scholarly journals Lu-V-{Ge, Sn} ternary systems

2019 ◽  
Vol 20 (1) ◽  
pp. 69-76
Author(s):  
L. Romaka ◽  
M. Konyk ◽  
Yu. Stadnyk ◽  
V. Romaka ◽  
R. Serkiz
Keyword(s):  
Solid Solution ◽  
Ternary Phase ◽  
Ternary Systems ◽  
Substitutional Solid Solution ◽  
Structure Type ◽  
X Ray Diffraction ◽  
Isothermal Sections ◽  
Space Group ◽  
Type Space ◽  
System A

The isothermal sections of the phase diagrams of the Lu–V–Ge and Lu-V-Sn ternary systems were constructed at 870 K over the whole concentration range using X-ray diffraction and EPM analyses. In the Lu-V-Ge system a formation of the substitutional solid solution Lu5Ge3-xVx based on the Lu5Ge3binary compound (Mn5Si3 structure type) was found up to 6 at. % V. Insertion of the V atoms in the structure of the LuGe2 binary germanide (ZrSi2structure type, up to 5 aт. % V) results in the formation of the LuV0,15Ge2 ternary phase (CeNiSi2 structure type, space group Cmcm, a=0.40210(4),b=1.5661(1), c=0.38876(3) nm), which corresponds to the limit composition of the interstitial solid solution LuVxGe2. The interaction between the elements in the Lu-V-Sn system results in the formation of one ternary compound LuV6Sn6 (SmMn6Sn6-type, space group P6/mmm, a=0.5503(2), c=0.9171(4) nm) at investigated temperature.

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 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.

Fehlende Glieder bekannter Reihen: Die Oxoferrate(III) Rb8[Fe2O7], Rb6[Fe2O6] und K4[Fe2O5] / Missing Links in Known Series: The Oxoferrates(III) Rb8[Fe2O7], Rb6[Fe2O6], and K4[Fe2O5]

2005 ◽  
Vol 60 (7) ◽  
pp. 732-740 ◽  
Author(s):  
Gero Frisch ◽  
Caroline Röhr
Keyword(s):  
Single Crystal ◽  
Structure Type ◽  
Potassium Ferrate ◽  
X Ray Diffraction ◽  
Marked Contrast ◽  
Ionic Radii ◽  
Space Group ◽  
X Ray ◽  
Type Space ◽  
Alkaline Cations

The title compounds were synthesized at temperatures between 775 and 1175 K from (mostly stoichiometric) mixtures of Fe2O3, elemental rubidium or potassium (A) and their hyperoxides AO2. The structures have been determined by single crystal X-ray diffraction. The alkaline rich ferrate(III) Rb8[Fe2O7] (Cs8[Fe2O7] structure type, space group P21/c, a = 696.7, b = 1722.1, c = 692.0 pm, β = 119.40°, Z = 2, R1 = 0.0496) exhibits diferrate anions [Fe2O7]8- composed of two vertexsharing [FeIIIO4] tetrahedra with a linear Fe-O-Fe bridge and nearly ideal 3m symmetry. This is in marked contrast to the Na homologue, where the diferrate anions are decidedly angular. In the series A3[FeO3], the anions in the compounds of the light alkaline cations are chains 1∞[FeO2O2/2]3−, but similar to the isotypic K6[Fe2O6] and to Cs6[Fe2O6] the new ferrate Rb6[Fe2O6] (K6Fe2O6 structure type, space group C2/m, a=741.8(2), b=1148.7(2), c=680.08(12) pm, β =103.65(2)°, Z = 4, R1 = 0.0370) contains isolated binuclear anions [O2FeO2FeO2]6− composed of two edge sharing [FeO4] tetrahedra. The new potassium ferrate of the series A4[Fe2O5], K4[Fe2O5] (space group P21/c, a = 645.91(14), b = 593.69(13), c = 1003.0(2) pm, β = 103.124(4)°, Z = 4, R1 = 0.0355), constitutes a new structure type, but its structure is still closely related to the Na compound, which crystallizes in the isomorphous subgroup P21/n with a doubled a axis. Both compounds are phylloferrates with layers 2∞[Fe2O5]4− consisting of six-membered rings of [FeO4] tetrahedra. In contrast, Rb4[Fe2O5] contains chains of vertex and edge sharing tetrahedra, so that in both series, A3[FeO3] and A4[Fe2O5], the linkedness of the ferrate tetrahedra increases with the ionic radii of the A counterions.

Solid State Phase Equilibria in the Er-Ni-P and Er-Ni-As Systems at 800 °C

2007 ◽  
Vol 62 (9) ◽  
pp. 1143-1152 ◽  
Author(s):  
Mariya Zelinska ◽  
Olga Zhak ◽  
Stepan Oryshchyn ◽  
Tetiana Polianska ◽  
Jean-Yves Pivan
Keyword(s):  
Solid State ◽  
Phase Equilibria ◽  
Single Crystal ◽  
Electron Probe ◽  
Ternary Systems ◽  
Structure Type ◽  
Hexagonal Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
System A

Solid-state phase equilibria in the ternary systems Er-Ni-P and Er-Ni-As have been determined at 800 °C (region 0 - 67 at.% P or 0 - 50 at.% As) using X-ray diffraction, scanning electron microscopy and electron probe microanalysis. Eight ternary phosphides and six ternary arsenides have been synthesized, including several phases reported previously. The hexagonal structure of the new compound Er6Ni20P13, as determined from single-crystal X-ray data, exhibits a new structure type closely related to the Ho6Ni20P13 structure. Two other new phosphides, Er16Ni36P22 (Tb16Ni36P22- type) and Er20Ni42P30 (Sm20Ni41.6P30-type), have also been obtained at 800 °C. In the Er-Ni-As system, a new arsenide Er20Ni42As30 (Sm20Ni41.6P30-type) has been found in addition to known ternary phases. From X-ray powder data, the structures of the ternary arsenides ErNi4As2 (ZrFe4Si2-type) and Er2Ni12As7 (Zr2Fe12P7-type) have been refined by Rietveld methods. In the single crystal investigations, two other new phases Er12Ni30P21 [derived (La, Ce)12Rh30P21-type] and Er13Ni25As19 (Tm13Ni25As19-type) have been prepared by high-temperature annealing (1500 °C).

Kristallstruktur von K4O(CN)2 / Crystal Structure of K4O(CN)2

1992 ◽  
Vol 47 (12) ◽  
pp. 1746-1748 ◽  
Author(s):  
Christian Hardt ◽  
Petra Vogt ◽  
Horst Sabrowsky
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Structure Type ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Type Space

Colorless K4O(CN)2 has been prepared. The compound crystallizes in the tetragonal anti-K2NiF4 structure type (space group I4/mmm) with a = 515.5(1) and c = 1606.7(3) pm, Z = 2. The structure was determined by single crystal X-ray diffraction, R = 3.35%.

Isothermal Sections of the U-Fe-Sb Ternary System

2012 ◽  
Vol 194 ◽  
pp. 21-25 ◽  
Author(s):  
Margarida S. Henriques ◽  
Thomas Malnoe ◽  
Olivier Tougait ◽  
Rui Vilar ◽  
Antonio Pereira Gonçalves
Keyword(s):  
Crystal Structure ◽  
Electron Microscopy ◽  
Solid Solution ◽  
Scanning Electron Microscopy ◽  
Ternary Phase ◽  
Energy Dispersive Spectrometry ◽  
X Ray Diffraction ◽  
Isothermal Sections ◽  
X Ray ◽  
Scanning Electron

A systematic study on the ternary uranium-iron-antimony was made at 700 and 750°C through powder X-ray diffraction and Scanning Electron Microscopy coupled with Energy Dispersive Spectrometry. The assessed sections confirmed the existence and crystal structure of the binary intermetallic compounds as well as the ternary phase UFeSb2. Moreover it was found that UFeSb2 is part of a solid solution, UFe1-xSb2, stable for 193Fe3-xSb4, crystallizing in the cubic type Y3Au3Sb4 and stable for 22

Crystal chemistry of the system Bi2O3–CdO–GeO2

1996 ◽  
Vol 11 (2) ◽  
pp. 80-84
Author(s):  
S. Wies ◽  
W. Eysel
Keyword(s):  
Phase Diagram ◽  
Solid Solution ◽  
Crystal Chemistry ◽  
Ternary Phase ◽  
Ternary Phase Diagram ◽  
Structure Type ◽  
Ternary Oxide ◽  
Isothermal Sections ◽  
X Ray ◽  
New Phase

The ternary phase diagram of the system Bi2O3-CdO-GeO2 was investigated in several isothermal sections using predominantly X-ray powder diffraction. The following phases are described with respect to their crystal chemistry, phase relations and powder patterns: Bi2−2xCd2x(O3−x⍽9+x) (solid solution with anti-α-AgI structure), CdGeO3 (complicated polymorphism), Bi12GeO20 (stoichiometric sillenite), Cd-sillenite (solid solution), Bi1.8Cd0.2GeO4.9 (metastable, new phase, new structure type with GeO5 polyhedra), Bi2CdGeO6 (new ternary oxide, new structure type).

Superstructure formation in the solid solution Sc3Pt3−xIn3 (x = 0–0.93)

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Nataliya L. Gulay ◽  
Rolf-Dieter Hoffmann ◽  
Jutta Kösters ◽  
Yaroslav M. Kalychak ◽  
Stefan Seidel ◽  
...  
Keyword(s):  
Solid Solution ◽  
Diffraction Data ◽  
High Frequency ◽  
Lattice Parameters ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Platinum Content ◽  
Arc Melting ◽  
Modulation Vector

Abstract The equiatomic indide ScPtIn (ZrNiAl type, space group P 6 ‾ $‾{6}$ 2m) shows an extended solid solution Sc3Pt3–xIn3. Several samples of the Sc3Pt3–xIn3 series were synthesized from the elements by arc-melting and subsequent annealing, or directly in a high frequency furnace. The lowest platinum content was observed for Sc3Pt2.072(3)In3. All samples were characterized by powder X-ray diffraction and their lattice parameters and several single crystals were studied on the basis of precise single crystal X-ray diffractometer data. The correct platinum occupancy parameters were refined from the diffraction data. Decreasing platinum content leads to decreasing a and c lattice parameters. Satellite reflections were observed for the Sc3Pt3–xIn3 crystals with x = 0.31–0.83. These satellite reflections could be described with a modulation vector ( 1 3 , 1 3 , γ ) $\left(\frac{1}{3},\frac{1}{3},\gamma \right)$ ( γ = 1 2 $\gamma =\frac{1}{2}$ c* for all crystals) and are compatible with trigonal symmetry. The interplay of platinum filled vs. empty In6 trigonal prisms is discussed for an approximant structure with space group P3m1.

Experimental and computational investigations of TiIrB: a new ternary boride with Ti1+x Rh2−x+y Ir3−y B3-type structure

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Jan P. Scheifers ◽  
Kate A. Gibson ◽  
Boniface P. T. Fokwa
Keyword(s):  
Density Functional ◽  
Ternary Phase ◽  
Structure Type ◽  
X Ray Diffraction ◽  
Functional Theory ◽  
Arc Melting ◽  
Ternary Boride ◽  
Charge Analysis ◽  
First Time ◽  
Bader Charge Analysis

Abstract A new ternary phase, TiIrB, was synthesized by arc-melting of the elements and characterized by powder X-ray diffraction. The compound crystallizes in the orthorhombic Ti1+x Rh2−x+y Ir3−y B3 structure type, space group Pbam (no. 55) with the lattice parameters a = 8.655(2), b = 15.020(2), and c = 3.2271(4) Å. Density Functional Theory (DFT) calculations were carried out to understand the electronic structure, including a Bader charge analysis. The charge distribution of TiIrB in the Ti1+x Rh2−x+y Ir3−y B3-type phase has been evaluated for the first time, and the results indicate that more electron density is transferred to the boron atoms in the zigzag B4 units than to isolated boron atoms.

Sign in / Sign up

Export Citation Format

Share Document