Help|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on MindatThe Mindat Store
Minerals by PropertiesMinerals by ChemistryRandom MineralSearch by minIDLocalities Near MeSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportAdd Glossary Item
StatisticsMember ListBooks & MagazinesMineral Shows & EventsThe Mindat DirectoryHow to Link to MindatDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery


This page is currently not sponsored. Click here to sponsor this page.
(K,Na,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O
3½ - 4
Member of:
From the Greek klino - "oblique" ptylon - "feather" and lithos - "stone." Named as the monoclinic dimorph of "ptilolite" (mordenite).

Classification of Clinoptilolite-K


9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
E : Chains of T10O20 Tetrahedra URL:
Please feel free to link to this page.

Type Occurrence of Clinoptilolite-K

Physical Properties of Clinoptilolite-K

Hardness (Mohs):
3½ - 4

Crystallography of Clinoptilolite-K

Crystal System:
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 17.688Å, b = 17.902Å, c = 7.409Å
β = 116.5°
a:b:c = 0.988 : 1 : 0.414
Unit Cell Volume:
V 2,099.57 ų (Calculated from Unit Cell)

Optical Data of Clinoptilolite-K

Biaxial (+/-)
RI values:
nα = 1.476 - 1.491 nβ = 1.479 - 1.493 nγ = 1.479 - 1.497
Measured: 31° to 48°
Max Birefringence:
δ = 0.003 - 0.006
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
r > v to r < v strong

Chemical Properties of Clinoptilolite-K

(K,Na,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O
Essential elements:
All elements listed in formula:

Relationship of Clinoptilolite-K to other Species

Forms a series with Heulandite-K (see here)
Member of:
Other Members of Group:
AlflarseniteNaCa2Be3Si4O13(OH) · 2H2O
AmiciteK2Na2Al4Si4O16 · 5H2O
AnalcimeNa2(Al2Si4O12) · 2H2O
Barrerite(Na,K,Ca0.5)2[Al2Si7O18] · 7H2O
Beaumontite (of Lévy)
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-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Chabazite-K(K2,Ca,Na2,Sr,Mg)2[Al2Si4O12]2 · 12H2O
Chabazite-Levyne Subgroup
Chabazite-Na(Na2,K2,Ca,Sr,Mg)2[Al2Si4O12]2 · 12H2O
Chabazite-SrSr2[Al2Si4O12]2 · 12H2O
ChiavenniteCaMnBe2Si5O13(OH)2 · 2H2O
Clinoptilolite-Ca(Ca,Na,K)2-3Al3(Al,Si)2Si13O36 · 12H2O
Clinoptilolite-Na(Na,K,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O
CowlesiteCaAl2Si3O10 · 6H2O
Dachiardite-Ca(Ca,Na2,K2)5Al10Si38O96 · 25H2O
Dachiardite-Na(Na2,Ca,K2)5Al10Si38O96 · 25H2O
DirenzoiteNaK6MgCa2(Al13Si47O120) · 36H2O
EdingtoniteBa[Al2Si3O10] · 4H2O
EpistilbiteCaAl2Si6O16 · 5H2O
Erionite-Ca(Ca,K2,Na2)2[Al4Si14O36] · 15H2O
Erionite-K(K2,Ca,Na2)2[Al4Si14O36] · 15H2O
Erionite-Na(Na2,K2,Ca)2[Al4Si14O36] · 15H2O
Faujasite Subgroup
Faujasite-Ca(Ca,Na2,Mg)3.5[Al7Si17O48] · 32H2O
Faujasite-Mg(Mg,Na2,Ca)3.5[Al7Si17O48] · 32H2O
Faujasite-Na(Na2,Ca,Mg)3.5[Al7Si17O48] · 32H2O
Ferrierite-K(K2,Na2,Mg,Ca)3-5Mg[Al5-7Si27.5-31O72] · 18H2O
Ferrierite-Mg(Mg,Na2,K2,Ca)3-5Mg[Al5-7Si27.5-31O72] · 18H2O
Ferrierite-Na(Na2,K2,Mg,Ca)3-5Mg[Al5-7Si27.5-31O72] · 18H2O
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
Gmelinite-CaCa2(Si8Al4O24] · 11H2O
Gmelinite-KK4(Si8Al4O24) · 11H2O
Gmelinite-NaNa4(Si8Al4O24] · 11H2O
GobbinsiteNa5(Si11Al5)O32 · 11H2O
Gonnardite(Na,Ca)2(Si,Al)5O10 · 3H2O
GoosecreekiteCa[Al2Si6O16] · 5H2O
GottardiiteNa3Mg3Ca5Al19Si117O272 · 93H2O
Harmotome(Ba0.5,Ca0.5,K,Na)5[Al5Si11O32] · 12H2O
Heulandite-Ba(Ba,Ca,K,Na,Sr)5Al9Si27O72 · 22H2O
Heulandite-Ca(Ca,Na)2-3Al3(Al,Si)2Si13O36 · 12H2O
Heulandite-K(K,Na,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O
Heulandite-Na(Na,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O
Heulandite-Sr(Sr,Na,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O
LaumontiteCaAl2Si4O12 · 4H2O
Lévyne-Ca(Ca,Na2,K2)[Al2Si4O12] · 6H2O
Lévyne-Na(Na2,Ca,K2)[Al2Si4O12] · 6H2O
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
MesoliteNa2Ca2Si9Al6O30 · 8H2O
Montesommaite(K,Na)9Al9Si23O64 · 10H2O
Mordenite(Na2,Ca,K2)Al2Si10O24 · 7H2O
MutinaiteNa3Ca4Si85Al11O192 · 60H2O
NabesiteNa2BeSi4O10 · 4H2O
NatroliteNa2Al2Si3O10 · 2H2O
Natrolite Subgroup
OffretiteKCaMg(Si13Al5)O36 · 15H2O
PahasapaiteLi8(Ca,Li,K)10.5Be24(PO4)24 · 38H2O
ParanatroliteNa2Al2Si3O10 · 3H2O
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
Phillipsite-Ca(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32 . 12H2O
Phillipsite-K(K,Na,Ca0.5,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Phillipsite-Na(Na,K,Ca0.5,Ba0.5)4-7[Al4-7Si12-9O32] · 12H2O
Pollucite(Cs,Na)2(Al2Si4O12) · 2H2O
RoggianiteCa2Be(OH)2Al2Si4O13 · 2.5H2O
ScoleciteCaAl2Si3O10 · 3H2O
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
9.GE.05Clinoptilolite-Ca(Ca,Na,K)2-3Al3(Al,Si)2Si13O36 · 12H2O
9.GE.05Clinoptilolite-Na(Na,K,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O
9.GE.05Heulandite-Ca(Ca,Na)2-3Al3(Al,Si)2Si13O36 · 12H2O
9.GE.05Heulandite-K(K,Na,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O
9.GE.05Heulandite-Na(Na,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O
9.GE.05Heulandite-Sr(Sr,Na,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O
9.GE.05Heulandite-Ba(Ba,Ca,K,Na,Sr)5Al9Si27O72 · 22H2O
9.GE.10Stilbite-CaNaCa4[Al9Si27O72] · nH2O
9.GE.10Stilbite-Na(Na,Ca,K)6-7[Al8Si28O72] · nH2O
9.GE.15Barrerite(Na,K,Ca0.5)2[Al2Si7O18] · 7H2O
9.GE.15StelleriteCa4(Si28Al8)O72 · 28H2O
9.GE.20Brewsterite-Ba(Ba,Sr)[Al2Si6O16] · 5H2O
9.GE.20Brewsterite-Sr(Sr,Ba,Ca)[Al2Si6O16] · 5H2O

Other Names for Clinoptilolite-K

Name in Other Languages:

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Clinoptilolite-K

Reference List:
Koyama, K. & Y. Takeuchi (1977), Clinoptilolite: The distribution of potassium atoms and its role in thermal stability: Zeitschrift für Kristallographie: 145: 216-239.

Tschermaks Mineralogische und Petrographische Mitteilungen: 18: 129-146.

Armbruster, T. (1993), Dehydration mechanism of clinoptilolite and heulandite: Single-crystal X-ray study of Na-poor, Ca-, K-, Mg-rich clinoptilolite at 100K: American Mineralogist: 78: 260-264.

Fahri Esenli and Isik Kumbasar (1998) X-Ray Diffraction Intensity Ratios I(111)//(311) of Natural Heulandites and Clinoptilolites, Clays and Clay Minerals, Vol. 46, No. 6, 679-686, 1998.

Johnson, M., O'Connor, D., Barnes, P., Catlow, C. R. A., Owens, S. L., Sankar, G., Bell, R., Teat, S. J. and Stephenson, R. (2003): Cation exchange, dehydration, and calcination in clinoptilolite: in situ X-ray diffraction and computer modeling. J. Phys. Chem. B, 107, 942-951.

Snellings, R.A., Gualtieri, A.F., Elsen, J. (2009): The Rietveld structure refinement of an exceptionally pure sample of clinoptilolite from Ecuador and its Na-, K-, and Ca-exchanged forms. Zeitschrift für Kristallographie Supplements, 30, 395-40

Internet Links for Clinoptilolite-K

Localities for Clinoptilolite-K

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.
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
R.Tillet specimen (1999)
  • Heilongjiang Province (Manchuria; Dongbei Region)
    • Mudanjiang Prefecture
      • Muling Co.
Shouting Zhang, Pengda Zhao, Zhanzhang Xu, and Gengdong Yang (2004): Mineral Deposits 23(1), 31-38
Czech Republic
  • Moravia (Mähren; Maehren)
    • Moravia-Silesia Region
      • Příbor
Peter Fuchs
  • Honshu Island
    • Tohoku Region
      • Yamagata Prefecture
        • Yonezawa City
Minato & Takano (1964) Nendo Kagaku, 4, 12-22.
  • Far-Eastern Region
    • Kamchatka Oblast'
Pavel M. Kartashov analytical data (1984)
  • California
    • Los Angeles Co.
      • Santa Monica Mts
RRUFF database specimen no.R110201
  • Idaho
Altaner,Stephan P. and Grim,Ralph E.(1990) Mineralogy,Chemistry,And Diagenesis Of Tuffs In The Sucker Creek Formation (Miocene) Eastern Oregon; Clays and Clay Minerals,Vol.38,No.6,pp.561-572,pg 563, Section E.
  • Oregon
Altaner,Stephan P.and Grim,Ralph E.(1990) Mineralogy ,Chemistry,And Diagenesis Of Tuffs In The Sucker Creek Formation(Miocene),Eastern Oregon:Clays and Clay Minerals ,Vol.38,No.6,pp.561-572
  • Wyoming
    • Park Co.
Am Min (1938) 17:128-134; Am. J. Sci. (1890) 40:232; PIRSSON, L.V. (1890): On mordenite. Am. J. Sci. 140, 232-237.
Mineral and/or Locality is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © and the Hudson Institute of Mineralogy 1993-2015, except where stated. relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: October 9, 2015 06:12:01 Page generated: October 6, 2015 12:03:53