47 Result(s)
within
L. Szirtes
Inorganic Chemistry
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Article
Thermal treatment on tin(II/IV) oxalate, EDTA and sodium inositol-hexaphospate
The thermal behavior of tin containing oxalate, EDTA, and inositol-hexaphosphate were investigated. The end products of synthesis were identified by Mössbauer-, XRD analyses, and FTIR studies. The thermal deco...
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Article
Thermal behaviour of tin(II/IV) phosphates prepared by various methods
Tin(II/IV) phosphate was prepared by various synthetic methods. The different methods resulted in tin phosphate with different properties, i.e., different crystalline form and behaviour during thermal treatmen...
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Article
Thermal behaviour of transition-and tetravalentmetal oxides and phosphorous oxide composites
The mixed zirconium, titanium, hafnium and first-row transition metal oxides (containing phosphorous oxide) were prepared using ion exchange method followed by calcinations at 1020 K during 12 h. The resulted ...
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Article
Thermal treatment on composite γ-zirconium phosphate-silica
The prepared amorphous γ-ZrP\SiO2 composite had a complicated composition, since a part of γ-ZrP is converted to α-form during the exfoliation of it. The γ-ZrP\SiO2 composite have specific surface area of 421 m2g
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Article
Thermoanalytical characterization of vanadium-chromium oxide compounds prepared by 'soft chemistry' method
Hydrated microcrystalline compound, V1-xCrxOy·nH2O, where x<0.063 and 4.4<n<8 and hydrated amorphous phases, CrVO4·H2O and Cr2V4O13·4H2O have been prepared using peroxo-polyacids of vanadium and chromium. The tra...
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Article
Thermoanalytical investigation of crystalline layered hafnium salts
Transition metal containing hafnium phosphates forms has layered monoclinic structure. In general these materials have similar route of thermal decomposition; i.e. they loss their crystal water first then at a...
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Article
Thermoanalytical investigation of layered titanium salts
The investigated materials have similar routes of thermal decomposition; i.e. they lose their crystal water first, then at a higher temperature their structural one. At least the result TiP2O7 goes through a phas...
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Article
Thermal Decomposition of Hafnium Phosphate and Related Materials
The thermal decomposition of hafnium phosphate (both in amorphous and crystalline forms), molybdate and tungstate was investigated. Hafnium phosphate has a layered structure, that of molybdate and of tungstate...
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Article
Thermal Decomposition of Several Layered Zirconium Salts
The thermal decomposition of zirconium molybdate, tungstate and arsenate were investigated. The total mass losses of the investigated materials were 12.5, 11 and 8.5%, respectively. Despite having different cr...
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Article
Thermal Behaviour of Transition Metal-Containing Zirconium Phosphate
The thermal behaviour of Co(II), Ni(II) and Zn(II)-containing zirconium phosphate of α type was investigated. XRPD analysis revealed that, for the samples containing Co(II) or Ni(II), the first reflection of t...
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Article
FT-IR studies on intercalates and organic derivatives of crystalline (α- and γ-forms) zirconium phosphate and zirconium phosphate-phosphite
FT-IR studies were carried out for various α- and γ-crystalline intercalates of zirconium phosphate (ZrP) and also for zirconium phosphatephosphite (ZrPP). The characteristic peaks of n-alkanols, n-alkylamines...
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Article
Thermoanalytical Investigation of Several Layered Zirconium Salts and their Derivatives Part II
The comparison of data of thermal analysis partly with XRD and/or analytical results permits determination of the exact quantity of crystal water of the investigated samples having quite different behaviour. T...
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Article
Thermoanalyncal Investigation of Some Layered Zirconium Salts and Their Various Derivatives I.
The thermal behaviour of zirconium phosphate and its salt forms and also mixed zirconium-titanium phosphate were investigated. Based on TA data, in combination with other analytical results the composition, th...
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Article
Structural investigations on zirconium phosphate-phosphite and on itsn-butylamine intercalate
Zirconium phosphate-phosphite have various structure belonging to the drying heat of the sample. While sample dried above sat. NaCl solution had interlayer distance of 1.30 nm (result fromd 1=0.74 nm andd 2=0.56 ...
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Article
Investigations of crystalline structure of gamma-zirconium phosphate
The γ-crystalline form zirconium phosphate was investigated. For its lattice parameters was found:a=0.538 nm,b=0.664 nm,c=2.459 nm, β=94.2° and basal spacing (d)=1.22 nm. It was determined by IR spectrophotometri...
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Article
Structural modification of silica-containing α-zirconium phosphate
Silica-containing α-zirconium phosphate (α-ZrSiP) was prepared by the precipitation method. X-ray diffractometry was used to characterize α-ZrSiP and to compare it with other α-zirconium phosphates (ZrP). A mo...
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Article
Adsorption and microcalorimetric investigations ofn-butylamine intercalation in α- and γ-zirconium phosphates
The intercalation process ofn-butylamine was investigated. The adsorption ofn-butylamine in interlamellar space had stepwise character in case of both crystalline forms of zirconium phosphate. The intercalatedn-b...
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Article
Thermal behaviour of acidic salts of mixed tetravalent metals
The mixed amorphous glassy-type zirconium-titanium phosphates contain various quantities of adsorbed water per molecule unit. Pure zirconium phosphate lost the structural water in two steps. This character dis...
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Article
Thermal behaviour of acidic salts of mixed tetravalent metals
The mixed metal phosphates were synthetized by the HF method, the resulting materials being crystalline. Thermal analysis revealed that they contain almost one mole of crystalline water per molecule unit. The ...
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Article
Mixed insoluble acidic salts of tetravalent metals
Mixed amorphous glassy type hafnium-titanium phosphates have been prepared. The composition and ion exchange capacity of the samples were investigated before and after γ-irradiation. In addition, the effect of...
