Faujasite-Mg Mineral Data

General Faujasite-Mg Information

Chemical Formula:

(Mg,Na2,Ca)3.5[Al7Si17O48]•32(H2O)

Composition:

Molecular Weight = 2,099.99 gm

Sodium 1.15 % Na 1.55 % Na₂O

Calcium 0.67 % Ca 0.93 % CaO

Magnesium 2.43 % Mg 4.03 % MgO

Aluminum 8.99 % Al 16.99 % Al₂O₃

Silicon 22.74 % Si 48.64 % SiO₂

Hydrogen 3.07 % H 27.45 % H₂O

Oxygen 60.95 % O

______ ______

100.00 % 99.60 % = TOTAL OXIDE

Empirical Formula:

3.5(Mg_0.6)3.5(Na_0.3)3.5(Ca_0.1)Al₇Si₁₇O₄₈•32(H₂O)

Environment:

Usually occurs in basaltic volcanics, metapyroxenite, also with augite in limburgite.

IMA Status:

Approved IMA 1998 (Dana # Added)

Locality:

Sasback in the Kaiserstuhl, Baden, Germany. Link to MinDat.org Location Data.

Name Origin:

Named after Barthelemy Faujas de Saint Fond (1741-1819), French geologist and writer on the origin of volcanoes. The Mg-dominant member of the faujasite series.

Name Pronunciation:

Faujasite-Mg + Pronunciation

Faujasite-Mg Image

Images:

Faujasite-Mg

Comments: Colorless octahedra of faujasite-Mg in basalt vesicles.
Location: Limburg Quarries, Sasbach, Kaiserstuhl, Baden-Wurttemberg, Germany. Scale: See Image.
© Rruff Database

Faujasite-Mg Crystallography

Cell Dimensions:

a = 24.7, Z = 8; V = 15,069.22 Den(Calc)= 1.85

Crystal System:

Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m

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

By Intensity(I/I_o): 3.76(1), 5.66(1), 14.3(1),

Physical Properties of Faujasite-Mg

Cleavage:

{111} Perfect, {111} Perfect, {111} Perfect

Color:

Colorless, White, Pale brown.

Density:

1.923 - 1.94, Average = 1.93

Diaphaneity:

Transparent to translucent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Crystalline - Coarse - Occurs as well-formed coarse sized crystals.

Hardness:

5 - Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Faujasite-Mg

Gladstone-Dale:

CI meas= -0.013 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.058 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2568,KPDmeas= 0.2459,KC= 0.2427
Ncalc = 1.45 - 1.47

Optical Data:

Isotropic, n=1.47-1.48.

Calculated Properties of Faujasite-Mg

Electron Density:

Bulk Density (Electron Density)=1.98 gm/cc
note: Specific Gravity of Faujasite-Mg =1.93 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Faujasite-Mg= 1.36 barns/electron
U=PE_Faujasite-Mg x rElectron Density= 2.69 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Faujasite-Mg is Not Radioactive

Faujasite-Mg Classification

Dana Class:

77.01.02.07b (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.30 09 - SILICATES (Germanates)

09.G - Tektosilicates with Zeolitic H2O

09.GD -Chains of 6-membered rings ï¿½ tabular zeolites

09.GD.30 Faujasite-Ca! (Ca,Na2,Mg)3.5[Al7Si17O48]•32(H2O) F d3m 4/m 3 2/m

09.GD.30 Faujasite-Mg! (Mg,Na2,Ca)3.5[Al7Si17O48]•32(H2O) F d3m 4/m 3 2/m

09.GD.30 Faujasite-Na (Na2,Ca,Mg)3.5[Al7Si17O48]•32(H2O) F d3m 4/m 3 2/m

Other Faujasite-Mg Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Faujasite-Mg :
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

Search for Faujasite-Mg using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Faujasite-Mg :

Ask about Faujasite-Mg here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Faujasite-Mg Specimen Label here :

Faujasite-Mg

(Mg,Na2,Ca)3.5[Al7Si17O48]•32(H2O)
Dana No: 77.01.02.07b Strunz No: 09.GD.30
Locality:

Notes:

Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.