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levyne

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Journal Article

Crystal structure of Ag-exchanged levyne intergrown with erionite: Single-crystal X-ray diffraction and Molecular Dynamics simulations

Georgia Cametti, Sergey V. Churakov
Published: 01 November 2020
American Mineralogist (2020) 105 (11): 1631–1638.
DOI: https://doi.org/10.2138/am-2020-7500
...Georgia Cametti; Sergey V. Churakov Abstract The modification of natural zeolites via ion exchange is an efficient technique used to improve their performances and tune their properties for specific applications. In this study, a natural levyne-Ca intergrown with erionite was fully exchanged by Ag...
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A new framework topology in the dehydrated form of zeolite levyne

Rossella Arletti, Giovanna Vezzalini, Simona Quartieri, Fernando Cámara, Matteo Alvaro
Published: 01 November 2013
American Mineralogist (2013) 98 (11-12): 2063–2074.
DOI: https://doi.org/10.2138/am.2013.4583
...Rossella Arletti; Giovanna Vezzalini; Simona Quartieri; Fernando Cámara; Matteo Alvaro Abstract The thermoelastic behavior and structural evolution of a natural levyne-Ca [(Ca 7.8 Na 2.2 K 1.1 ) ∑11.1 Al 20.0 Si 34.2 O 108 ·51.5H 2 O; R 3 m; a = 13.377(4) Å, c = 22.870(1) Å, V = 3544.1(3) Å 3...
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Crystal chemical and structural investigation of levyne-Na

P. Ballirano, G. Cametti
Published: 01 October 2013
Mineralogical Magazine (2013) 77 (7): 2887–2899.
DOI: https://doi.org/10.1180/minmag.2013.077.7.01
...P. Ballirano; G. Cametti Abstract A sample of levyne-Na from Dunseverick, Antrim, Northern Ireland, UK, has been characterized from the crystal chemical and structural point of view. Its mean crystal chemical formula, calculated on the basis of 54(Si+Al), is Na 7.72 Ca 4.62 K 1.31 Sr 0.08 Mg 0.02...
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Anomalous elastic behavior and high-pressure structural evolution of zeolite levyne

Giacomo Diego Gatta, Paola Comodi, Pier Francesco Zanazzi, Tiziana Boffa Ballaran
Published: 01 April 2005
American Mineralogist (2005) 90 (4): 645–652.
DOI: https://doi.org/10.2138/am.2005.1768
...Giacomo Diego Gatta; Paola Comodi; Pier Francesco Zanazzi; Tiziana Boffa Ballaran Abstract Elastic behavior and high-pressure (HP) structural evolution of a natural zeolite levyne, (Ca 0.5 ,Na,K) 6 (Al 6 Si 12 O 36 )·18H 2 O, has been investigated up to 5 GPa by means of in situ single-crystal X...
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Levyne from Dozen (Oki Islands), Japan

T. Tiba, S. Matsubara
Published: 01 November 1977
The Canadian Mineralogist (1977) 15 (4): 536–539.
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The chemical compositions and origin of the zeolites offretite, erionite, and levyne

W. S. Wise, R. W. Tschernich
Published: 01 October 1976
American Mineralogist (1976) 61 (9-10): 853–863.
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Levyne-offretite intergrowths from basalt near Beech Creek, Grant County, Oregon

Richard A. Sheppard, Arthur J. Gude, 3rd, George A. Desborough, John S. White, Jr.
Published: 01 August 1974
American Mineralogist (1974) 59 (7-8): 837–842.
...Richard A. Sheppard; Arthur J. Gude, 3rd; George A. Desborough; John S. White, Jr. Abstract Intergrowths of levyne and offretite occur in vesicles of the Picture Gorge Basalt near Beech Creek, Oregon. Levyne occurs as aggregates of thin, platy crystals, and the offretite occurs as white, silky...
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Projection along [001] of <span class="search-highlight">levyne</span> structure ( a ) and view of extraframework...

Projection along [001] of levyne structure ( a ) and view of extraframework...

Published: 01 November 2013
Figure 1 Projection along [001] of levyne structure ( a ) and view of extraframework sites in the levyne cages ( b ) at RT.
Image
R = Si&#x2F;(Si+Al) vs. K&#x2F;Σexchangeable cations in <span class="search-highlight">levynes</span> (circles) and over...

R = Si/(Si+Al) vs. K/Σexchangeable cations in levynes (circles) and over...

Published: 01 October 2013
F ig . 3. R = Si/(Si+Al) vs. K/Σexchangeable cations in levynes (circles) and over/intergrown erionites (squares). Present work: levyne-Na, grey triangle; erionite-Na, black triangle.
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SEM BSD images of <span class="search-highlight">levyne</span>-erionite intergrowths. (Color online.)

SEM BSD images of levyne-erionite intergrowths. (Color online.)

Published: 01 November 2020
Figure 1. SEM BSD images of levyne-erionite intergrowths. (Color online.)
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Crystal structure of Ag-<span class="search-highlight">levyne</span> projected along [110]. Blue spheres represen...

Crystal structure of Ag-levyne projected along [110]. Blue spheres represen...

Published: 01 November 2020
Figure 2. Crystal structure of Ag-levyne projected along [110]. Blue spheres represent the (Si, Al) tetrahedral sites, silver and oxygen atoms are displayed in gray and red, respectively. Partially colored spheres correspond to partial occupancy of the crystallographic sites. The yellow line
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A snapshot of Ag-<span class="search-highlight">levyne</span> structure after 18 ps MD simulation. Color code as ...

A snapshot of Ag-levyne structure after 18 ps MD simulation. Color code as ...

Published: 01 November 2020
Figure 3. A snapshot of Ag-levyne structure after 18 ps MD simulation. Color code as in Figure 2 . Al-occupied tetrahedral sites are shown as dark cyan spheres. Ag-O bonds are shown with gray lines. (Color online.)
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Perspective view of the simulated (11 ps) Ag-<span class="search-highlight">levyne</span> supercell with 2 H 2 O ...

Perspective view of the simulated (11 ps) Ag-levyne supercell with 2 H 2 O ...

Published: 01 November 2020
Figure 7. Perspective view of the simulated (11 ps) Ag-levyne supercell with 2 H 2 O per Ag ions. Color code as in Figure 3 . Ag ions are not found in the D6R cages. (Color online.)
Journal Article

Crystal chemistry of the zeolites erionite and offretite

E. Passaglia, G. Artioli, A. Gualtieri
Published: 01 June 1998
American Mineralogist (1998) 83 (5-6): 577–589.
DOI: https://doi.org/10.2138/am-1998-5-618
... for identification purposes; (6) the zeolite mineral species epitaxially overgrown on levyne in all cases is identified as erionite; in a few cases offretite was found to be overgrown on chabazite; (7) erionite samples epitaxially overgrown on levyne are substantially more Al-rich and Mg-poor than the erionite...
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Structure of <span class="search-highlight">levyne</span> B : ( a ) LEV framework; ( b ) new topology.

Structure of levyne B : ( a ) LEV framework; ( b ) new topology.

Published: 01 November 2013
Figure 7 Structure of levyne B : ( a ) LEV framework; ( b ) new topology.
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( a ) Double six-membered ring-unit in the <span class="search-highlight">levyne</span> framework and the P -ind...

( a ) Double six-membered ring-unit in the levyne framework and the P -ind...

Published: 01 April 2014
F ig . 3. ( a ) Double six-membered ring-unit in the levyne framework and the P -induced mechanism at P <0.8 GPa, which leads to an expansion of the framework along [0001]. ( b ) LEV framework; the double six-membered rings are highlightened in green rectangles and the ‘joint-units
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Plot of normalized unit-cell parameters of <span class="search-highlight">levyne</span> vs. temperature for SC-XR...

Plot of normalized unit-cell parameters of levyne vs. temperature for SC-XR...

Published: 01 November 2013
Figure 2 Plot of normalized unit-cell parameters of levyne vs. temperature for SC-XRD and SR-XRPD experiments. Numbers 1–5 indicate the cell volume sequence from SC-XRD isothermal data collections at 225 and 250 °C. Points 2 and 3 are almost overlapped.
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X-ray powder diffraction patterns collected on <span class="search-highlight">levyne</span> at RT, 266, and 458 °...

X-ray powder diffraction patterns collected on levyne at RT, 266, and 458 °...

Published: 01 November 2013
Figure 3 X-ray powder diffraction patterns collected on levyne at RT, 266, and 458 °C in the range 3–20 °2Θ.
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Thermogravimetric analyses performed on natural <span class="search-highlight">levyne</span> (solid line) and on ...

Thermogravimetric analyses performed on natural levyne (solid line) and on ...

Published: 01 November 2013
Figure 8 Thermogravimetric analyses performed on natural levyne (solid line) and on the dehydrated/rehydrated sample (dotted line).
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Compositional triangular plot indicating the EF content of <span class="search-highlight">levyne</span>-Na sample...

Compositional triangular plot indicating the EF content of levyne-Na sample...

Published: 01 October 2013
F ig . 2. Compositional triangular plot indicating the EF content of levyne-Na samples. Labels as defined in Table 5 . PW = present work. The grey contour indicates the compositional dispersion of the individual analytical points, shown as black dots.