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Erionite-Ca

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Formula:
(Ca,K2,Na2)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 Ca dominant excangable cations.
Isostructural with:
A zeolite difficult to distinguish from offrétite.


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Classification of Erionite-CaHide

Approved
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-CaHide

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

Optical Data of Erionite-CaHide

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-CaHide

Formula:
(Ca,K2,Na2)2[Al4Si14O36] · 15H2O
IMA Formula:
Ca5(Si26Al10O72) · 30H2O

Crystallography of Erionite-CaHide

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-CaHide

Other Language Names for Erionite-CaHide

Relationship of Erionite-Ca to other SpeciesHide

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

Common AssociatesHide

Associated Minerals Based on Photo Data:
Lévyne-Ca9 photos of Erionite-Ca associated with Lévyne-Ca on mindat.org.
Lévyne2 photos of Erionite-Ca associated with Lévyne on mindat.org.
Hydroxylapatite1 photo of Erionite-Ca associated with Hydroxylapatite on mindat.org.
Analcime1 photo of Erionite-Ca associated with Analcime 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-K(K2,Ca,Na2)2[Al4Si14O36] · 15H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
9.GD.20Erionite-Na(Na2,K2,Ca)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-CaHide

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 Mineralogist: 83, 577-589.

Internet Links for Erionite-CaHide

Localities for Erionite-CaHide

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.
Australia
 
  • New South Wales
    • Brisbane Co.
Dogan,Umran and Dogan,Meral (2008) Re-evaluation and re-classification of erionite series minerals,Environ Geochem Health 30:355-366
  • Victoria
    • Bass Coast Shire
Birch, W.D. (1989) Zeolites of Victoria. Mineralogical Society of Victoria - Special Publication No.2 (110 pages).
    • Baw Baw Shire
Dogan,Umran and Dogan,Meral (2008) Re-evaluation and re-classification of erionite series minerals,Environ Geochem Health 30:355-366
Canada
 
Dogan,Umran and Dogan,Meral (2008) Re-evaluation and re-classification of erionite series minerals,Environ Geochem Health 30:355-366
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • Liberec Region
      • Česká Lípa (Böhmisch Leipa)
Erionite-Ca from the Michlův hill near Provodín - Bulletine mineral.petrolog.Nacional museum Prag 20.2.2012/ P.Pauliš, M.Radoň
    • Ústí Region
      • Děčín (Tetschen)
        • Česká Kamenice
-P.Pauliš,L.Hrůzek,O.Janeček,J.Sejkora,R.Malíková(2014):Cowlesit a doprovodná mineralizace z vrchu Hackenberg u České Kamenice.Bulletin mineralogicko-petrologického oddělení Národní muzeum Praha-2/2014
      • Ústí nad Labem (Aussig)
Rychlý, R., Langrová, A., Had, J.: Chemicstry of cowlesite from Zezice, Bohemia. Scripta Fac. Sci. Nat. Univ. Masaryk. Brun, Geol., 1996, vol. 26, p. 43 - 44.
France
 
  • Auvergne-Rhône-Alpes
    • Haute-Loire
      • Yssingeaux
        • Araules
Gualtieri A, et al. (1998) Crystal structure-crystal chemistry relationships in the zeolites erionite and offretite. American Mineralogist 83: 509-606
Germany
 
  • Rhineland-Palatinate
    • Eifel
      • Mayen
        • Ettringen
          • Bellerberg volcano
Blass, G., Graf, H.W., Neue Mineralienfunde aus der Vulkaneifel, Mineralien-Welt 12/1, 17-25, 2001
Italy
 
  • Sardinia
    • Oristano Province
Passaglia E., Artioli G. and Gualtieri A. (1998) : Crystal chemistry of the zeolites erionite and offretite. Amer. Mineral. 83, pagg. 577-589.
  • Veneto
    • Padova Province
      • Euganei Hills
        • Faedo
Passaglia E. and Taglavini A. (1995): Erionite from Faedo, Colli Euganei, Italy. N.Jb.Miner.Mh.,4, pagg.185-191.
    • 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 (TL)
 
  • Honshu Island
    • Chubu Region
      • Niigata Prefecture
        • Niigata City
Am. Mineral. 52, 1785; Can. Mineral. 35, 1571. RRUFF database- specimen I.D R061110
  • Tokyo Metropolis
    • Ogasawara Islands
      • Chichijima Group
Ryoji Tanaka specimens
New Zealand
 
  • South Island
    • Otago
RRUFF database- Specimen I.D R060836
Russia
 
  • Eastern-Siberian Region
    • Krasnoyarsk Territory (Krasnoyarsk Kray; Krasnoyarskii Krai)
      • Evenkia (Evenkiyskiy Autonomous okrug)
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
USGS Open File report 10-1286
UK
 
  • Northern Ireland
    • Co. Antrim
      • Antrim
Dogan,Umran and Dogan,Meral (2008) Re-evaluation and re- classification of erionite series minerals, Environ Geochem Health 30:355-366
Dogan,Umran and Dogan, Meral(2008) Re-evaluation and re-classification of erionite series minerals,Environ Geochem Health 30:355-366
Paolo Grosso
J. Skupiewski
Maggie Wilson
  • Scotland
    • North West Highlands
Dogan,Umran and Dogan,Meral (2008) Re-evaluation and re-classification of erionite series minerals : Environ Geochem Health 30:355-366
USA
 
  • Arizona
    • Pima Co.
O. Dzillas
  • New Mexico
    • Rio Arriba Co.
Patrick haynes
  • North Dakota
    • Dunn Co.
USGS Open File report 10-1286
JAMES MacPHERSON (Associated Press Writer) "North Dakota Gravel Sparks Fears." 5 April 2008
JAMES MacPHERSON (Associated Press Writer) "North Dakota Gravel Sparks Fears." 5 April 2008
  • Oregon
    • Clackamas Co.
      • Milwaukie
Wise, W.S. and Tschernich, R.W (1976) The chemical compositions and origin of the zeolites offretite, erionite, and levyne. American Mineralogist, V 61, pp. 853-863.
    • Grant Co.
      • Mount Vernon
Dogan,Umran and Dogan,Meral(2008) Re-evauation and re-classification of erionite series minerals,Envirion Geochem Health 30:355-366
    • Tillamook Co.
Micro Probe Volume IX Number 3
Mineral and/or Locality  
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