Clinoptilolite-K
A valid IMA mineral species - grandfathered
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About Clinoptilolite-K
Formula:
K6(Si30Al6)O72 · 20H2O
Generally not pure but containing additional Na and/or Ca. Formula previously given as (K,Na,Ca)2-3Al3(Al,Si)2Si13O36.12H2O.
Lustre:
Vitreous
Hardness:
3½ - 4
Crystal System:
Monoclinic
Member of:
Name:
From the Greek klino - "oblique" ptylon - "feather" and lithos - "stone." Named as the monoclinic dimorph of "ptilolite" (mordenite).
Type Locality:
The potassium analogue of Clinoptilolite-Ca and Clinoptilolite-Na. Clinoptilolite-K-Heulandite-K Series.
Unique Identifiers
Mindat ID:
6883
Long-form identifier:
mindat:1:1:6883:9
GUID
(UUID V4):
(UUID V4):
35a7dabb-e823-4503-ab7b-e189ea228e8c
IMA Classification of Clinoptilolite-K
Approved, 'Grandfathered' (first described prior to 1959)
First published:
1990
Classification of Clinoptilolite-K
9.GE.05
9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
E : Chains of T10O20 Tetrahedra
9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
E : Chains of T10O20 Tetrahedra
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference |
|---|---|---|
| Cpt-K | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Cpt | Whitney & Evans (2010) | Whitney, D.L. and Evans, B.W. (2010) Abbreviations for names of rock-forming minerals. American Mineralogist, 95, 185–187 doi:10.2138/am.2010.3371 |
| Cpt | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
| Cpt | Warr (2020) | Warr, L.N. (2020) Recommended abbreviations for the names of clay minerals and associated phases. Clay Minerals, 55, 261–264 doi:10.1180/clm.2020.30 |
Physical Properties of Clinoptilolite-K
Vitreous
Hardness:
3½ - 4 on Mohs scale
Optical Data of Clinoptilolite-K
Type:
Biaxial (+/-)
RI values:
nα = 1.476 - 1.491 nβ = 1.479 - 1.493 nγ = 1.479 - 1.497
2V:
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.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v to r < v strong
Chemistry of Clinoptilolite-K
Mindat Formula:
K6(Si30Al6)O72 · 20H2O
Generally not pure but containing additional Na and/or Ca. Formula previously given as (K,Na,Ca)2-3Al3(Al,Si)2Si13O36.12H2O.
Generally not pure but containing additional Na and/or Ca. Formula previously given as (K,Na,Ca)2-3Al3(Al,Si)2Si13O36.12H2O.
Crystallography of Clinoptilolite-K
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 17.688 Å, b = 17.902 Å, c = 7.409 Å
β = 116.5°
β = 116.5°
Ratio:
a:b:c = 0.988 : 1 : 0.414
Unit Cell V:
2,099.57 ų (Calculated from Unit Cell)
Z:
2
Comment:
Space Group: C2/m C2, or Cm
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0001549 | Clinoptilolite-K | Armbruster T (1993) Dehydration mechanism of clinoptilolite and heulandite: Single-crystal X-ray study of Na-poor, Ca-, K-, Mg-rich clinoptilolite at 100 K Sample Dehyd 2 Data obtained from the ICSD American Mineralogist 78 260-264 |  | 1993 | 0 | 293 | |
| 0001550 | Clinoptilolite-K | Armbruster T (1993) Dehydration mechanism of clinoptilolite and heulandite: Single-crystal X-ray study of Na-poor, Ca-, K-, Mg-rich clinoptilolite at 100 K Sample Dehyd 3 Data obtained from the ICSD American Mineralogist 78 260-264 | | 1993 | 0 | 293 |
CIF Raw Data - click here to close
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 3a: Earth’s earliest Hadean crust | >4.50 |
| 10 : Basalt-hosted zeolite minerals | |
| Stage 3b: Earth’s earliest hydrosphere | >4.45 |
| 16 : Low-𝑇 aqueous alteration of Hadean subaerial lithologies (see also #23) | |
| Near-surface Processes | |
| 23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47) | |
| 24 : Authigenic minerals in terrestrial sediments (see also #17) | |
| Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere | <0.6 |
| 48 : Soil leaching zone minerals | <0.6 |
Type Occurrence of Clinoptilolite-K
Reference:
Ogihara, S. and Iijima, A. (1990) Exceptionally K-rich clinoptilolite – heulandite group zeolites from three offshore boreholes off northern Japan. European Journal of Mineralogy: 2: 819-826.
Other Language Names for Clinoptilolite-K
Relationship of Clinoptilolite-K to other Species
Member of:
Other Members of this group:
| Clinoptilolite-Ca | Ca3(Si30Al6)O72 · 20H2O | Mon. 2/m |
| Clinoptilolite-Na | Na6(Si30Al6)O72 · 20H2O | Mon. 2/m : B2/m |
Forms a series with:
Common Associates
Associated Minerals Based on Photo Data:
| 4 photos of Clinoptilolite-K associated with Ferrierite-Mg | [Mg2(K,Na)2Ca0.5](Si29Al7)O72 · 18H2O |
| 2 photos of Clinoptilolite-K associated with Celadonite | K(MgFe3+◻)(Si4O10)(OH)2 |
| 1 photo of Clinoptilolite-K associated with Aegirine | NaFe3+Si2O6 |
Related Minerals - Strunz-mindat Grouping
| 9.GE.05 | Clinoptilolite-Ca | Ca3(Si30Al6)O72 · 20H2O |
| 9.GE.05 | Clinoptilolite-Na | Na6(Si30Al6)O72 · 20H2O |
| 9.GE.05 | Heulandite-Ca | (Ca,Na)5(Si27Al9)O72 · 26H2O |
| 9.GE.05 | Heulandite-K | (K,Ca,Na)5(Si27Al9)O72 · 26H2O |
| 9.GE.05 | Heulandite-Na | (Na,Ca,K)6(Si,Al)36O72 · 22H2O |
| 9.GE.05 | Heulandite-Sr | (Sr,Na,Ca)5(Si27Al9)O72 · 24H2O |
| 9.GE.05 | Heulandite-Ba | (Ba,Ca,K)5(Si27Al9)O72 · 22H2O |
| 9.GE.10 | Stilbite-Ca | NaCa4(Si27Al9)O72 · 28H2O |
| 9.GE.10 | Stilbite-Na | Na9(Si27Al9)O72 · 28H2O |
| 9.GE.15 | Barrerite | Na2(Si7Al2)O18 · 6H2O |
| 9.GE.15 | Stellerite | Ca4(Si28Al8)O72 · 28H2O |
| 9.GE.20 | Brewsterite-Ba | (Ba,Sr)[Al2Si6O16] · 5H2O |
| 9.GE.20 | Brewsterite-Sr | (Sr,Ba,Ca)[Al2Si6O16] · 5H2O |
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.
Internet Links for Clinoptilolite-K
mindat.org URL:
https://www.mindat.org/min-6883.html
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References for Clinoptilolite-K
Reference List:
Alberti, A. (1972) On the crystal structure of the zeolite heulandite. TMPM Tschermaks Mineralogische und Petrographische Mitteilungen, 18 (2). 129-146 doi:10.1007/bf01081798
Armbruster, Thomas (1993) Dehydration mechanism of clinoptilolite and heulandite: Single-crystal X-ray study of Na-poor, Ca-, K-, Mg-rich clinoptilolite at 100 K. American Mineralogist, 78 (3-4) 260-264
Coombs, Douglas S., Alberti, Alberto, Armbruster, Thomas, Artioli, Gilberto, Colella, Carmine, Galli, Ermanno, Grice, Joel D., Liebau, Friedrich, Mandarino, Joseph A., Minato, Hideo, Nickel, Ernest H., Passaglia, Elio, Peacor, Donald R., Quartieri, Simona, Rinaldi, Romano, Ross, Malcolm I., Sheppard, Richard A., Tillmanns, Ekkehart, Vezzalini, Giovanna (1997) Recommended nomenclature for zeolite minerals; report of the Subcommittee on Zeolites of the International Mineralogical Association, Commission on New Minerals and Mineral Names. The Canadian Mineralogist, 35 (6) 1571-1606
Localities for Clinoptilolite-K
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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).
All localities listed without proper references should be considered as questionable.
Bulgaria | |
| Encheva |
Canada | |
| Tillet collection |
Chile | |
| Atencio et al. (2012) +1 other reference |
China | |
| Shouting Zhang et al. (2004) |
Czech Republic | |
| Peter Fuchs |
Hungary | |
| WDS - Norbert Zajzon |
Japan | |
| Minato & Takano (1964) |
Mexico | |
| Megaw (2023) |
Russia | |
| Pavel M. Kartashov analytical data (1984) |
Spain | |
| Calvo (2018) |
USA | |
| RRUFF database specimen no.R110201 |
| Clays and Clay Minerals +1 other reference |
| Altaner et al. (1990) |
| Am. J. Sci. (1890) +2 other references |
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Hončova hůrka Hill, Skotnice, Nový Jičín District, Moravian-Silesian Region, Czech Republic