O)

Environment:

Associated with cavities in corroded analcime in an aegirine pegmatite. Sr-analogue of chabazite

IMA Status:

Approved IMA 1999, Dana # Added

Locality:

Suoluaiv Mountain, Lovozero alkaline massif, Kola Peninsula, Russia. 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-Sr + Pronunciation

Synonym:

IMA1999-040

Chabazite-Sr Crystallography

Axial Ratios:

a:c = 1:1.10025

Cell Dimensions:

a = 13.715, c = 15.09, Z = 6; V = 2,458.17 Den(Calc)= 2.17

Crystal System:

Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m

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

By Intensity(I/I_o): 2.92(1)(401), 9.38(0.8)(101), 1.697(0.7)(524,700,530),4.34(0.7)(211), 5.55(0.6)(021), 2.5(0.5),

Physical Properties of Chabazite-Sr

Cleavage:

{101} Distinct

Color:

Colorless, Yellowish white.

Density:

2.16

Diaphaneity:

Transparent

Fracture:

Brittle - Irregular - Very brittle fracture producing irregular fragments

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Hardness:

4-4.5 - Between Fluorite and Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Chabazite-Sr

Gladstone-Dale:

CI meas= -0.039 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.034 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2327,KPDmeas= 0.2338,KC= 0.2251
Ncalc = 1.49

Optical Data:

Uniaxial (+), w=1.503, e=1.507, bire=0.0040.

Calculated Properties of Chabazite-Sr

Electron Density:

Bulk Density (Electron Density)=2.18 gm/cc
note: Specific Gravity of Chabazite-Sr =2.17 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Chabazite-Sr= 10.44 barns/electron
U=PE_Chabazite-Sr x r_electron= 22.74 barns/cc.

Radioactivity:

GRapi = 31.78 (Gamma Ray American Petroleum Institute Units)
Concentration of Chabazite-Sr per GRapi unit = 3.15 (%)

Estimated Radioactivity from Chabazite-Sr - barely detectable

Chabazite-Sr Classification

Dana Class:

77.01.02.01c (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 ï¿½ 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-Sr Information

References:

NAME( AmMin, v 86, p 939) PHYS. PROP.(AmMin, v 86, p 939) OPTIC PROP.(AmMin, v 86, p939)

See Also:

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

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Chabazite-Sr

(Sr,Ca,K2,Na2)[Al2Si4O12]•6(H2O)
Dana No: 77.01.02.01c Strunz No: 09.GD.10
Locality:

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