Mineralogy Database

Erionite-Na Mineral Data

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General Erionite-Na Information

Help on Chemical  Formula: Chemical Formula: (Na2,K2,Ca)2[Al4Si14O36]•15(H2O)
Help on Composition: Composition: Molecular Weight = 2,809.97 gm
   Potassium   2.78 %  K     3.35 % K2O
   Sodium      4.57 %  Na    6.16 % Na2O
   Calcium     0.16 %  Ca    0.22 % CaO
   Magnesium   0.16 %  Mg    0.26 % MgO
   Aluminum    7.27 %  Al   13.73 % Al2O3
   Iron        0.04 %  Fe    0.05 % FeO
   Silicon    28.26 %  Si   60.45 % SiO2
   Hydrogen    1.76 %  H    15.77 % H2O
   Oxygen     55.00 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na5.59K2Ca0.11Mg0.18Fe2+0.02Al7.57Si28.27O72�24.6(H2O)
Help on Environment: Environment: Occurs in volcanic and sedimentary rocks. Common in altered silicic tuff., especially in saline lacustrine deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1898
Help on Locality: Locality: Durkee opal mine, Suayze Creek, near Durkee, Baker Co., Oregon, USA. Proposed new type-example: Cady Mountains, California. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek for wool, in allusion to its white, fibrous, wool-like appearance. Na modifier added by zeolite nomenclatrue committee.
Help on Name Pronunciation: Name Pronunciation: Erionite-Na Say ERIONITE-NA
 

Erionite-Na Image

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  Erionite-Na

Comments: White to pale green radiating erionite.
Location: Shurdo, Caucasus Mountains, Georgia, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Erionite-Na Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.13913
Help on Cell Dimensions: Cell Dimensions: a = 13.21, c = 15.048, Z = 1; V = 2,274.13 Den(Calc)= 2.05
Help on Crystal System: Crystal System: Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 63/mmc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 11.41(1), 6.61(0.73), 4.322(0.67),
 

Physical Properties of Erionite-Na

Help on Cleavage: Cleavage: {010} Distinct
Help on Color: Color: White, Green, Gray, Orange.
Help on Density: Density: 2.09 - 2.13, Average = 2.11
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Splintery - Thin, elongated fractures produced by intersecting good cleavages or partings (e.g. hornblende).
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Hardness: Hardness: 3.5-4 - Copper Penny-Fluorite
Help on Luster: Luster: Vitreous - Silky
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white
 

Optical Properties of Erionite-Na

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.028 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2272,KPDmeas= 0.2207,KC= 0.2271
Ncalc = 1.47 - 1.48
Help on Optical Data: Optical Data: Uniaxial (+), w=1.4711, e=1.474, bire=0.0191.
 

Calculated Properties of Erionite-Na

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.07 gm/cc
note: Specific Gravity of Erionite-Na =2.05 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEErionite-Na = 1.71 barns/electron
U=PEErionite-Na x relectron= 3.55 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 40.59 (Gamma Ray American Petroleum Institute Units)
Concentration of Erionite-Na per GRapi unit = 2.46 (%)

Estimated Radioactivity from Erionite-Na - barely detectable

 

Erionite-Na Classification

Help on  Dana Class: Dana Class: 77.01.02.05 (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
Help on  Strunz Class: Strunz Class: 09.GD.20 09 - SILICATES (Germanates)
  09.G - Tektosilicates with Zeolitic H2O
  09.GD -Chains of 6-membered rings � tabular zeolites
 
09.GD.20 Bellbergite (K,Ba,Sr)2Sr2Ca2(Ca,Na)4Al18Si18O72•30(H2O) P 63/mmc, P 62c-, P 63mc Hex
 
09.GD.20 Erionite-Ca! (Ca,K2,Na2)2[Al4Si14O36]•15(H2O) P 63/mmc 6/m 2/m 2/m
 
09.GD.20 Erionite-K! (K2,Ca,Na2)2[Al4Si14O36]•15(H2O) P 63/mmc 6/m 2/m 2/m
 
09.GD.20 Erionite-Na (Na2,K2,Ca)2[Al4Si14O36]•15(H2O) P 63/mmc 6/m 2/m 2/m
 

Other Erionite-Na Information

Help on References: References: NAME( Ford32) PHYS. PROP.(CanMin, v 35, p 1581) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Erionite-Na :
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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Print or Cut-and-Paste your Erionite-Na Specimen Label here :

Erionite-Na

(Na2,K2,Ca)2[Al4Si14O36]•15(H2O)
Dana No: 77.01.02.05 Strunz No: 09.GD.20
Locality:

 

Notes:

 

 
   
 


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