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Phase equilibria in the Er-Co-In system and crystal structure of Er8CoIn3 compound

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Dzevenko M., Hamyk A., Tyvanchuk Y., Kalychak Y.
Open Chemistry
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2013
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vol. 11
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issue 4
604-609
EN
Isothermal section of the Er-Co-In system at T = 870 K was constructed by means of X-ray powder diffraction, microstructure, and EDX-analyses. Twelve ternary compounds, namely ErCoIn5 (HoCoGa5-type), Er6Co17.92In14 (Lu6Co17.92In14-type), ErCo4In (MgCu4Sn-type), Er2CoIn8 (Ho2CoGa8-type), Er10Co9In20 (Ho10Ni9In20-type), Er3Co1.87In4 (Lu3Co1.87In4-type), ErCoIn, Er11Co4In9 (Nd11Pd4In9-type), Er11Co3In6, Er8CoIn3 (Pr8CoGa3-type), Er6Co2.19In0.81 (Ho6Co2Ga-type), and Er13.83Co2.88In3.10 (Lu14Co2In3-type) exist in the Er-Co-In system at this temperature. The crystal structure of the Er8CoIn3 compound was determined by means of X-ray powder method (Pr8CoGa3-type, P63mc space group, a = 1.02374(2) nm, c = 0.68759(2) nm). Almost none of the binary compounds dissolve the third component. The exception is the existence of the solid solution based on ErCo3 binary compound, which dissolves up to 8 at.% of In. [...]
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The Ti-Fe-P system: phase equilibria and crystal structure of phases

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Toma O., Dzevenko M., Oliynyk A., Lomnytska Y.
Open Chemistry
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2013
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vol. 11
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issue 9
1518-1526
EN
Abstract Phase equilibria was investigated in the Ti-Fe-P system at T = 1070 K in the region 0–67 at.% of P, employing X-ray powder diffraction. The two ternary compounds, namely Ti0.5–0.8Fe1.5−1.2P (Co2Si-type; space group Pnma; a = 0.5964(2)–0.6011(3), b = 0.3575(3)–0.3600(1), c = 0.6828(2)–0.6882(2) nm) and Ti0.85−1.25Fe1.15−0.75P (ZrNiAl-type; space group P-62m; a = 0.6071(4)–0.6117(1), c = 0.3510(9)–0.3506(1) nm) exist in the Ti-Fe-P system at this temperature. The crystal structure of the Ti0.85–1.25Fe1.15−0.75P compound was additionally determined by X-ray single crystal diffraction on the phase with stoichiometric composition. The substitutions of Ti by Fe were observed for Ti5P3.16, Ti3P and TiP phases, and Fe for Ti in the case of Fe3P, Fe2P binary compounds. Graphical abstract [...]
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