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Erionite-Na

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Formula:
(Na2,K2,Ca)2[Al4Si14O36] · 15H2O
Colour:
White
Lustre:
Vitreous
Hardness:
3½ - 4
Crystal System:
Hexagonal
Name:
Named in 1898 by Arthur Starr Eakle from the Greek εριον meaning wool in allusion to the "wooly" appearance of the type material. Erionite was first found at the Durkee Fire Opal Mine, Swayze Creek, Durkee, Baker Co., Oregon (Tschernich, 1992). In modern nomenclature, the original erionite was erionite-Na, but potassium was nearly equal to sodium. Levinson Rule suffix added in allusion to Na dominant excangable cations.
Isostructural with:
A zeolite difficult to distinguish from offrétite.


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Classification of Erionite-NaHide

Approved, 'Grandfathered' (first described prior to 1959)
Approval Year:
1998
9.GD.20

9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
D : Chains of 6-membered rings – tabular zeolites

Physical Properties of Erionite-NaHide

Vitreous
Colour:
White
Streak:
White
Hardness:
3½ - 4 on Mohs scale

Optical Data of Erionite-NaHide

Type:
Uniaxial (+)
RI values:
nω = 1.471 nε = 1.474
Max Birefringence:
δ = 0.003
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of Erionite-NaHide

Formula:
(Na2,K2,Ca)2[Al4Si14O36] · 15H2O
IMA Formula:
Na10(Si26Al10O72) · 30H2O

Crystallography of Erionite-NaHide

Crystal System:
Hexagonal
Class (H-M):
6/mmm (6/m 2/m 2/m) - Dihexagonal Dipyramidal
Space Group:
P63/mmc
Cell Parameters:
a = 13.15 Å, c = 15.05 Å
Ratio:
a:c = 1 : 1.144
Unit Cell V:
2,253.82 ų (Calculated from Unit Cell)

Type Occurrence of Erionite-NaHide

Other Language Names for Erionite-NaHide

Relationship of Erionite-Na to other SpeciesHide

Other Members of this group:
Erionite-Ca(Ca,K2,Na2)2[Al4Si14O36] · 15H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
Erionite-K(K2,Ca,Na2)2[Al4Si14O36] · 15H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc

Common AssociatesHide

Associated Minerals Based on Photo Data:
Lévyne1 photo of Erionite-Na associated with Lévyne on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.GD.05Gmelinite-CaCa2(Si8Al4O24] · 11H2OHex.
9.GD.05Gmelinite-KK4(Si8Al4O24) · 11H2OHex.
9.GD.05Gmelinite-NaNa4(Si8Al4O24] · 11H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
9.GD.10WillhendersoniteKCa[Al3Si3O12] · 5H2OTric.
9.GD.10Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2OTric. 1 : P1
9.GD.10Chabazite-K(K2,Ca,Na2,Sr,Mg)2[Al2Si4O12]2 · 12H2O
9.GD.10Chabazite-Na(Na2,K2,Ca,Sr,Mg)2[Al2Si4O12]2 · 12H2O
9.GD.10Chabazite-SrSr2[Al2Si4O12]2 · 12H2O
9.GD.10Chabazite-Mg(Mg0.7K0.5Ca0.5Na0.1)[Al3Si9O24]·10H2O Trig. 3m (3 2/m) : R3m
9.GD.15Lévyne-Ca(Ca,Na2,K2)[Al2Si4O12] · 6H2OTrig. 3m (3 2/m) : R3m
9.GD.15Lévyne-Na(Na2,Ca,K2)[Al2Si4O12] · 6H2OTrig.
9.GD.20Bellbergite(K,Ba,Sr)2Sr2Ca2(Ca,Na)4[Al3Si3O12]6 · 30H2OHex.
9.GD.20Erionite-Ca(Ca,K2,Na2)2[Al4Si14O36] · 15H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
9.GD.20Erionite-K(K2,Ca,Na2)2[Al4Si14O36] · 15H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
9.GD.25OffretiteKCaMg(Si13Al5)O36 · 15H2OHex. 6 m2 : P6m2
9.GD.25Wenkite(Ba,K)4(Ca,Na)6[(SO4)3|(Si,Al)20O39(OH)2] · 0.5H2OHex.
9.GD.30Faujasite-Ca(Ca,Na2,Mg)3.5[Al7Si17O48] · 32H2OIso.
9.GD.30Faujasite-Mg(Mg,Na2,Ca)3.5[Al7Si17O48] · 32H2OIso.
9.GD.30Faujasite-Na(Na2,Ca,Mg)3.5[Al7Si17O48] · 32H2OIso.
9.GD.35MaricopaitePb7Ca2(Si,Al)48O100 · 32H2OOrth.
9.GD.35Mordenite(Na2,Ca,K2)Al2Si10O24 · 7H2OOrth.
9.GD.40Dachiardite-Ca(Ca,Na2,K2)5Al10Si38O96 · 25H2OMon.
9.GD.40Dachiardite-Na(Na2,Ca,K2)5Al10Si38O96 · 25H2OMon.
9.GD.45EpistilbiteCaAl2Si6O16 · 5H2OMon.
9.GD.50Ferrierite-K(K2,Na2,Mg,Ca)3-5Mg[Al5-7Si27.5-31O72] · 18H2OOrth.
9.GD.50Ferrierite-Mg(Mg,Na2,K2,Ca)3-5Mg[Al5-7Si27.5-31O72] · 18H2OOrth.
9.GD.50Ferrierite-Na(Na2,K2,Mg,Ca)3-5Mg[Al5-7Si27.5-31O72] · 18H2OMon. 2/m
9.GD.55BikitaiteLiAlSi2O6 · H2OTric. 1 : P1

Other InformationHide

Health Risks:
Carcinogenic upon inhalation of its dust, due to its fibrous structure (Ref.: IARC Monography 42:225-239, 1987)

References for Erionite-NaHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Sheppard, R.A. and Gude, A.J. (1969b) Chemical composition and physical properties of the related zeolites offretite and erionite. American Mineralogist: 54: 875-886.
Gualtieri, A., G. Artioli, E. Passaglia, S. Bigi, A. Viani, and J.C. Hanson (1998): Crystal structure-crystal chemistry relationships in the zeolites erionite and offretite American Mineralogist: 83, 590-606.
Passaglia, E., G. Artioli, and A. Gualtieri (1998): Crystal chemistry of the zeolites erionite and offretite American Mineralogis: 83, 577-589.
European Journal of Mineralogy: 10 (1998), 1037.

Internet Links for Erionite-NaHide

Localities for Erionite-NaHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Antarctica
 
  • Eastern Antarctica
    • Terra Nova Bay
Dogan,Umran and Dogan,Meral (2008) Re-evaluation and re-classification of erionite series minerals:Environ Geochem Health 30:355-366
    • Victoria Land
Dogan,Umran and Dogan,Meral (2008) Re-evaluation and re-classification of erionite series minerals:Environ Geochem Health 30:355-366
Australia
 
  • Victoria
    • Bass Coast Shire
Birch, W.D. (1989) Zeolites of Victoria. Mineralogical Society of Victoria - Special Publication No.2 (110 pages).
    • Flinders area
Dogan,Umran and Dogan,Meral (2008) Re-evaluation and re-classification of erionite series minerals,Environ Geochem Health 30:355-366
Italy
 
  • Veneto
    • Vicenza Province
      • Montecchio Maggiore
        • San Pietro
Passaglia E., Artioli G., Gualtieri A. - Crystal chemistry of zeolites erionite and offretite. Amer. Mineral. (1998), Vol. 83, pp. 577-589.
Japan
 
  • Kyushu Region
    • Nagasaki Prefecture
      • Iki Island
SHIMAZU, M., & MIZOTA, T. (1972). Levyne and erionite from Chojabaru, Iki Island, Nagasaki Prefecture, Japan. The Journal of the Japanese Association of Mineralogists, Petrologists and Economic Geologists, 67(12), 418-424.
Tanzania
 
  • Arusha Region
Dogan,Umran and Dogan,Meral(2008) Re-evaluation and re-classification of erionite series minerals,Environ Geochem Health 30:355-366
Turkey
 
  • Central Anatolia Region
    • Nevşehir Province
Dogan,Umran and Dogan,Meral (2008) Re-evaluation and re-classification of erionite series minerals,Environ Geochem Health 30:355-366
UK
 
  • Northern Ireland
    • Co. Antrim
      • Giant's Causeway
Embrey, P.G. (1978) Fourth supplementary list of British Minerals. Mineralogical Magazine, vol. 42, n° 322, 169-177. [as "erionite"]; Passaglia E., Artioli G. and Gualtieri A. (1998): Crystal chemistry of the zeolites erionite and offretite. American Mineralogist 83, 577-589; Jaroslaw Skupiewski; RRUFF database-specimen I.D R061126
USA (TL)
 
  • California
    • San Bernardino Co.
Am.Min. 83 (1998), 577
  • North Dakota
    • Dunn Co.
USGS Open File report 10-1286
  • Oregon
    • Baker Co.
      • Durkee
A. Eakle (1898)
    • Malheur Co.
Dogan,Umran and Dogan,Meral (2008) Re-evaluation and re-classification of erionite series minerals, Environ Geochem Health 30:355-366
Mineral and/or Locality  
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