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Erionite-K Mineral Data

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General Erionite-K Information

Help on Chemical  Formula: Chemical Formula: (K2,Ca,Na2)2[Al4Si14O36]•15(H2O)
Help on Composition: Composition: Molecular Weight = 2,958.94 gm
   Potassium   4.39 %  K     5.28 % K2O
   Barium      0.09 %  Ba    0.10 % BaO
   Sodium      1.79 %  Na    2.42 % Na2O
   Calcium     1.34 %  Ca    1.88 % CaO
   Magnesium   0.05 %  Mg    0.08 % MgO
   Aluminum    7.34 %  Al   13.87 % Al2O3
   Silicon    26.59 %  Si   56.88 % SiO2
   Hydrogen    2.18 %  H    19.48 % H2O
   Oxygen     56.23 %  O
             ______        ______ 
             100.00 %       99.99 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K3.32Na2.31Ca0.99Mg0.06Ba0.02Al8.05Si28.01O72�31.99(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: Approved IMA 1998 (Dana # Added)
Help on Locality: Locality: Rome, Oregon, U.S.A. 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. The K-dominant member of the erionite series.
Help on Name Pronunciation: Name Pronunciation: Erionite-K Say ERIONITE-K
 

Erionite-K Image

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  Erionite-K

Comments: Randomly oriented colorless prismatic erionite-K crystals in a vug.
Location: Chase Creek, Falkland, British Columbia, Canada. Scale: See Image.
© Rruff Database

Erionite-K Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.14204
Help on Cell Dimensions: Cell Dimensions: a = 13.2, c = 15.075, Z = 1; V = 2,274.76 Den(Calc)= 2.16
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-K

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-K

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.05 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.072 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2156,KPDmeas= 0.2207,KC= 0.2324
Ncalc = 1.49 - 1.5
Help on Optical Data: Optical Data: Uniaxial (+), w=1.4711, e=1.474, bire=0.0191.
 

Calculated Properties of Erionite-K

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.14 gm/cc
note: Specific Gravity of Erionite-K =2.11 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEErionite-K = 2.27 barns/electron
U=PEErionite-K x relectron= 4.86 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 64.28 (Gamma Ray American Petroleum Institute Units)
Concentration of Erionite-K per GRapi unit = 1.56 (%)

Estimated Radioactivity from Erionite-K - barely detectable

 

Erionite-K Classification

Help on  Dana Class: Dana Class: 77.01.02.05a (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-K Information

Help on References: References: NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Erionite-K :
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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Erionite-K

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

 

Notes:

 

 
   
 


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