Gmelinite-Na Mineral Data

Gmelinite-Na Mineral Data +

[Newest Minerals] [Minerals for Sale] [Educational Articles] [About Us] [Image Gallery]
John Betts - Fine Minerals
Classic minerals, out-of-print books & magazines, plus informative articles for collectors

General Gmelinite-Na Information

Chemical Formula:

(Na2,Ca)Al2Si4O12·6(H2O)

Composition:

Molecular Weight = 2,000.77 gm

Potassium 0.31 % K 0.38 % K₂O

Sodium 8.74 % Na 11.79 % Na₂O

Calcium 0.06 % Ca 0.08 % CaO

Aluminum 9.99 % Al 18.88 % Al₂O₃

Silicon 23.15 % Si 49.52 % SiO₂

Hydrogen 2.17 % H 19.36 % H₂O

Oxygen 55.58 % O

______ ______

100.00 % 100.01 % = TOTAL OXIDE

Empirical Formula:

Na_7.61Ca_0.03K_0.16Al_7.41Si_16.49O₄₈·21.5(H₂O)

Environment:

Alteration product of basalts.

IMA Status:

Valid Species (Pre-IMA) 1825

Locality:

Montecchio Maggiore, Vicenza, Italy. Link to MinDat.org Location Data.

Name Origin:

Named after the German mineralogist and chemist, Christian Gottlob Gmelin (1792-1860) of Turbingen, Germany. Na modifier added by the zeolite nomenclature committee.

Synonym:

Gmelinite

Gmelinite-Na Image

Images:

Gmelinite-Na

Comments: White crystalline aggregate of gmelinite.
Location: Antrim, Northern Ireland. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Gmelinite-Na Crystallography

Axial Ratios:

a:c = 1:0.73044

Cell Dimensions:

a = 13.756, c = 10.048, Z = 1; V = 1,646.63 Den(Calc)= 2.02

Crystal System:

Hexagonal - Dihexagonal DipyramidalH-M Symbol (6/m 2/m 2/m) Space Group: P 6₃/mmc

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

By Intensity(I/I_o): 4.1(1), 12.9(0.9), 2.96(0.8),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Sacerdoti M , Passaglia E , Carnevali R , Zeolites , 15 (1995) p.276-281, Structural refinements of Na-, K-, and Ca-exchanged gmelinites, Note: sample 1Na

Physical Properties of Gmelinite-Na

Cleavage:

[1010] Good, [0001] Parting

Color:

White, Reddish white, Pink, Greenish white, Flesh red.

Density:

2.03 - 2.17, Average = 2.09

Diaphaniety:

Transparent to translucent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

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

Habit:

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

Hardness:

4.5 - Between Fluorite and Apatite

Luster:

Vitreous - Dull

Streak:

white

Optical Properties of Gmelinite-Na

Gladstone-Dale:

CI meas= 0.009 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.03 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2382,KPDmeas= 0.2292,KC= 0.2312

Optical Data:

Uniaxial (+/-), a=1.474-1.481, b=1.476-1.494, bire=0.0020-0.0130.

Calculated Properties of Gmelinite-Na

Electron Density:

r_electron=2.13 gm/cc
note: r_Gmelinite-Na=2.10 gm/cc.

Fermion Index

Fermion Index = 0.01108
Boson Index = 0.98892

Photoelectric:

PE_Gmelinite-Na= 1.40 barns/electron
U=PE_Gmelinite-Na x r_electron= 2.98 barns/cc.

Radioactivity:

GRapi = 4.58 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Gmelinite-Na - barely detectable

Gmelinite-Na Classification

Dana Class:

77.1.2.6 (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.26-50 VIII - Silicates

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

VIII/J.26 - Zeolite group, Willhendersonite - Chabazite - Perialite series

VIII/J.26-10 Willhendersonite KCaAl3Si3O12·5(H2O) P1 1

VIII/J.26-20 Chabazite-Na! (Na2,K2,Ca,Mg)[Al2Si4O12]·6(H2O) R 3m 3 2/m

VIII/J.26-25 Chabazite-K! (K2,Ca,Na2,Mg)[Al2Si4O12]·6(H2O) R 3m 3 2/m

VIII/J.26-30 Chabazite-Ca (Ca0.5,Na,K)4[Al4Si8O24]·12H2O P1 1

VIII/J.26-35 Chabazite-Sr! (Sr,Ca,K2,Na2)[Al2Si4O12]·6(H2O) R 3m 3 2/m

VIII/J.26-40 Tschernichite (Ca,Na)(Si6Al2)O16·4-8(H2O) P 4/mmm 4/m 2/m 2/m

VIII/J.26-50 Gmelinite-Na (Na2,Ca)Al2Si4O12·6(H2O) P 6₃/mmc 6/m 2/m 2/m

VIII/J.26-52 Gmelinite-K! (K,Na,Ca)6(Al7Si17O48)·22(H2O) P 6₃/mmc 6/m 2/m 2/m

VIII/J.26-54 Gmelinite-Ca! (Ca,Na2)Al2Si4O12·6(H2O) P 6₃/mmc 6/m 2/m 2/m

VIII/J.26-58 Levyne-Na! (Na2,Ca,K2)Al2Si4O12·6(H2O) R 3m 3 2/m

VIII/J.26-60 Levyne-Ca (Ca,Na2,K2)Al2Si4O12·6(H2O) R 3m 3 2/m

VIII/J.26-70 Offretite (K2,Ca,Mg)2.5Al5Si13O36·15(H2O) P 6m2 6 m2

VIII/J.26-80 Mazzite K2CaMg2(Al,Si)36O72·28(H2O) P 6₃/mmc 6/m 2/m 2/m

VIII/J.26-90 Erionite-Na (Na2,K2,Ca)2[Al4Si14O36]·15(H2O) P 6₃/mmc 6/m 2/m 2/m

VIII/J.26-92 Erionite-K! (K2,Ca,Na2)2[Al4Si14O36]·15(H2O) P 6₃/mmc 6/m 2/m 2/m

VIII/J.26-94 Erionite-Ca! (Ca,K2,Na2)2[Al4Si14O36]·15(H2O) P 6₃/mmc 6/m 2/m 2/m

VIII/J.26-95 Bellbergite (K,Ba,Sr)2Sr2Ca2(Ca,Na)4Al18Si18O72·30(H2O) P 6₃/mmc, P 6₂c-, P 6₃mc Hex

VIII/J.26-100 Perlialite K8Tl4Al12Si24O72·20(H2O) P 6/mmm 6/m 2/m 2/m

Other Gmelinite-Na Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Gmelinite-Na :
1 - Alkali-Nuts(English) 2 - Alkali-Nuts(Francais) 3 -Am. Min. Crystal Structure Database 4 -Athena 5 - Crocoite.com Mineral Locations 6 -Google Images 7 -Google Scholar 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas

Search for Gmelinite-Na using:

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

Visit our Advertisers for Gmelinite-Na :
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 Gmelinite-Na Mineral Data :

Ask about Gmelinite-Na 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 Gmelinite-Na Specimen Label here :

Gmelinite-Na

(Na2,Ca)Al2Si4O12·6(H2O)
Dana No: 77.1.2.6 Strunz No: VIII/J.26-50
Locality:

Notes: