scholarly journals Er-Cr-Ge Ternary System

2019 ◽  
Vol 20 (4) ◽  
pp. 376-383
Author(s):  
M. Konyk ◽  
L. Romaka ◽  
Yu. Stadnyk ◽  
V.V. Romaka ◽  
R. Serkiz ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Isothermal Section ◽  
Ternary System ◽  
Electron Microprobe ◽  
Homogeneity Region ◽  
Space Group ◽  
X Ray ◽  
Type Space ◽  
Ternary Compounds ◽  
Pearson Symbol

The isothermal section of the phase diagram of the Er–Cr–Ge ternary system was constructed at 1070 K over the whole concentration range using X-ray diffractometry, metallography and electron microprobe (EPM) analysis. The interaction between the elements in the Er−Cr−Ge system results in the formation of two ternary compounds: ErCr6Ge6 (MgFe6Ge6-type, space group P6/mmm, Pearson symbol hP13; a = 5.15149(3), c = 8.26250(7) Ǻ; RBragg = 0.0493, RF = 0.0574) and ErCr1-хGe2 (CeNiSi2-type, space group Cmcm, Pearson symbol oS16, a = 4.10271(5), b = 15.66525(17), c = 3.99017(4) Ǻ; RBragg = 0.0473, RF = 0.0433) at investigated temperature. For the ErCr1-xGe2 compound, the homogeneity region was determined (ErCr0.28-0.38Ge2; a = 4.10271(5)-4.1418(9), b = 15.6652(1)-15.7581(4), c = 3.99017(4)-3.9291(1) Ǻ).

scholarly journals Phase equilibria in the Gd–Cr–Ge system at 1070 K

2021 ◽  
Vol 22 (2) ◽  
pp. 248-254
Author(s):  
M. Konyk ◽  
L. Romaka ◽  
Yu. Stadnyk ◽  
V.V. Romaka ◽  
V. Pashkevych
Keyword(s):  
Phase Diagram ◽  
Isothermal Section ◽  
Ternary System ◽  
Electron Microprobe ◽  
Structure Type ◽  
Space Group ◽  
X Ray ◽  
Type Space ◽  
Ternary Compounds ◽  
Pearson Symbol

The isothermal section of the phase diagram of the Gd–Cr–Ge ternary system was constructed at 1070 K over the whole concentration range using X-ray diffractometry, metallography and electron microprobe (EPM) analysis. Three ternary compounds are realized in the Gd–Cr–Ge system at the temperature of annealing: Gd117Cr52Ge112 (Tb117Fe52Ge112 structure type,  space group Fm-3m, Pearson symbol cF1124, a = 2.8971(6) nm), GdCr6Ge6 (SmMn6Sn6 structure type, space group P6/mmm, Pearson symbol hP16, a = 0.51797(2), c = 0.82901(4) nm) and GdCr1-хGe2 (CeNiSi2 structure type, space group Cmcm, Pearson symbol oS16, a = 0.41569(1)-0.41593(8), b = 1.60895(6)-1.60738(3), c = 0.40318(1)-0.40305(8) nm). For the GdCr1-xGe2 compound the homogeneity range was determined (x=0.73 – 0,69).

scholarly journals Isothermal section of the Ho–Cu–Sn ternary system at 670 K

2019 ◽  
Vol 19 (2) ◽  
pp. 139-146
Author(s):  
L. Romaka ◽  
I. Romaniv ◽  
V. Romaka ◽  
M. Konyk ◽  
A. Horyn ◽  
...  
Keyword(s):  
Solid Solution ◽  
Isothermal Section ◽  
Ternary System ◽  
Binary Compound ◽  
X Ray Diffraction ◽  
Interstitial Solid Solution ◽  
Space Group ◽  
X Ray ◽  
Type Space ◽  
Ternary Compounds

The interaction of the components in the Ho-Cu-Sn ternary system was investigated at 670 K over the whole concentration range using X-ray diffraction and EPM analyses. Four ternary compounds were formed in the Ho–Cu–Sn system at 670 K: HoCuSn (LiGaGe type, space group P63mc), Ho3Cu4Sn4 (Gd3Cu4Ge4-type, space group Immm), HoCu5Sn (CeCu5Au-type, space group Pnma), and Ho1.9Cu9.2Sn2.8 (Dy1.9Cu9.2Sn2.8-type, space group P63/mmc). The formation of the interstitial solid solution based on HoSn2 (ZrSi2-type) binary compound up to 5 at. % Cu was found.

scholarly journals Interaction of the components in the Gd-Mn-Sn ternary system at 873 and 673 K

2018 ◽  
Vol 19 (1) ◽  
pp. 60-65
Author(s):  
L. P. Romaka ◽  
Yu. V. Stadnyk ◽  
V. V. Romaka ◽  
M. Konyk ◽  
R. Serkiz
Keyword(s):  
Solid Solution ◽  
Ternary System ◽  
Substitutional Solid Solution ◽  
Structure Type ◽  
Binary Compound ◽  
Interstitial Solid Solution ◽  
Space Group ◽  
X Ray ◽  
Type Space ◽  
Ternary Compounds

The interaction of the components in the Gd-Mn-Sn ternary system was studied using the methods of X-ray and microstructure analyses, in the whole concentration range. The phase diagrams of the Gd-Mn-Sn system were constructed at 873 and 673 K. At both temperature of investigation the Gd-Mn-Sn system is characterized by existence of two ternary compounds: GdMn6Sn6 (MgFe6Ge6 structure type, space group P6/mmm) and Gd4Mn4Sn7 (Zr4Co4Ge7 structure type, space group I4/mmm). The formation of the interstitial solid solution GdMnхSn2 based on GdSn2 (ZrSi2-type) binary compound was found up to 10 at. % Mn at 873 K and 673 K. The existence of the substitutional solid solution based on GdMn2 (MgCu2-type) was observed up to 5 at.% Sn and 3 at. % Sn at 873 K and 673 K, respectively.

scholarly journals Phase equilibria in Ho-Fe-Sn ternary system at 670 K

2020 ◽  
Vol 21 (2) ◽  
pp. 272-278
Author(s):  
L. Romaka ◽  
Yu. Stadnyk ◽  
V. V. Romaka ◽  
A. Horpenyuk
Keyword(s):  
Phase Diagram ◽  
Solid Solution ◽  
Isothermal Section ◽  
Ternary System ◽  
Electron Microprobe ◽  
Microprobe Analysis ◽  
Electron Microprobe Analysis ◽  
Structure Type ◽  
Binary Compound ◽  
X Ray

Interaction between the components in the Ho-Fe-Sn ternary system was studied using X-ray diffractometry, metallography and electron microprobe analysis. Isothermal section of the phase diagram was constructed at 670 K over the whole concentration range. Component interaction in the Ho-Fe-Sn system at 670 K results in the existence of one ternary compound HoFe6Sn6 which crystallizes in the YCo6Ge6 structure type (space group P6/mmm, a=0.53797(2),   c= 0.44446(2) nm). The interstitial-type solid solution HoFexSn2 (up to 8 at.% Fe) based on the HoSn2 (ZrSi2-type structure) binary compound was found. Solubility of Sn in the HoFe2 binary (MgCu2 structure type) extends up to 5 at. %.

scholarly journals Isothermal section of the Ni-Mn-Sb ternary system at 773K

2019 ◽  
Vol 55 (2) ◽  
pp. 147-156 ◽  
Author(s):  
W.-Q. Ao ◽  
H.-Z. Yu ◽  
F.-L. Liu ◽  
F.-S. Liu ◽  
J.-Q. Li ◽  
...  
Keyword(s):  
Isothermal Section ◽  
Ternary System ◽  
Binary Systems ◽  
Type Structure ◽  
X Ray Diffraction ◽  
Energy Dispersion Spectroscopy ◽  
Heusler Compound ◽  
Space Group ◽  
Ternary Compounds ◽  
Binary Compounds

The isothermal section of the Ni-Mn-Sb ternary system at 773 K was measured by means of 117 alloys which were analyzed by using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersion spectroscopy (EDS), and electron probe microanalysis (EPMA) techniques. The existence of 7 binary compounds, namely NiMn, Mn2Sb, MnSb, NiSb2, NiSb, Ni5Sb2, Ni3Sb and 2 ternary compounds, namely Ni2MnSb and NiMnSb were confirmed for this isothermal section. The four binary compounds Ni3Sb (Cu3Ti structure, Pmmn space group), Ni5Sb2 (Ni5Sb2-type structure, C2 space group), NiSb2 (FeS2-type structure, Pnnm space group) and Mn2Sb (Cu2Sb-type structure, P4/nmm space group) in the binary systems Ni-Sb and Mn-Sb were stoichiometric compounds, the homogeneity ranges of which were negligible. However the five single phases in the Ni-Mn system and the two binary compounds MnSb and NiSb showed more or less homogeneity ranges formed by substitution of Mn and Sb for Ni atom. The Heusler compound ? (Ni2MnSb) has L21-type ordered structure with space group Fm-3m, a = 0.6017 nm. And the crystal structure for the Half-Heusler compound ? (NiMnSb) is C1b-type (F-43m) with a = 0.5961 nm. The approximate homogeneity ranges of the two ternary compounds ? and ? at 773 K were investigated.

The UCoAl ternary system: Phases formation and isothermal section of the phase diagram at 900 °C

2005 ◽  
Vol 7 (6) ◽  
pp. 780-783 ◽  
Author(s):  
Henri Noël ◽  
Olivier Tougait ◽  
Robert Troc ◽  
Vasyl Zaremba
Keyword(s):  
Phase Diagram ◽  
Isothermal Section ◽  
Ternary System

scholarly journals CRYSTAL STRUCTURE OF THE NEW SILICIDE Lu3Ni11.74(2)Si4

2020 ◽  
Vol 86 (5) ◽  
pp. 3-12
Author(s):  
Bohdana Belan ◽  
Mykola Manyako ◽  
Mariya Dzevenko ◽  
Dorota Kowalska ◽  
Roman Gladyshevskii
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Type Structure ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Arc Melting ◽  
Pearson Symbol ◽  
Ternary Silicide

The new ternary silicide Lu3Ni11.74(2)Si4 was synthesized from the elements by arc-melting and its crystal structure was determined by the single-crystal X-ray diffraction. The compound crystallizes in the Sc3Ni11Ge4-type: Pearson symbol hP37.2, space group P63/mmc (No. 194), a = 8.0985(16), c = 8.550(2) Å, Z = 2; R = 0.0244, wR = 0.0430 for 244 reflections. The silicide Lu3Ni11.74(2)Si4 is new member of the EuMg5.2-type structure family.

Crystal Structure of the Dy3Ni11.83Si3.98 Compound

2019 ◽  
Vol 289 ◽  
pp. 77-81
Author(s):  
Bohdana Belan ◽  
Mykola Manyako ◽  
Katarzyna Pasinska ◽  
Marta Demchyna ◽  
Roman E. Gladyshevskii
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Large Family ◽  
Type Structure ◽  
Single Crystal Diffraction ◽  
Space Group ◽  
X Ray ◽  
Arc Melting ◽  
Pearson Symbol ◽  
Ternary Silicide

The new ternary silicide Dy3Ni11.83(1)Si3.98(1)was synthesized from the elements by arc-melting and its crystal structure was determined by X-ray single-crystal diffraction. The compound crystallizes in a Sc3Ni11Ge4-type structure: Pearson symbolhP38, space groupP63/mmc(No. 194),a= 8.1990(7),c= 8.6840(7) Å,Z= 2;R= 0.0222, wR= 0.0284 for 365 reflections. The structure belongs to a large family of structures related to the EuMg5.2type, with representatives among ternary aluminides, silicides, germanides,etc.

scholarly journals Experimental Investigation and Thermodynamic Calculation of Ni–Al–La Ternary System in Nickel-Rich Region: A New Intermetallic Compound Ni2AlLa

Materials ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 2396 ◽  
Author(s):  
Jinfa Liao ◽  
Hang Wang ◽  
Tzu-Yu Chen
Keyword(s):  
Ternary System ◽  
Binary Systems ◽  
Ternary Phase ◽  
Ternary Systems ◽  
Rich Region ◽  
Space Group ◽  
X Ray ◽  
Selected Area Electron Diffraction ◽  
Backscattered Electron ◽  
Electron Imaging

The phase equilibrium of the Ni–Al–La ternary system in a nickel-rich region was observed at 800 °C and 1000 °C using scanning electron microscopy backscattered electron imaging, energy dispersive X-ray spectrometry and X-ray diffractometry. The solubility of Al in the Ni5La phase was remeasured at 800 °C and 1000 °C. Herein, we report a new ternary phase, termed Ni2AlLa, confirmed at 800 °C. Its X-ray diffraction (XRD) pattern was indexed and space group determined using Total Pattern Solution (TOPAS), and the suitable lattice parameters were fitted using the Pawley method and selected-area electron diffraction. Ni2AlLa crystallizes in the trigonal system with a space group R3 (no. 146), a = 4.1985 Å and c = 13.6626 Å. A self-consistent set of thermodynamic parameters for the Al–La and Ni–La binary systems and the Ni–Al–La ternary system includes a Ni2AlLa ternary phase, which was optimized using the CALPHAD method. The calculated thermodynamic and phase-equilibria data for the binary and ternary systems are consistent with the literature and measured data.

Ba5Al2Ge7 und Ba7Al4Ge9: Zwei neue intermetallische Phasen mit ungewöhnlichen Al-Ge-Anionen / Ba5Al2Ge7 and Ba7Al4Ge9: Two New Intermetallic Phases with Unusual Al-Ge Anions

2007 ◽  
Vol 62 (8) ◽  
pp. 1059-1070 ◽  
Author(s):  
Marco Wendorff ◽  
Caroline Röhr
Keyword(s):  
Ternary System ◽  
Single Crystal ◽  
Structure Type ◽  
Intermetallic Phases ◽  
Crystal Data ◽  
Form Complex ◽  
Space Group ◽  
X Ray ◽  
Al Content ◽  
Binary Section

In the ternary system Ba-Al-Ge new intermetallic compounds which are lying on or close to the binary section BaAl2 -BaGe2 were synthesized from the elements and characterized on the basis of X-ray single crystal data. The Al-content x in the compounds BaAlxGe2−x forming the AlB2 structure type ranges from x = 1.4 [BaAl1.4Ge0.6 space group P6/mmm, a = 443.5(1), c = 512.4(1) pm, Z = 1, R1 = 0.0222] to the stoichiometric ordered compound BaAlGe [space group P6̅m2, a = 434.9(1), c = 513.6 pm, Z = 1, R1 = 0.0252]. In the two new Ge-rich barium intermetallics Ba5Al2Ge7 [space group C2/m, a = 859.8(4), b = 1031.5(4), c = 1847.8(6) pm, β = 103.23(3)°, Z = 4, R1 = 0.0553] and Ba7Al4Ge9 [space group Fmm2, a = 1032.7(5), b = 2559(2), c = 862.1(4) pm, Z = 4, R1 = 0.1197] complex Al/Ge polyanions are present, which consist of (1) Al/Ge-ribbons of condensed planar sixmembered rings comparable to the anions in Ba3Al2Ge2, and (2) [Ge/Al]5 clusters comparable to the anions in the tetrelides Ba3M5. The building units (1) and (2) are connected via Al-Ge bonds to form complex ribbons in the case of Ba5Al2Ge7 and sheets in the case of Ba7Al4Ge9. The electron count in the two compounds supports an interpretation of the structures according to the Zintl concept and the Wades rules. The small formal electron excess, caused by the incomplete transfer of charge from Ba towards the Al/Ge polyanions, decreases with the Ge content of the compound.

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