Study
of the crystallization fields of nickel(II) selenites in the system NiSeO3–SeO2–H2O |
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| Authors: | L T Vlaev Svetlana D Genieva Velyana G Georgieva |
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| Institution: | (1) Department Physical Chemistry, Assen Zlatarov University, Bourgas, Bulgaria, 8010 |
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| Abstract: | The solubility of NiSeO3–SeO2–H2O
system in the temperature region 298–573 K was studied. The compounds
of the three-component system were identified by the Schreinemakers’
method. The phase diagram of nickel(II) selenites was drawn and the crystallization
fields for the different phases were determined. Depending on the conditions
for hydrothermal synthesis, NiSeO3·2H2O,
α-NiSeO3·1/3H2O,
β-NiSeO3·1/3H2O,
NiSeO3 and NiSe2O5
were obtained. The different phases were proved and characterized by chemical,
powder X-ray diffraction and thermal analyses as well as IR spectroscopy. |
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| Keywords: | hydrothermal synthesis IR spectroscopy nickel(II)selenites powder X-ray diffraction solubility diagrams thermal analyses |
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