Faujasite-Mg Mineral Data

Faujasite-Mg Mineral Data +

[Current Minerals] [Order Status] [Policies] [e-Bay Items]
B & L Minerals, Fine Mineral specimens for sale for collectors of all levels

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.

Search for Faujasite-Mg Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Faujasite-Mg Crystallography

Cell Dimensions:

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

Crystal System:

Isometric - HexoctahedralH-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

Diaphaniety:

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

Optical Data:

Isotropic, n=1.47-1.48.

Calculated Properties of Faujasite-Mg

Electron Density:

r_electron=1.98 gm/cc
note: r_Faujasite-Mg=1.93 gm/cc.

Fermion Index

Fermion Index = 0.01335
Boson Index = 0.98665

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Faujasite-Mg is Not Radioactive

Faujasite-Mg Classification

Dana Class:

77.1.2.7b (77)Tectosilicate Zeolite group

(77.1)true zeolites

(77.1.2)Chabazite and related species

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

77.1.2.1a Chabazite-Na! (Na2,K2,Ca,Mg)[Al2Si4O12]·6(H2O) R 3m 3 2/m

77.1.2.1b Chabazite-K! (K2,Ca,Na2,Mg)[Al2Si4O12]·6(H2O) R 3m 3 2/m

77.1.2.1c Chabazite-Sr! (Sr,Ca,K2,Na2)[Al2Si4O12]·6(H2O) R 3m 3 2/m

77.1.2.2 Herschelite? (Na,Ca,K)AlSi2O6·3(H2O) R 3m 3 2/m

77.1.2.3 Willhendersonite KCaAl3Si3O12·5(H2O) P1 1

77.1.2.4 Offretite (K2,Ca,Mg)2.5Al5Si13O36·15(H2O) P 6m2 6 m2

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

77.1.2.5a Erionite-K! (K2,Ca,Na2)2[Al4Si14O36]·15(H2O) P 6₃/mmc 6/m 2/m 2/m

77.1.2.5b Erionite-Ca! (Ca,K2,Na2)2[Al4Si14O36]·15(H2O) P 6₃/mmc 6/m 2/m 2/m

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

77.1.2.6a Gmelinite-Ca! (Ca,Na2)Al2Si4O12·6(H2O) P 6₃/mmc 6/m 2/m 2/m

77.1.2.6b Gmelinite-K! (K,Na,Ca)6(Al7Si17O48)·22(H2O) P 6₃/mmc 6/m 2/m 2/m

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

77.1.2.7a Faujasite-Ca! (Ca,Na2,Mg)3.5[Al7Si17O48]·32(H2O) F d3m 4/m 3 2/m

77.1.2.7b Faujasite-Mg ! (Mg,Na2,Ca)3.5[Al7Si17O48]·32(H2O) F d3m 4/m 3 2/m

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

77.1.2.8a Levyne-Na! (Na2,Ca,K2)Al2Si4O12·6(H2O) R 3m 3 2/m

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

Strunz Class:

VIII/J.27-44 VIII - Silicates

VIII/J - Tectosilicates (network), with zeolite-structure, Bladed Zeolites

VIII/J.27 - Zeolite group, Analcime - Paulingite series

VIII/J.27-10 Analcime NaAlSi2O6·(H2O) P1 1

VIII/J.27-20 Pollucite (Cs,Na)2Al2Si4O12·(H2O) I a3d 4/m 3 2/m

VIII/J.27-30 Wairakite CaAl2Si4O12·2(H2O) I2/a 2/m

VIII/J.27-40 Faujasite-Na (Na2,Ca,Mg)3.5[Al7Si17O48]·32(H2O) F d3m 4/m 3 2/m

VIII/J.27-44 Faujasite-Mg (Mg,Na2,Ca)3.5[Al7Si17O48]·32(H2O) F d3m 4/m 3 2/m

VIII/J.27-46 Faujasite-Ca! (Ca,Na2,Mg)3.5[Al7Si17O48]·32(H2O) F d3m 4/m 3 2/m

VIII/J.27-50 Paulingite-K (K2,Ca,Na2,Ba)5Al10Si35O90·45(H2O) Im3m 4/m 3 2/m

VIII/J.27-54 Paulingite-Ca! (Ca,K,Na,Ba)5[Al10Si35O84]·34(H2O) Im3m 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 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

Search for Faujasite-Mg using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Faujasite-Mg :
AA Mineral Specimens
B and L Minerals
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Faujasite-Mg Mineral Data :

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: 77.1.2.7b Strunz No: VIII/J.27-44
Locality:

Notes: