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Erionite

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Lustre:
Silky
Member of:
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.
This name now refers to a group of related minerals. Erionite minerals have the average chemical formula Ca3K2Na2[Al10Si26O72].30H2O (Z = 1), whereas the closely related offrétite has the average chemical formula CaKMg[Al5Si13O36].16H2O (Z = 1).

NOTE: The zeolite mineral species epitaxially overgrown on lévyne in all cases is identified as erionite (Passaglia et al., 1998).


Classification of Erionite

16.10.25

16 : Silicates Containing Aluminum and other Metals
10 : Aluminosilicates of Ca and alkalis

Physical Properties of Erionite

Silky
Diaphaneity (Transparency):
Transparent, Translucent

Relationship of Erionite to other Species

Member of:
Other Members of Group:
AlflarseniteNaCa2Be3Si4O13(OH) · 2H2O
AmiciteK2Na2Al4Si4O16 · 5H2O
Ammonioleucite(NH4,K)(AlSi2O6)
AnalcimeNa(AlSi2O6) · H2O
Barrerite(Na,K,Ca0.5)2[Al2Si7O18] · 7H2O
Bellbergite(K,Ba,Sr)2Sr2Ca2(Ca,Na)4[Al3Si3O12]6 · 30H2O
BikitaiteLiAlSi2O6 · H2O
BoggsiteCa8Na3(Si,Al)96O192 · 70H2O
Brewsterite-Ba(Ba,Sr)[Al2Si6O16] · 5H2O
Brewsterite-Sr(Sr,Ba,Ca)[Al2Si6O16] · 5H2O
Chabazite-Levyne SubgroupA subgroup of the Zeolite Group.
ChiavenniteCaMnBe2Si5O13(OH)2 · 2H2O
ClinoptiloliteNote on the distinguishing differences between clinoptilolite and heulandite (hhttp://rruff.
CowlesiteCaAl2Si3O10 · 6H2O
Dachiardite-Ca(Ca,Na2,K2)5Al10Si38O96 · 25H2O
Dachiardite-KK4(Si20Al4O48)·13H2O
Dachiardite-Na(Na2,Ca,K2)5Al10Si38O96 · 25H2O
DirenzoiteNaK6MgCa2(Al13Si47O120) · 36H2O
EdingtoniteBa[Al2Si3O10] · 4H2O
EpistilbiteCaAl2Si6O16 · 5H2O
Faujasite SubgroupA subgroup of the Zeolite Group.
FerrieriteZeolite Group.
FerrochiavenniteCa1-2Fe[(Si,Al,Be)5Be2O13(OH)2] · 2H2O
Flörkeite(K3Ca2Na)[Al8Si8O32] · 12H2O
Garronite-CaNa2Ca5Al12Si20O64 · 27H2O
GaultiteNa4Zn2Si7O18 · 5H2O
Gismondine-BaBa2Al4Si4O16 · 4-6H2O
Gismondine-CaCaAl2Si2O8 · 4H2O
GmeliniteIn 1997, gmelinite was split into Gmelinite-Ca, Gmelinite-Na and Gmelinite-K.
GobbinsiteNa5(Si11Al5)O32 · 11H2O
GoosecreekiteCa[Al2Si6O16] · 5H2O
GottardiiteNa3Mg3Ca5Al19Si117O272 · 93H2O
Harmotome(Ba0.5,Ca0.5,K,Na)5[Al5Si11O32] · 12H2O
HeulanditeNote on the distinguishing differences between heulandite and clinoptilolite (http://rruff.
HsianghualiteCa3Li2(Be3Si3O12)F2
KirchhoffiteCs(BSi2O6)
LaumontiteCaAl2Si4O12 · 4H2O
LovdariteK2Na6Be4Si14O36 · 9H2O
MaricopaitePb7Ca2(Si,Al)48O100 · 32H2O
Mazzite-Mg(Mg,K,Ca)5(Si26Al10)O72 · 28H2O
Mazzite-NaNa8[Al4Si14O36]2 · 30H2O
Merlinoite(K,Na)5(Ca,Ba)2Al9Si23O64 · 23H2O
Montesommaite(K,Na)9Al9Si23O64 · 10H2O
Mordenite(Na2,Ca,K2)Al2Si10O24 · 7H2O
MutinaiteNa3Ca4Si85Al11O192 · 60H2O
NabesiteNa2BeSi4O10 · 4H2O
Natrolite SubgroupA subgroup of the Zeolite Group.
OffretiteKCaMg(Si13Al5)O36 · 15H2O
PahasapaiteLi8(Ca,Li,K)10.5Be24(PO4)24 · 38H2O
ParthéiteCa2(Si4Al4) O15 (OH)2•4H2O
Paulingite-Ca(Ca,K,Na,Ba,◻)10 (Si, Al)42O84•34H2O
Paulingite-K(K2,Ca,Na2,Ba)5[Al10Si35O90] · 45H2O
Paulingite-Na(Na2,K2,Ca,Ba)5[Al10Si35O90] · 45H2O
PerlialiteK9Na(Ca,Sr)[Al2Si4O12]6 · 15H2O
PhillipsiteZeolite Group.
Pollucite(Cs,Na)2(Al2Si4O12) · 2H2O
RoggianiteCa2Be(OH)2Al2Si4O13 · 2.5H2O
StelleriteCa4(Si28Al8)O72 · 28H2O
Stilbite-CaNaCa4[Al9Si27O72] · nH2O
Stilbite-Na(Na,Ca,K)6-7[Al8Si28O72] · nH2O
Terranovaite(Na,Ca)8(Si68Al12)O160 · 29H2O
Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Thomsonite-SrNa(Sr,Ca)2[Al5Si5O20] · 7H2O
Tschernichite(Ca,Na2)[Al2Si4O12] · 4-8H2O
TschörtneriteCa4(Ca,Sr,K,Ba)3Cu3[(OH)2|Al3Si3O12]4 · nH2O
WairakiteCa(Al2Si4O12) · 2H2O
WeinebeneiteCaBe3(PO4)2(OH)2 · 4H2O
Wenkite(Ba,K)4(Ca,Na)6[(SO4)3|(Si,Al)20O39(OH)2] · 0.5H2O
WillhendersoniteKCa[Al3Si3O12] · 5H2O
YugawaraliteCaAl2Si6O16 · 4H2O
Group Members:
Erionite-Ca (Ca,K2,Na2)2[Al4Si14O36] · 15H2O
Erionite-K (K2,Ca,Na2)2[Al4Si14O36] · 15H2O
Erionite-Na (Na2,K2,Ca)2[Al4Si14O36] · 15H2O
16.10.1Bytownite(Ca,Na)[Al(Al,Si)Si2O8]
16.10.2LisetiteNa2CaAl4(SiO4)4
16.10.4Thomsonite-CaNaCa2(Al5Si5)O20 · 6H2O
16.10.5Gonnardite(Na,Ca)2(Si,Al)5O10 · 3H2O
16.10.6MesoliteNa2Ca2(Si9Al6)O30 · 8H2O
16.10.7Faujasite
16.10.8Garronite-CaNaCa2.5(Si10Al6)O32 · 14H2O
16.10.9BoggsiteNa3Ca8(Si77Al19)O192 · 70H2O
16.10.10Herschelite(Na2,K2,Ca,Sr,Mg)2[Al2Si4O12]2 · 12H2O
16.10.11Phillipsite
16.10.12Fedorite(K,Na)2.5(Ca,Na)7Si16O38(OH,F)2 · 3.5H2O
16.10.13WillhendersoniteKCa(Si3Al3)O12 · 5H2O
16.10.14BarreriteNa2(Al2Si7)O18 · 6H2O
16.10.15Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
16.10.16ReyeriteNa2Ca14Al2Si22O58(OH)8 · 6H2O
16.10.17Lévyne
16.10.18Clinoptilolite
16.10.19Heulandite
16.10.20GobbinsiteNa5(Si11Al5)O32 · 11H2O
16.10.21Stilbite
16.10.22Dachiardite
16.10.23OffretiteKCaMg(Si13Al5)O36 · 15H2O
16.10.24PerlialiteK9NaCa(Si24Al12)O72 · 15H2O
16.10.26Paulingite
16.10.27Sodium Dachiardite(Na2,Ca,K2)4-5Al8Si40O96 · 26H2O
16.10.28Mazzite-MgMg5(Si26Al10)O72 · 30H2O
16.10.29RoggianiteCa2BeAl2Si4O13(OH)2 · nH2O (n < 2.5)

Other Names for Erionite

Name in Other Languages:
German:Erionit
Simplified Chinese:毛沸石
Spanish:Erionita
Traditional Chinese:毛沸石

Other Information

Health Risks:
Carcinogenic upon inhalation of its dust, due to its fibrous structure (IARC Monography 42: 225-239, 1987). The population of Cappadocia, Turkey, who live in houses built from erionite-bearing tuff, is reported to suffer from mesothelioma

See also:
http://blogs.cdc.gov/niosh-science-blog/2011/11/22/erionite/
http://www.earthmagazine.org/article/dangerous-dust-erionite-asbestos-mineral-causing-cancer-epidemic-turkey-found-least-13

References for Erionite

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.

A. Gualtieri, G. Artioli, E. Passaglia, S. Bigi, A. Viani, and J.C. Hanson (1998): Crystal structure-crystal chemistry relationships in the zeolites erionite and offretite. Am. Mineral. 83, 590-606.

E. Passaglia, G. Artioli, and A. Gualtieri (1998): Crystal chemistry of the zeolites erionite and offretite. Am. Mineral. 83, 577-589.

Internet Links for Erionite

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http://www.mindat.org/min-1399.html
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Localities for Erionite

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.
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