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Erionite-Ca

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Formula:
Ca5(Si26Al10O72) · 30H2O
System:
Hexagonal
Colour:
White
Lustre:
Vitreous
Hardness:
3½ - 4
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.


Classification of Erionite-Ca

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-Ca

Vitreous
Colour:
White
Streak:
White
Hardness (Mohs):
3½ - 4

Optical Data of Erionite-Ca

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-Ca

IMA Formula:
Ca5(Si26Al10O72) · 30H2O
Elements listed in formula:

Crystallography of Erionite-Ca

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 Volume:
V 2,253.82 ų (Calculated from Unit Cell)

Type Occurrence of Erionite-Ca

Relationship of Erionite-Ca to other Species

Other Members of Group:
Erionite-K(K2,Ca,Na2)2[Al4Si14O36] · 15H2O
Erionite-Na(Na2,K2,Ca)2[Al4Si14O36] · 15H2O
9.GD.05Gmelinite-CaCa2(Si8Al4)O24 · 11H2O
9.GD.05Gmelinite-KK4(Si8Al4)O24 · 11H2O
9.GD.05Gmelinite-NaNa4(Si8Al4)O24 · 11H2O
9.GD.10WillhendersoniteKCa(Si3Al3)O12 · 5H2O
9.GD.10Chabazite-CaCa2Al4Si8O24 · 13H2O
9.GD.10Chabazite-K(K2NaCa0.5)Al4Si8O24 · 11H2O
9.GD.10Chabazite-Na(Na3K)Al4Si8O24 · 11H2O
9.GD.10Chabazite-Sr(Sr,Ca)2Al4Si8O24 · 11H2O
9.GD.10Chabazite-Mg(Mg0.7K0.5Ca0.5Na0.1)Al3Si9O24 · 10H2O
9.GD.15Lévyne-CaCa3(Si12Al6)O36 · 18H2O
9.GD.15Lévyne-NaNa6(Si12Al6)O36 · 18H2O
9.GD.20Bellbergite(K,Ba,Sr)2Sr2Ca2(Ca,Na)4(Si,Al)36O72 · 30H2O
9.GD.20Erionite-KK10(Si26Al10O72) · 30H2O
9.GD.20Erionite-NaNa10(Si26Al10O72) · 30H2O
9.GD.25OffretiteKCaMg(Si13Al5)O36 · 15H2O
9.GD.25WenkiteBa4Ca6(Si,Al)20O41(OH)2(SO4)3 · H2O
9.GD.30Faujasite-Ca(Ca,Na,Mg)2(Si,Al)12O24 · 15H2O
9.GD.30Faujasite-Mg(Mg,Na,K,Ca)2(Si,Al)12O24 · 15H2O
9.GD.30Faujasite-Na(Na,Ca,Mg)2(Si,Al)12O24 · 15H2O
9.GD.35MaricopaiteCa2Pb7(Si36Al12)O99 · n(H2O,OH)
9.GD.35Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
9.GD.40Dachiardite-CaCa2(Si20Al4)O48 · 13H2O
9.GD.40Dachiardite-NaNa4(Si20Al4)O48 · 13H2O
9.GD.45EpistilbiteCa3(Si18Al6)O48 · 16H2O
9.GD.50Ferrierite-K(K,Na)5(Si31Al5)O72 · 18H2O
9.GD.50Ferrierite-Mg[Mg2(K,Na)2Ca0.5](Si29Al7)O72 · 18H2O
9.GD.50Ferrierite-Na(Na,K)5(Si31Al5)O72 · 18H2O
9.GD.55BikitaiteLiAlSi2O6 · H2O

Other Names for Erionite-Ca

Name in Other Languages:

Other Information

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

References for Erionite-Ca

Reference List:
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-Ca

mindat.org URL:
https://www.mindat.org/min-6915.html
Please feel free to link to this page.

Localities for Erionite-Ca

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
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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