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Nomenclature of the hydrotalcite supergroup;natural layered double hydroxides
LDH layered double hydroxide hydrotalcite hydrotalcite supergroup brucite nomenclature manasseite sjo¨grenite barbertonite cyanophyllite fouge`rite treⅴbeurdenite.
2013/12/6
Layered double hydroxide (LDH) compounds are characterized by structures in which layers with a brucite-like structure carry a net positive charge, usually due to the partial substitution of trivalent...
Synthesis and characterisation of hydrotalcite from bauxite residue liquor and magnesium nitrate
Synthesis characterisation hydrotalcite bauxite residue liquor magnesium nitrate
2012/3/30
The extraction of alumina from bauxite by the Bayer process produces a slurry by-product referred to as ‘bauxite residue’ or ‘red mud’. The liquid component of the slurry is highly alkaline and requir...
Glyphosate-Hydrotalcite Interaction as Influenced by pH
Adsorption Adsorption Mechanism Calcined Hydrotalcite Glyphosate Hydrotalcite pH
2011/12/8
Abstract: Adsorption and the mechanism of adsorption of the herbicide glyphosate [N-(phosphonomethyl) glycine] by hydrotalcite (HT) and by hydrotalcite calcined at 500°C (HT500) was studied. The value...
Ambient-Temperature Synthesis, Evolution, and Characterization of Cobalt-Aluminum Hydrotalcite-Like Solids
Anionic Clay Cation Ordering Coprecipitation EXAFS Hydrotalcite ICP-MS Solubility Product TEM Metal Contamination Solid Solution Interstratification
2011/12/7
Abstract: Double hydroxide solids precipitated homogeneously from three laboratory-synthesized aqueous solutions that simulated mildly contaminated surface or groundwater. Over a limited pH range, pre...
Interlayer structure, anion dynamics, and phase transitions in mixed-metal layered hydroxides: Variable temperature 35Cl NMR spectroscopy of hydrotalcite and Ca-aluminate hydrate (hydrocalumite)
Cl -intercalated hydrotalcite Ca-aluminate hydrate Variable temperature
2012/3/31
The Cl NMR spectroscopy of Cl -intercalated hydrotalcite and the Ca-aluminate hydrate, the presence of
hydrocalumite (Friedel°Os salt) demonstrates dynamical behavior of interlayer C
dynamical orde...
Formation of Spinel from a Hydrotalcite-Like Compound at Low Temperature: Reaction between Edges of Crystallites
Double Hydroxide Grinding Hydrotalcite Reconstruction Spinel Thermal Decomposition
2011/12/23
Abstract: The thermal decomposition behavior of hydrotalcite-like compounds (HTlcs) prepared by reconstruction of calcined HTlcs is described. From the results of X-ray diffraction (XRD), it seems tha...
Decarbonation Behavior of Mg-Al-CO3 Hydrotalcite-like Compounds during Heat Treatment
Decarbonation Heat treatment Hydrotalcite
2011/12/28
Historically, the decarbonation of Mg-Al-CO3 hydrotalcite-like compounds (HTlc) has been thought to occur between 400° and 500°C. The present work demonstrates that when HTlcs having the maximum Al co...
Formation of Hydrotalcite-like Compounds During R7T7 Nuclear Waste Glass and Basaltic Glass Alteration
Basaltic glass Experimental alteration Hydrotalcite-like compounds MgCl2-CaCl2 salt solution R7T7 nuclear waste glass Saponite
2011/12/29
Alteration experiments have been performed using RTT7 and synthetic basaltic glasses in MgCl2-CaCl2 salt solution at 190∑C. The duration of experiments ranged from 0.25 to 463 days. The alteration pro...
Synthesis and Properties of Hexacyanoferrate Interlayered in Hydrotalcite. I. Hexacyanoferrate(II)
Anion exchange FTIR spectroscopy Hexacyanoferrate(II) Hydrotalcite Interlayer chemistry Layered double hydroxides Mossbauer spectroscopy
2011/12/28
Hydrotalcite (HT) interlayered with hexacyanoferrate(II) ions ([Mg4.62Al1.52(OH)12][(Fe(CN)6)0.30-(CO3)0.29]) has been synthesized from the carbonate-HT ([Mg4.52Al1.50(OH)12][(CO3)0.77]) through doubl...
Synthesis and CO2 Adsorption Features of a Hydrotalcite-Like Compound of the Mg2+-Al3+-Fe(CN)64- System with High Layer-Charge Density
Al3+-substitution CO2 adsorption Hydrotalcite-like compound Ion exchange
2011/12/30
Hydrotalcite-like compounds (HT) with 24%–48% Al3+-substitution have been synthesized in the Mg2+-Al3+-Fe(CN)64- system. Conditioning of the synthesized and air-dried compound with K4Fe(CN)64- solutio...
Polytype Diversity of the Hydrotalcite-Like Minerals II. Determination of the Polytypes of Experimentally Studied Varieties
Hydrotalcite-like group Polytype X-ray diffraction criteria
2011/12/30
Polytype diversity of hydrotalcite-like minerals is mainly a function of the nature of the interlayer anion. Among the varieties with CO32− anions, only two- and three-layer polylypes having the...
Polytype Diversity of the Hydrotalcite-Like Minerals I. Possible Polytypes and their Diffraction Features
Hydrotalcite-like group Polytype X-ray diffraction criteria
2011/12/30
All possible polytypes of hydrotalcite-like minerals with a periodicity along the c axis of one-, two- and three-layers, as well as the simplest six-layer polytypes, were derived on the basis of the c...
Electronic State of Iron Complexes in the Interlayer of Hydrotalcite-Like Materials
Anion exchange Infrared spectroscopy Hexacyanoferrate Hydrotalcite Intercalation Iron oxidation
2012/1/9
Infrared and Mössbauer spectroscopic studies were made on hydrotalcite-like materials, Mg6Al2(OH)16(NO3)2·4H2O, anion exchanged in aqueous solution of K3Fe(CN)6, K4Fe(CN)6·3H2O, or Na2Fe(CN)5NO·2...
Preparation and Characterization of Al-Rich Zn-Al Hydrotalcite-Like Compounds
Hydrotalcite Nuclear magnetic resonance Scanning-transmission electron microscopy Synthesis X-ray powder diffraction Zinc
2012/1/6
Hydrotalcite-like compounds, described by the formula [Zn1-xAlx(OH)2][(CO3)x/2 · nH2O], were prepared by coprecipitation methods at 80°C and characterized by bulk chemical analysis, X-ray powder diffr...
Properties of Hexacyanocobaltate(III)-Exchanged Hydrotalcite-Like Minerals
Adsorption Anion exchange Hexacyanocobaltate Hydrocarbons Hydrotalcite Intercalation
2012/1/5
Hydrotalcite-like minerals, containing Mg2+-Al3+-Xn- (Xn- = NO3-, Cl-, SO42-, or CrO42-), Zn2+-Al3+-NO3-, or Zn2+-Cr3+-NO3- ions, were intercalated with Co(CN)63- by an anion exchange method. For most...