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The Relationship between the Thermal Behavior of Clinoptilolite and Its Chemical Composition

Published online by Cambridge University Press:  28 February 2024

Konstantinos P. Kitsopoulos
Konstantinos P. Kitsopoulos*
Affiliation:
Geology Department, Leicester University, Leicester LE1 7RH, UK
*
†Present address: 16 Aiolou Str., Paleo Faliro, Athens, 175-61, Greece
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Abstract

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The matrix of the Pliocene volcaniclastics from the Akrotiri area of the Santorini island (Greece) is dominated by clinoptilolite. Smectite, occasionally illite-smectite, opal-CT, cristobalite and mordenite are also present. The clinoptilolite-rich samples were heated at 460 and 560°C for 12 h and the reductions in the intensity of the 020 diffraction peak were measured. Electron microprobe analysis (EMPA) was then used to study the chemical composition of the clinoptilolite. Statistical analysis proved a strong and quantifiable relationship between the reduction of the 020 diffraction peak of the clinoptilolite and the Na/K ratio. A representative set of microprobe analyses of clinoptilolite was performed before any correlation with thermal behavior was attempted. The presence of K in the structure of clinoptilolite as well as its relationship with Na are most important in the thermal behavior of clinoptilolite.

Keywords

Chemical CompositionClinoptilolite020 Diffraction PeakElectron Microprobe AnalysisGreeceSantoriniZeolites
Type
Research Article
Information
Clays and Clay Minerals , Volume 49 , Issue 3 , June 2001 , pp. 236 - 243
Copyright
Copyright © 2001, The Clay Minerals Society

References

Alberti, A., 1975 The crystal structure of two clinoptilolites Tschermarks Mineralogische und Petragraphische Mitteilungen 22 25–37 10.1007/BF01081301.CrossRefGoogle Scholar
Alletti, A., 1972 Polymorphism and crystal-chemistry of heulandites and clinoptilolites American Mineralogist 57 1448–1462.Google Scholar
Alietti, A. Gottardi, G. and Poppi, L., 1974 The heat behavior of the cation exchanged zeolites with heulandite structure Tschermarks Mineralogische und Petrographische Mitteilungen 21 291–298 10.1007/BF01081037.CrossRefGoogle Scholar
Alietti, A. Brigarti, M.F. and Poppi, L., 1977 Natural Carichi clinoptilolites (heulandites of group 3): New data and review Neues Jahrbuch fur Mineralogie Monatshefte 11 493–501.Google Scholar
Armbruster, T., 1993 Dehydration mechanism of clinoptil-olite and heulandite: Single-crystal X-ray study of Na-poor, Ca-, K-, Mg-rich clinoptilolite at 100 K American Mineralogist 78 260–264.Google Scholar
Armbruster, T. and Gunter, M.E., 1991 Stepwise dehydration of heulandite-clinoptilolite from Succor Creek, Oregon, USA: A single-crystal X-ray study at 100 K American Mineralogist 76 1872–1883.Google Scholar
Bish, D.L., 1984 Effects of exchangeable cation composition on the thermal expansion/contraction of clinoptilolite Clays and Clay Minerals 32 444–452 10.1346/CCMN.1984.0320602.CrossRefGoogle Scholar
Bish, D.L., Kallo, D. and Sherry, H.S., 1988 Effects of composition on the dehydration behavior of clinoptilolite and heulandite Occurrence, Properties and Utilization of Natural Zeolites Budapest Akademiai Kiado 565–576.Google Scholar
Bish, D.L., Ming, D.W. and Mumpton, E. A., 1993 Thermal behavior of natural zeolites Natural Zeolites ’93: Occurrence, Properties, Use New York International Committee on Natural Zeolites, Brockport 259–269.Google Scholar
Boles, J.R., 1972 Composition, optical properties, cell dimensions, and thermal stability of some heulandite group zeolites American Mineralogist 57 1463–1493.Google Scholar
Boles, J.R. and Surdam, R.C., 1979 Diagenesis of volcano-genie sediments in a Tertiary saline lake; Wagon Bed Formation, Wyoming American Journal of Science 279 832–853 10.2475/ajs.279.7.832.CrossRefGoogle Scholar
Coombs, D.S. 1998 et al. , Recommended nomenclature for zeolite minerals: Report of the Subcommittee on Zeolites of the International Mineralogical Association, commission on New Minerals and Minerals Names European Journal of Mineralogy 10 1037–1081 10.1127/ejm/10/5/1037.CrossRefGoogle Scholar
Dunham, A.C. and Wilkinson, E.C.E., 1978 Accuracy, precision and detection limits of energy-dispersive electron-microprobe analyses of silicates X-Ray Spectrometry 7 50–56 10.1002/xrs.1300070203.CrossRefGoogle Scholar
Kitsopoulos, K.P., 1995 The mineralogy, geochemistry, physical properties and possible industrial applications of volcanic zeolitic tuffs from Santorini and Polyegos Islands Leicester, UK Greece. Ph.D. thesis, Leicester University.Google Scholar
Kitsopoulos, K.P., 1997 Genesis of heulandite group of minerals in pyroclastics (Santorini, Greece). Implications for models of zeolitization of volcaniclastic materials Zeolite ’97, 5th International Conference on the Occurrence, Properties, and Utilization of Natural Zeolites, Ischia (Naples, Italy), September 1997. Program and Abstracts Volume 195–197.Google Scholar
Kitsopoulos, K.P. and Dunham, A.C., 1998 Compositional variations of mordenite from Polyegos island, Greece: Na-Ca and K-rich mordenite European Journal of Mineralogy 10 569–577 10.1127/ejm/10/3/0569.CrossRefGoogle Scholar
Koyama, K. and Takeuchi, Y., 1977 Clinoptilolite: the distribution of potassium atoms and its role in thermal stability Zeitschrift fur Kristallographie 145 216–239.Google Scholar
Mason, B. and Sand, L.B., 1960 Clinoptilolite from Patagonia: The relationship between clinoptilolite and heulandite American Mineralogist 45 341–350.Google Scholar
Mumpton, F.A., 1960 Clinoptilolite redefined American Mineralogist 45 351–369.Google Scholar
Shepard, A.O. and Starkey, H.C., 1966 The effect of exchanged cations on the thermal behaviour of heulandite and clinoptilolite Mineralogical Society of India, IMA Volume 155–158.Google Scholar
Tsolis-Katagas, P. and Katagas, C., 1989 Zeolites in pre-caldera pyroclastic rocks of the Santorini Volcano, Aegean Sea, Greece Clays and Clay Minerals 37 497–510 10.1346/CCMN.1989.0370601.CrossRefGoogle Scholar