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paranatrolite

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Journal Article

Pressure-induced stabilization of ordered paranatrolite: A new insight into the paranatrolite controversy Available to Purchase

Yongjae Lee, Joseph A. Hriljac, John B. Parise, Thomas Vogt
Published: 01 January 2005
American Mineralogist (2005) 90 (1): 252–257.
DOI: https://doi.org/10.2138/am.2005.1588
...Yongjae Lee; Joseph A. Hriljac; John B. Parise; Thomas Vogt Abstract The origin and stability of paranatrolite (approximate formula Na 16– x Ca x Al 16+ x Si 24– x O 80 ·24H 2 O), a naturally occurring zeolite with the natrolite topology, has long been debated, with its detailed structure unknown...
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View PDF for article title, Pressure-induced stabilization of ordered <span class="search-highlight">paranatrolite</span>: A new insight into the <span class="search-highlight">paranatrolite</span> controversy
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Journal Article

The crystal structure of paranatrolite Available to Purchase

Yurii V. SERYOTKIN, Vladimir V. BAKAKIN, Igor A. BELITSKY
Published: 01 May 2004
European Journal of Mineralogy (2004) 16 (3): 545–550.
DOI: https://doi.org/10.1127/0935-1221/2004/0016-0545
...Yurii V. SERYOTKIN; Vladimir V. BAKAKIN; Igor A. BELITSKY Abstract Paranatrolite from the Khibiny massif, Kola Peninsula, Russia, Na 1.88 K 0.22 Ca 0.06 [Al 2.24 Si 2.76 O 10 ].3.1H 2 O, is monoclinic (space group Cc, Z = 4). For better comparison of this mineral with the related structure...
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Journal Article

The crystal structure of tetranatrolite from Mont Saint-Hilaire, Québec, and its chemical and structural relationship to paranatrolite and gonnardite Available to Purchase

Howard T. Evans, Jr., Judith A. Konnert, Malcolm Ross
Published: 01 November 2000
American Mineralogist (2000) 85 (11-12): 1808–1815.
DOI: https://doi.org/10.2138/am-2000-11-1225
... sites and x varies from approximately 0.3 to 3.2. Tetranatrolite is a dehydration product of paranatrolite and probably does not have a true stability field. Further understanding of the paragenesis of tetranatrolite was given by Chao (1980) . He found that the overgrowths on some of the Mont Saint...
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View PDF for article title, The crystal structure of tetranatrolite from Mont Saint-Hilaire, Québec, and its chemical and structural relationship to <span class="search-highlight">paranatrolite</span> and gonnardite
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Journal Article

Paranatrolite, a new zeolite from Mont St-Hilaire, Quebec Available to Purchase

G. Y. Chao
Published: 01 February 1980
The Canadian Mineralogist (1980) 18 (1): 85–88.
View PDF for article title, <span class="search-highlight">Paranatrolite</span>, a new zeolite from Mont St-Hilaire, Quebec
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Journal Article

The reversibility of the paranatrolitete-tranatrolite transformation Available to Purchase

Yurii V. Seryotkin, Vladimir V. Bakakin
Published: 01 July 2007
European Journal of Mineralogy (2007) 19 (4): 593–598.
DOI: https://doi.org/10.1127/0935-1221/2007/0019-1743
...Yurii V. Seryotkin; Vladimir V. Bakakin Abstract The problem of the reversibility of paranatrolite-tetranatrolite transformation is a key problem in understanding the paragenesis of the natrolite group zeolites. Two paranatrolite samples of different chemical composition were studied by X-ray...
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View PDF for article title, The reversibility of the paranatrolitete-tranatrolite transformation
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Journal Article

Pressure-induced hydration in zeolite tetranatrolite Available to Purchase

Yongjae Lee, Joseph A. Hriljac, John B. Parise, Thomas Vogt
Published: 01 February 2006
American Mineralogist (2006) 91 (2-3): 247–251.
DOI: https://doi.org/10.2138/am.2006.1847
...Yongjae Lee; Joseph A. Hriljac; John B. Parise; Thomas Vogt Abstract The tetranatrolite-paranatrolite transformation has remained a key problem in understanding the paragenesis of zeolites in the natrolite family. It is accepted that when paranatrolite, approximate formula Na 16− x Ca x Al 16+ x Si...
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Journal Article

Crystalline solution series and order-disorder within the natrolite mineral group Available to Purchase

Malcolm Ross, Marta J. K. Flohr, Daphne R. Ross
Published: 01 August 1992
American Mineralogist (1992) 77 (7-8): 685–703.
...Malcolm Ross; Marta J. K. Flohr; Daphne R. Ross Abstract The zeolite minerals of the natrolite group (natrolite, tetranatrolite, paranatrolite, mesolite, scolecite, thomsonite, gonnardite, edingtonite, and tetraedingtonite) have the general formula (Na,Ca,Ba) 8–16 (Al,Si) 40 O 80 · n H 2 O...
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Evolution of diffraction pattern for the sample Iversus temperature (bottom-up: heating from room temperature to 38 °C and subsequent cooling). Heating: monoclinic paranatrolite (a); monoclinic and tetragonal phases (b–d); tetragonal phase (e). Cooling: tetragonal phase (f); tetragonal and monoclinic phases (g–j); monoclinic paranatrolite after 24 hours in ambient conditions (k).

Evolution of diffraction pattern for the sample I versus temperature (bo... Available to Purchase

Published: 01 July 2007
Fig. 2. Evolution of diffraction pattern for the sample I versus temperature (bottom-up: heating from room temperature to 38 °C and subsequent cooling). Heating: monoclinic paranatrolite ( a ); monoclinic and tetragonal phases ( b–d ); tetragonal phase ( e ). Cooling: tetragonal phase ( f
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Crystal and experimental data of the paranatrolite structure. Available to Purchase

Published: 01 May 2004
Table 1. Crystal and experimental data of the paranatrolite structure.
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Na-O(Ow) and K-O(Ow) distances (Å) in paranatrolite. Available to Purchase

Published: 01 May 2004
Table 4. Na-O(Ow) and K-O(Ow) distances (Å) in paranatrolite.
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T-O bond lengths (Å) and T–O–T angles (°) in paranatrolite. Available to Purchase

Published: 01 May 2004
Table 3. T-O bond lengths (Å) and T–O–T angles (°) in paranatrolite.
Image
A projection of the paranatrolite structure along [001]. A part of the alternative Ow60, Ow7, and K positions are shown by broken circles. The Ψ angle of the chain rotation is shown to the right.

A projection of the paranatrolite structure along [001]. A part of the alte... Available to Purchase

Published: 01 May 2004
Fig. 1. A projection of the paranatrolite structure along [001]. A part of the alternative Ow60, Ow7, and K positions are shown by broken circles. The Ψ angle of the chain rotation is shown to the right.
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Coordination polyhedra of Na cations in the paranatrolite structure. (a) Trigonal O4(H2O)2 prisms typical for natrolite with the extra Na-Ow70 contacts; Na-O(Ow) distances are &lt; 3.1 Å. (b) Octahedra O3(H2O)3, Ow7 positions are vacant; Na-O(Ow) distances are &lt; 2.8 Å. (c) Octahedra O3(H2O)3, the alternative possibility - Ow60 positions are vacant.

Coordination polyhedra of Na cations in the paranatrolite structure. (a) Tr... Available to Purchase

Published: 01 May 2004
Fig. 2. Coordination polyhedra of Na cations in the paranatrolite structure. (a) Trigonal O 4 (H 2 O) 2 prisms typical for natrolite with the extra Na-Ow70 contacts; Na-O(Ow) distances are < 3.1 Å. (b) Octahedra O 3 (H 2 O) 3 , Ow7 positions are vacant; Na-O(Ow) distances are < 2.8 Å. (c
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Selected surroundings of H 2 O molecules and determined H bond lengths (Å)... Available to Purchase

Published: 01 May 2004
Table 5. Selected surroundings of H 2 O molecules and determined H bond lengths (Å) and angles (°) in paranatrolite.
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Atomic coordinates, equivalent isotropic displacement parameters U eq = 1/... Available to Purchase

Published: 01 May 2004
Table 2. Atomic coordinates, equivalent isotropic displacement parameters U eq = 1/3 ∑ I (∑ j (U ij a i * a j * a i a j )) (Å 2 ) and occupancies for paranatrolite.
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Experimental (points) and calculated (line) diffraction profiles of the wetted sample II. The tick marks indicate the positions of allowed Bragg peaks for the paranatrolite structure, space group F1d1.

Experimental (points) and calculated (line) diffraction profiles of the wet... Available to Purchase

Published: 01 July 2007
Fig. 6. Experimental (points) and calculated (line) diffraction profiles of the wetted sample II . The tick marks indicate the positions of allowed Bragg peaks for the paranatrolite structure, space group F 1 d 1.
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Experimental (points) and calculated (line) diffraction profiles of the sample I in ambient conditions. The tick marks indicate the positions of allowed Bragg peaks for the paranatrolite structure, space group F1d1.

Experimental (points) and calculated (line) diffraction profiles of the sam... Available to Purchase

Published: 01 July 2007
Fig. 1. Experimental (points) and calculated (line) diffraction profiles of the sample I in ambient conditions. The tick marks indicate the positions of allowed Bragg peaks for the paranatrolite structure, space group F 1 d 1.
Journal Article

Variable-temperature structural studies of tetranatrolite from Mt. Saint-Hilaire: Synchrotron X-ray powder diffraction and Rietveld analysis Available to Purchase

Yongjae Lee, Joseph A. Hriljac, Thomas Vogt
Published: 01 January 2005
American Mineralogist (2005) 90 (1): 247–251.
DOI: https://doi.org/10.2138/am.2005.1696
... at the framework T-sites. Paranatrolite is another natrolite analog with a high water content, Na 16– x Ca x Al 16+ x Si 24– x O 80 · n H 2 O or ideally Na 16 Al 16 Si 24 O 80 · n H 2 O, n ~ 24 ( Chao 1980 ; Ross et al. 1992 ). It is claimed to transform irreversibly to tetranatrolite upon exposure...
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View PDF for article title, Variable-temperature structural studies of tetranatrolite from Mt. Saint-Hilaire: Synchrotron X-ray powder diffraction and Rietveld analysis
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Journal Article

Structural evolution of natrolite during over-hydration : a high-pressure neutron diffraction study Available to Purchase

Yurii V. SERYOTKIN, Vladimir V. BAKAKIN, Boris A. FURSENKO, Igor A. BELITSKY, Werner JOSWIG, Paolo G. RADAELLI
Published: 01 March 2005
European Journal of Mineralogy (2005) 17 (2): 305–313.
DOI: https://doi.org/10.1127/0935-1221/2005/0017-0305
... such as natrolite Na 2 (H 2 O) 2 [Al 2 Si 3 O 10 ], mesolite Na 2 Ca 2 (H 2 O) 8 [Al 6 Si 9 O 30 ], scolecite Ca(H 2 O) 3 [Al 2 Si 3 O 10 ], and paranatrolite Na 2 K 0.25 (H 2 O) 3 [(Al,Si) 5 O 10 ], are characterized by a very flexible framework. This is clearly by the fact that “collapsed” dehydrated natrolite...
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View PDF for article title, Structural evolution of natrolite during over-hydration : a high-pressure neutron diffraction study
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Heat capacity of molecular H2O in various micro/nanoporous hydrous silicates and ice, liquid, and gaseous H2O: filled circles = cordierite, filled squares = analcime, filled triangles = mordenite, open circles = paranatrolite, plus signs = ice and liquid water, and open squares = gaseous H2O.

Heat capacity of molecular H 2 O in various micro/nanoporous hydrous silica... Available to Purchase

Published: 01 February 2007
F igure 8. Heat capacity of molecular H 2 O in various micro/nanoporous hydrous silicates and ice, liquid, and gaseous H 2 O: filled circles = cordierite, filled squares = analcime, filled triangles = mordenite, open circles = paranatrolite, plus signs = ice and liquid water, and open squares