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hydrocalumite

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Journal Article
Published: 01 July 2000
American Mineralogist (2000) 85 (7-8): 1046–1052.
...Andrey G. Kalinichev; R. James Kirkpatrick; Randall T. Cygan Abstract The dynamical behavior of Cl − and H 2 O molecules in the interlayer and on the (001) surface of the Ca-aluminate hydrate hydrocalumite (Friedel’s salt) over a range of temperatures from −100 to 300 ° C was studied using...
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Journal Article
Published: 01 August 1999
American Mineralogist (1999) 84 (7-8): 1186–1190.
...R. James Kirkpatrick; Ping Yu; Xiaoqiang Hou; Yeongkyoo Kim Abstract The 35 Cl NMR spectroscopy of Cl (super -) -intercalated hydrotalcite and the Ca-aluminate hydrate hydrocalumite (Friedel's salt) demonstrates dynamical behavior of interlayer Cl (super -) , the presence of dynamical order...
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Static  35 Cl NMR spectra of <b>hydrocalumite</b> collected at the indicated tempe...
Published: 01 July 2015
Figure 9 Static 35 Cl NMR spectra of hydrocalumite collected at the indicated temperatures. H 0 = 11.7 T. The change in peak shape between 0 and 10 °C reflects a structural phase transition. See text for discussion. After Kirkpatrick et al. (1999) .
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A snapshot of the simulation of <b>hydrocalumite</b>&#x2F;water interface at 25 ° C. Oc...
Published: 01 July 2000
F igure 1. A snapshot of the simulation of hydrocalumite/water interface at 25 ° C. Octahedra portray Al layers. Small spheres are Ca; larger spheres are Cl.
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Interlayer structure of <b>hydrocalumite</b> (view down the  c  direction): ( a ) ...
Published: 01 July 2000
F igure 2. Interlayer structure of hydrocalumite (view down the c direction): ( a ) ordered structure from the X-ray diffraction data interpretation ( Terzis et al. 1987 ); ( b ) a snapshot of the orientationally disordered structure resulting from the MD simulations at 0 ° C.
Journal Article
Published: 01 October 2012
Mineralogical Magazine (2012) 76 (5): 1289–1336.
...− as in the woodwardite group, and with additional interlayer H 2 O molecules that further expand the layer spacing to ~11 Å; (7) the wermlandite group, with a layer spacing of ~11 Å, in which cationic complexes occur with anions between the brucite-like layers; and (8) the hydrocalumite group, with M 2+ = Ca 2+ and M 3...
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Journal Article
Published: 01 May 2016
European Journal of Mineralogy (2016) 28 (2): 485–493.
... in altered xenoliths within alkaline basalts of the Bellerberg volcano, Eifel, Rhineland-Palatinate, Germany. Fluorellestadite, wadalite, andradite–schorlomite, perovskite, gehlenite, magnesioferrite, cuspidine, ettringite–thaumasite, hydrocalumite, jennite, katoite, and portlandite are the main associated...
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Journal Article
Published: 01 January 2015
European Journal of Mineralogy (2015) 27 (1): 113–122.
... minerals, hydrocalumite, bultfonteinite, and minerals of the katoite–grossular series are associated with chlorkyuygenite. Larnite, spurrite and galuskinite are noted as relics in Ca-humites. Chlorkyuygenite is colourless, occasionally with a greenish or yellowish tint, and the streak is white. The mineral...
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Journal Article
Published: 01 January 2015
European Journal of Mineralogy (2015) 27 (1): 123–136.
... and hydrocalumite. Fluormayenite and fluorkyuygenite crystals, usually < 20 μm in size, are colourless, in places with greenish or yellowish tint, the streak is white. Both minerals are transparent with a vitreous lustre; they do not show fluorescence. Fluormayenite and fluorkyuygenite are isotropic and have...
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Journal Article
Published: 01 May 2013
European Journal of Mineralogy (2013) 25 (2): 231–239.
..., bultfonteinite, ettringite group minerals, hillebrandite, afwillite, tobermorite-like minerals, hydrocalumite and hydrogrossular. Dzhuluite forms poikilitic crystals <50 μm in size that are light-yellow to dark-brown and with a creamy streak. The lustre is strongly vitreous. The calculated density...
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Journal Article
Published: 01 October 2011
Mineralogical Magazine (2011) 75 (5): 2563–2572.
.... Megawite is associated with spurrite, reinhardbraunsite, rondorfite, wadalite, srebrodolskite, lakargiite, perovskite, kerimasite, elbrusite-(Zr), periclase, hydroxylellestadite, hydrogrossular, ettringite-group minerals, afwillite, hydrocalumite and brucite. Megawite forms pale yellow or colourless...
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Journal Article
Published: 01 August 2010
American Mineralogist (2010) 95 (8-9): 1172–1181.
..., perovskite, lakargiite, ellestadite-(OH), hillebrandite, afwillite, hydrocalumite, ettringite group minerals, and hydrogrossular. Elbrusite-(Zr) forms grains up to 10–15 μm in size with dominant {110} and minor {211} forms. It often occurs as zones and spots within Fe 3+ -dominant kimzeyite crystals up to 20...
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Journal Article
Published: 01 July 2007
American Mineralogist (2007) 92 (7): 1105–1111.
... solution, both anorthite and gehlenite dissolved, and various minerals, including Li-ABW zeolite (Li 4 Al 6 Si 6 O 16 ·4H 2 O), hydrocalumite [Ca 2 Al(OH) 6 (Cl, OH)·3H 2 O], tobermorite [Ca 5 Si 6 O 16 (OH) 2 ·4H 2 O], katoite [Ca 3 Al 2 (SiO 4 )(OH) 8 ], and portlandite [Ca(OH) 2 ] formed. The products...
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Sevenfold-coordinated environment of a Ca atom in the hydroxide layer and t...
Published: 01 July 2000
F igure 5. Sevenfold-coordinated environment of a Ca atom in the hydroxide layer and the Ca-OH 2 electrostatic bonding in hydrocalumite.
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Spectral density of H 2 O molecular librations (hindered rotations) in the ...
Published: 01 July 2000
F igure 6. Spectral density of H 2 O molecular librations (hindered rotations) in the interlayer and on the surface of hydrocalumite.
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Computed low-frequency power spectra for the motion of Cl −  on the surface...
Published: 01 June 2005
F ig . 4. Computed low-frequency power spectra for the motion of Cl − on the surface of Ca(OH) 2 (inner-sphere and outer-sphere sites), on the surface and in the interlayer of hydrocalumite (Ca/Al LDH), and in bulk aqueous solution. The bands near 50 cm −1 involve mostly H-bond bending
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A typical MD modelling cell used in computations of surface interactions. T...
Published: 01 June 2005
F ig . 1. A typical MD modelling cell used in computations of surface interactions. The top and bottom crystal structures are hydrocalumite and the central region is water containing Cl − , SO 4 2− and Na + . The water layer is ~30 Å thick in this model.
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Example of Rietveld refinement of one of the CA samples studied. Angular re...
Published: 01 July 2013
positions corresponding to the following phases: from top to bottom: corundum (internal standard), hydrocalumite, quartz, calcite, amphibole, gypsum, belite β, chrysotile, and portlandite. In the enlarged portion of the low-angle region of the powder spectrum, from left to right, amphibole, hydrocalumite
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BSE image showing morphology of lakargiite aggregates (light). Points of mi...
Published: 01 November 2008
) Framboidal-like aggregate overgrown by larger crystals (fragment of lakargiite-hydrocalumite intergrowth with grain size of ca. 500 nm). ( f ) Pseudomorph of lakargiite after zircon. Lak = lakargiite, Wad = wadalite, Hcl = hydrocalumite, Spu = spurrite, Els = hydroxylellestadite, Ron = rondorfite, Rhb
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Computed positions of water molecules and Cl −  on mineral surfaces. ( a ) ...
Published: 01 June 2005
sheets of Mg(OH) 2 or Ca(OH) 2 and donating one H bond to it. These waters also typically have four NN H 2 O. ( c ) Cl − occupying the ‘Cl’ position on the surface of hydrocalumite. This position receives three H bonds from the surface and is located above a Ca that is displaced downwards from