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Generally not pure but containing additional Na and/or K. Formula previously given as (Ca,Na,K)2-3Al3(Al,Si)2Si13O36.12H2O.
3½ - 4
Member of:
From the Greek klino - "oblique" ptylon - "feather" and lithos - "stone." The Ca-dominant member of the clinoptilolite series.

Classification of Clinoptilolite-Ca


9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
E : Chains of T10O20 Tetrahedra

Type Occurrence of Clinoptilolite-Ca

Physical Properties of Clinoptilolite-Ca

Hardness (Mohs):
3½ - 4

Crystallography of Clinoptilolite-Ca

Crystal System:
Cell Parameters:
a = 17.66Å, b = 17.963Å, c = 7.4Å
β = 116.47°
a:b:c = 0.983 : 1 : 0.412
Unit Cell Volume:
V 2,101.39 ų (Calculated from Unit Cell)

Optical Data of Clinoptilolite-Ca

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-Ca


Generally not pure but containing additional Na and/or K. Formula previously given as (Ca,Na,K)2-3Al3(Al,Si)2Si13O36.12H2O.
All elements listed in formula:

Relationship of Clinoptilolite-Ca to other Species

Forms a series with Heulandite-Ca (see here)
Member of:
Other Members of Group:
AlflarseniteNaCa2Be3Si4O13(OH) · 2H2O
AmiciteK2Na2Al4Si4O16 · 5H2O
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
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-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)5(Si27Al9)O72 · 22H2O
Heulandite-Ca(Ca,Na)5(Si27Al9)O72 · 26H2O
Heulandite-K(K,Ca,Na)5(Si27Al9)O72 · 26H2O
Heulandite-Na(Na,Ca,K)6(Si,Al)36O72 · 22H2O
Heulandite-Sr(Sr,Na,Ca)5(Si27Al9)O72 · 24H2O
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
MesoliteNa2Ca2Si9Al6O30 · 8H2O
Montesommaite(K,Na)9Al9Si23O64 · 10H2O
Mordenite(Na2,Ca,K2)Al2Si10O24 · 7H2O
MutinaiteNa3Ca4Si85Al11O192 · 60H2O
NabesiteNa2BeSi4O10 · 4H2O
NatroliteNa2Al2Si3O10 · 2H2O
Natrolite SubgroupA subgroup of the Zeolite Group.
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.05Heulandite-Ca(Ca,Na)5(Si27Al9)O72 · 26H2O
9.GE.05Heulandite-K(K,Ca,Na)5(Si27Al9)O72 · 26H2O
9.GE.05Heulandite-Na(Na,Ca,K)6(Si,Al)36O72 · 22H2O
9.GE.05Heulandite-Sr(Sr,Na,Ca)5(Si27Al9)O72 · 24H2O
9.GE.05Heulandite-Ba(Ba,Ca,K)5(Si27Al9)O72 · 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-Ca

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-Ca

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

Zeitschrift für Kristallographie: 145: 216-239.

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.

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-Ca URL:
Please feel free to link to this page.

Localities for Clinoptilolite-Ca

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.
  • Neuquén
    • Lácar department
      • Caleufú
Pablo Rodrigo Leal, María Elena Vattuone, and Carlos Oscar Latorre (2011) Zeolite assemblages from Northern Patagonian Andes, Argentina: A review. Revista Mexicana de Ciencias Geológicas, v.28, núm. 2, 2011, p. 212-225
  • Tavuš Province (Tavush)
    • Idzhevan
Pavel M. Kartashov data
  • Lower Austria
    • Waldviertel
      • Maria Laach am Jauerling
        • Zintring
Kolitsch, U. & Löffler, E. (2012): 1759) Apatit, Klinoptilolith-Ca, Meionit, Prehnit, Titanit, Zirkon und weitere Mineralien aus einem Steinbruch bei Zintring, Maria Laach am Jauerling, Waldviertel, Niederösterreich. Pp. 161-162 in Niedermayr, G. et al. (2012): Neue Mineralfunde aus Österreich LXI. Carinthia II, 202./122., 123-180.
      • Raabs an der Thaya
        • Eibenstein an der Thaya
Kolitsch, U., Schillhammer, H. & Lamatsch, P. (2015): 1936) Analcim, Axinit-(Fe), Chamosit, Datolith, Gips, Heulandit-Ca, Hyalit, Jarosit, Klinochlor, Klinoptilolith-Ca, Laumontit, Malachit, Molybdänit, Siderit, Sphalerit und Uraninit vom Steinbruch Hengl bei Eibenstein an der Thaya, Waldviertel, Niederösterreich. Pp. 243-245 in Niedermayr, G. et al. (2015): Neue Mineralfunde aus Österreich LXIV. Carinthia II, 205./125., 207-280.
  • Kardzhali Oblast (Kurdzhali; Kărdžali; Kurdjali)
    • Momchilgrad Obshtina
Encheva, S., Petrov, P., Chukanov, N., Pekov, I., Енчева, С., Петко, П., ... & Пеков, И. Dachiardite-K from the area of Austa village, Momchilgrad municipality, Eastern Rhodopes–a new mineral species of zeolite group Дакиардит-K от района на с. Ауста, община Момчилград, Източни Родопи–нов минерален вид от групата на зеолитите.
  • Nova Scotia
    • Cumberland Co.
      • Parrsboro
PE-PIPER, G. and MILLER, L. (2002) Zeolite minerals from the North Shore of the Minas Basin, Nova Scotia, Atlantic Geology, 38, 1, 11-28. (Sample W180)
    • Kings Co.
PE-PIPER, G. and MILLER, L. (2002) Zeolite minerals from the North Shore of the Minas Basin, Nova Scotia, Atlantic Geology, 38, 1, 11-28.
      • Bay of Fundy
Canadian Mineralogist 38, 1215.
Canadian Mineralogist Vol 38 pp. 1215-1232 (2000)
  • Québec
    • Laurentides
      • Argenteuil RCM
        • Wentworth
          • Laurel
Van Velthuizen et al. (2006) Mineral. Record 37, 283 [locality 48]
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
Horváth collection XRD & EMPA EDS
  • Larnaca District (Larnaka District; İskele District)
Prüfer, P. (2010): Mineralien der Insel Zypern. Der Aufschluss 61, 97-106. (in German)
Czech Republic
  • Bohemia (Böhmen; Boehmen)
    • Ústí Region
      • Děčín (Tetschen)
        • Krásná Lípa
P.Pauliš,L.Hrůzek,O.Janeček,J.Sejkora,R.Malíková,F.Fedyuk(2014)Dachiardite Ca and associated mineralization from Doubice-Vápenka near Krásná Lípa(Czech Rep.),Bull.Miner.-Petrolog.od.Národní Muzeum Praha,22,1,2014.
  • Bavaria
    • Lower Bavaria
      • Röhrnbach
Habel, M. (2009): Der Granodioritbruch der Fa. Josef Uhrmann OHG, Steinerleinbach bei Röhrnbach. Mineralien-Welt 20 (2), 66-86.
  • Borsod-Abaúj-Zemplén Co.
    • Zemplén Mts (Tokaj Mts)
      • Rátka
WDS - Norbert Zajzon
  • Heves Co.
    • Mátra Mts
      • Kisnána
GEODA, 2000
  • Veszprém Co.
    • Bakony Mts
Szakáll-Gatter-Szendrei: Mineral Species of Hungary, 2005
Indian Ocean
  • Ninety East Ridge (90° E Ridge; Indian Ridge)
    • D.S.D.P.
      • Leg 26
D. Besse et al. , Bell. Minéral. , 1981, 104, pp. 56-63.
Japan (TL)
  • Honshu Island
    • Tohoku Region
      • Fukushima Prefecture
Z. Kristallogr. 145, 216; Can. Mineral. (1997) 35, 1571
  • Kyushu Region
    • Fukuoka prefecture
Nendo Kagaku v.30, no.1 (1990)
New Zealand
  • North Island
    • Waikato
      • Thames-Coromandel
        • Whitianga
S. J. Mills, Museum Victoria
  • South Island
    • Canterbury
S. J. Mills, Museum Victoria
  • Canary Islands
    • Las Palmas Province
various added photos
        • La Aldea de San Nicolás
various added photos
  • England
    • Cornwall
      • St Just District
        • St Just
          • Botallack
            • Botallack Mine sett
J.Russell Socierty 2006, 68-71
  • Oregon
    • Clackamas Co.
RRUFF database specimen no. RO61098
    • Malheur Co.
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 562. RRUFF database specimen No.RO60662
    • Tillamook Co.
Wise, W.S. and Tschernich, R.W. (1976): Dachiardite-bearing zeolite assemblages in the Pacific Northwest, in: Sand, L.B. and Mumpton, F. (eds.): Natural Zeolites Occurrence, Properties, Use. Pergamon Press (Oxford, New York), pp. 105-111.
  • Washington
    • Douglas Co.
Tschernich (1991): Zeolites of Washington State. Rock & Minerals, 66(4); American Mineralogist, Volume 67, pages 799-803, 1982
    • Wahkiakum Co.
      • Altoona
Cannon, B. (1975): Minerals of Washington, p.75; Micro Probe Volume IX Number 3 Spring 2001
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