. "P(ME 351), Z(MSM 153100007)" . . . . . . . . "The role of intermediates in the process of red ferric pigment manufacture from FeSO4 center dot 7H(2)O" . "9"^^ . "The role of intermediates in the process of red ferric pigment manufacture from FeSO4 center dot 7H(2)O"@en . . "NL - Nizozemsko" . "Ma\u0161l\u00E1\u0148, Miroslav" . "Role meziprodukt\u016F v procesu v\u00FDroby \u010Derven\u00E9ho \u017Eelezit\u00E9ho pigmentu z FeSO4.7H(2)O"@cs . "The role of intermediates in the process of red ferric pigment manufacture from FeSO4 center dot 7H(2)O"@en . "3"^^ . . "139/140" . "0304-3843" . . . "15310" . . "RIV/61989592:15310/02:00007752!RIV09-MSM-15310___" . . "[B4AD54068056]" . . "Jedna z metod pr\u016Fmyslov\u00E9 p\u0159\u00EDpravy \u010Derven\u00FDch \u017Eelezit\u00FDch pigment\u016F je zalo\u017Eena na tepeln\u00E9m rozkladu FeSO4.7H2O na alfa-Fe2O3. Hlavn\u00EDm probl\u00E9mem vyu\u017Eit\u00ED tohoto procesu je udr\u017Een\u00ED pot\u0159ebn\u00E9 barevn\u00E9 kvality. Jedn\u00EDm z faktor\u016F je ovlivn\u011Bn\u00ED barevn\u00E9 kvality meziprodukty. Dv\u011B skupiny meziprodukt\u016F byly identifikov\u00E1ny prost\u0159ednictv\u00EDm M\u00F6ssbauerovy spektroskopie a rentgenov\u00E9 pr\u00E1\u0161kov\u00E9 anal\u00FDzy. Byl nalezen v\u00FDrazn\u00FD vliv beta-Fe2O3 na barvu pigment\u016F."@cs . . "FeSO4.7H(2)O; thermal decomposition; intermediate; Mossbauer spectroscopy; red pigment; iron oxide decomposition; mechanism; oxidation; behaviour"@en . "5"^^ . . . . "N" . "The role of intermediates in the process of red ferric pigment manufacture from FeSO4 center dot 7H(2)O" . . "Role meziprodukt\u016F v procesu v\u00FDroby \u010Derven\u00E9ho \u017Eelezit\u00E9ho pigmentu z FeSO4.7H(2)O"@cs . "Hyperfine Interactions" . "662637" . . "One method of industrial manufacture of red ferric pigments is based on the thermal decomposition of FeSO4.7H(2)O into alpha Fe2O3(copperas red). The difficult reproducibility of the color quality of the final pigment is the main problem of this process. One of the factors that can influence the pigment color is contamination by some of the intermediates formed during the transformation process. The identification of two groups of intermediates is the basic result of an extensive laboratory investigation carried out using Fe-57 Mossbauer spectroscopy and X-ray powder diffraction (XRD). The first group of intermediates includes sulfato-phases as FeSO4.H2O, FeSO4, Fe(OH) SO4, Fe2O(SO4)(2), Fe2O(SO4)(2).xH(2)O xis an element of(0, 1), and Fe-2(SO4)(3). Thermally metastable polymorphs of iron(III) oxide, beta-Fe2O3, gamma-Fe2O3 and epsilon-Fe2O3, represent the other group. Mossbauer characterization of all intermediate products is given. A significant influence of beta-Fe2O3 on the pigment color was found" . . "Petridis, Dimitris" . "Krausov\u00E1, Dagmar" . "Zbo\u0159il, Radek" . "Pikal, Petr" . . "RIV/61989592:15310/02:00007752" . "One method of industrial manufacture of red ferric pigments is based on the thermal decomposition of FeSO4.7H(2)O into alpha Fe2O3(copperas red). The difficult reproducibility of the color quality of the final pigment is the main problem of this process. One of the factors that can influence the pigment color is contamination by some of the intermediates formed during the transformation process. The identification of two groups of intermediates is the basic result of an extensive laboratory investigation carried out using Fe-57 Mossbauer spectroscopy and X-ray powder diffraction (XRD). The first group of intermediates includes sulfato-phases as FeSO4.H2O, FeSO4, Fe(OH) SO4, Fe2O(SO4)(2), Fe2O(SO4)(2).xH(2)O xis an element of(0, 1), and Fe-2(SO4)(3). Thermally metastable polymorphs of iron(III) oxide, beta-Fe2O3, gamma-Fe2O3 and epsilon-Fe2O3, represent the other group. Mossbauer characterization of all intermediate products is given. A significant influence of beta-Fe2O3 on the pigment color was found"@en . . .