Hostname: page-component-cd9895bd7-gbm5v Total loading time: 0 Render date: 2024-12-24T14:31:26.737Z Has data issue: false hasContentIssue false
  • English
  • Français

Structural intergrowth of merlinoite/phillipsite and its temperature-dependent dehydration behaviour: a single-crystal X-ray study

Published online by Cambridge University Press:  02 January 2018

Rosa Micaela Danisi ,
Thomas Armbruster  and
Mariko Nagashima
Rosa Micaela Danisi*
Affiliation:
Mineralogical Crystallography, Institute of Geological Sciences, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
Thomas Armbruster
Affiliation:
Mineralogical Crystallography, Institute of Geological Sciences, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
Mariko Nagashima
Affiliation:
Graduate School of Science and Engineering, Yamaguchi University, Yoshida 1677-1, Yamaguchi 753-8512, Japan
*
* E-mail: rosamicaela.danisi@libero.it
Get access Rights & Permissions [Opens in a new window]

Abstract

Supposed 'merlinoite' crystals from Monte Somma, Vesuvius (Italy) and Fosso Attici, north of Rome (Italy) represent highly twinned coherent intergrowths between merlinoite and phillipsite on a submicroscopic level. The MER (Immm, a ≈ 14.1, b ≈ 14.2, c ≈ 9.9 Å) and PHI (P 21/m, a ≈ 9.9, b ≈ 14.3, c ≈ 8.7 Å, β = 124.8°) frameworks of similar composition are assembled from identical tetrahedral units, though with a different connectivity. Coherent intergrowth and twinning of the two frameworks lead to P42/mnm pseudosymmetry, which is diagnostic of the intergrowth. Under ambient conditions merlinoite has Immm symmetry or I4/mmm if twinned. a low-symmetry model of space group P121/m1 (a ≈ 14.2, b ≈ 14.2, c ≈ 10 Å, β = 90°) allows structure refinement and quantification of the two frameworks.

Upon in situ dehydration to 250°C the evolution of the unit-cell volume of the Monte Somma merlinoite/phillipsite intergrowth displays an intermediate trend between previously studied pure merlinoite from the Khibiny massif (Russia) and Ba-rich phillipsite.

The Monte Somma crystal studied by temperature-dependent single-crystal X-ray diffraction methods also contained a subordinate chabazite inclusion with no coherent structural relationship to the merlinoite/phillipsite framework. Thus, the modification of the chabazite framework on dehydration could also be studied.

Keywords

zeolitemerlinoitephillipsitechabazitecrystal structuredehydrationintergrowth
Type
Research Article
Information
Mineralogical Magazine , Volume 79 , Issue 1 , February 2015 , pp. 191 - 203
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2015

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Bieniok, A., Bornholdt, K., Brendel, U. and Baur, W.H. (1996) Synthesis and crystal structure of zeolite W, resembling the mineral merlinoite. Journal of Materials Chemistry 6, 271-275.CrossRefGoogle Scholar
Bruker, (1999) SMART and SAINT-PLUS, Version 6.01 (1999). Bruker AXS Inc., Madison, Wisconsin, USA.Google Scholar
Della Ventura, G., Parodi, G.C. and Burragato, F. (1993) New data on merlinoite and related zeolites. Rendiconti Lincei Scienze Fisiche e Naturali, Ser. 9(4), 303-312.CrossRefGoogle Scholar
Galli, E., Gottardi, G. and Pongiluppi, D. (1979) The crystal structure of the zeolite merlinoite. Neues Jahrbuch für Mineralogie, Monatshefte 1979, 1-9.Google Scholar
Gatta, G.D., Cappelletti, P., Rotiroti, N., Slebodnik, C. and Rinaldi, R. (2009) New insights into the crystal structure and crystal chemistry of the zeolite phillipsite. American Mineralogist 94, 190-199.CrossRefGoogle Scholar
Pakhomova, A.S., Armbruster, T., Krivovichev, S.V. and Yakovenchuk, V.N. (2014) Dehydration of the zeolite merlinoite from the Khibiny massif, Russia: an in situ temperature-dependent single-crystal X-ray study. European Journal of Mineralogy 26, 371-380.CrossRefGoogle Scholar
Passaglia, E., Pongiluppi, D. and Rinaldi, R. (1977) Merlinoite, a new mineral of the zeolite group. Neues Jahrbuch für Mineralogie, Monatshefte 1977, 355-364.Google Scholar
Rinaldi, R., Pluth, J.J. and Smith, J.V. (1974) Zeolites of the phillipsite family. Refinement of the crystal structures of phillipsite and harmotome. Acta Crystallographica, B30, 2426-2433.CrossRefGoogle Scholar
Russo, M. and Preite, D. (2011) Merlinoite del Monte Somma. MICRO: Periodico dell’Associazione Micromineralogica Italiana, 2/2011, 64-65.Google Scholar
Sani, A., Cruciani, G. and Gualtieri, A.F. (2002) Dehydration dynamics of Ba-phillipsite: An in situ synchrotron powder diffraction study. Physics and Chemistry of Minerals 29, 351-361.CrossRefGoogle Scholar
Sato, M. and Gottardi, G. (1982) The slipping scheme of the double crankshaft structures in tectosilicates and its mineralogical implication. Zeitschrift für Kristallographie 161, 187-194.CrossRefGoogle Scholar
Sheldrick, G.M. (2008) A short history of SHELX. Acta Crystallographica, A64, 112-122.CrossRefGoogle Scholar
Sherman, J.D. (1977) Identification and characterization of zeolites synthesized in the K2O–A12O3–SiO2– H2O system: Pp. 30-42. in: Molecular Sieves II (J.R. Katzer, editor). Symposium Series 40, American Chemical Society, Washington, DC.CrossRefGoogle Scholar
Skofteland, B.M., Ellestad, O.H. and Lillerud, K.P. (2001) Potassium merlinoite: crystallization, structural and thermal properties. Microporous Mesoporous Materials 43, 61-71.CrossRefGoogle Scholar
Smith, J.V. (1968) Further discussion of framework structures built from four- and eight-membered rings. Mineralogical Magazine 38, 640-642.CrossRefGoogle Scholar
Smith, J.V. and Rinaldi, F. (1962) Framework structures from parallel four- and eight-membered rings. Mineralogical Magazine 32, 202-212.CrossRefGoogle Scholar
Steinfink, H. (1962) The crystal structure of the zeolite, phillipsite. Acta Crystallographica 15, 644-651.CrossRefGoogle Scholar
Tschernich, R.W. (1992) Zeolites of the World. Geoscience Press, Phoenix, Arizona, USA, 563 pp.Google Scholar
Yakubovich, O.V., Massa, W., Gavrilenko, P.G. and Pekov, I.V. (2005) Crystal structure of chabazite K. Crystallography Reports 50, 544-553.CrossRefGoogle Scholar
Zema, M., Tarantino, S.C. and Montagna, G. (2008) Hydration/dehydration and cation migration processes at high temperature in zeolite chabazite. Chemistry of Materials 20, 5876-5887.CrossRefGoogle Scholar
Supplementary material: File

Danisi et al. supplementary material

CIF merIRT

Download Danisi et al. supplementary material(File)
File 1.3 MB
Supplementary material: File

Danisi et al. supplementary material

CIF MerI250

Download Danisi et al. supplementary material(File)
File 1.9 MB
Supplementary material: File

Danisi et al. supplementary material

CIF Chaba50

Download Danisi et al. supplementary material(File)
File 1.1 MB
Supplementary material: File

Danisi et al. supplementary material

CIF Chaba125

Download Danisi et al. supplementary material(File)
File 1.1 MB
Supplementary material: File

Danisi et al. supplementary material

CIF Chaba150

Download Danisi et al. supplementary material(File)
File 992.9 KB
Supplementary material: File

Danisi et al. supplementary material

CIF Chaba250

Download Danisi et al. supplementary material(File)
File 998.8 KB