A single-crystal investigation of the solid solution NiB48.5ofβ-rhombohedral boron type structure

The compounds Mg2Ni3P and Mg2Ni3As were prepared by heating the elements. Their structures have been determined from single-crystal X-ray data. The structure of the phosphide is a rhombohedral ternary variant of the cubic Laves structure type MgCu2 (R 3̄ m; hexagonal lattice constants: a = 4.971(0) Å, c = 10.961(2) Å). The ordered substitution of one quarter of the metal atoms by phosphorus and the resulting shorter distances are responsible for the rhombohedral symmetry.The arsenide crystallizes in the MgCu2 type structure (Fd 3 m; a = 6.891(1)A, composition Mg2Ni3As) with a statistic distribution of the Ni and As atoms; the relevant homogeneity range extends from Mg2Ni2.9As1.1 to Mg2Ni3.5As0.5.

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Verfeinerung der Kristallstruktur von Tripalladium-di-tetrathiophospliat Pd3(PS4)2 Refinement of the Crystal Structure of Tripalladium-di-tetrathiophosphate Pda3(PS4)2

Zeitschrift für Naturforschung B ◽

10.1515/znb-1983-0404 ◽

1983 ◽

Vol 38 (4) ◽

pp. 426-427 ◽

Cited By ~ 11

Author(s):

Arndt Simon ◽

Karl Peters ◽

Harry Hahn

Keyword(s):

Crystal Structure ◽

Single Crystal ◽

Title Compound ◽

Type Structure ◽

Tetrahedral Symmetry ◽

X Ray ◽

X Ray Crystallography ◽

Planar Environment

Abstract The structure of the title compound has been determined by X-ray crystallography. The title compound is synthesized from the elements at 600 °C. Its crystal structure, derived from powder data [3] is refined by single crystal diffractometer data. The structure is trigonal (P3̅ml, α = 684.1(1), c = 724.4(1) pm); Pd2+ cations and PS43- anions form a network with an anti-Claudetite (AS2O3) type structure. The PS4 units are distinctly distorted from ideal tetrahedral symmetry. The Pd atoms have a planar environment of 4 S atoms.

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Quaternary Equiatomic Compounds LnZnSbO (Ln = La - Nd, Sm) with ZrCuSiAs-Type Structure

Zeitschrift für Naturforschung B ◽

10.1515/znb-1997-1205 ◽

1997 ◽

Vol 52 (12) ◽

pp. 1467-1470 ◽

Cited By ~ 20

Author(s):

Petra Wollesen ◽

Joachim W. Kaiser ◽

Wolfgang Jeitschko

Keyword(s):

Zinc Oxide ◽

Single Crystal ◽

Chemical Bonding ◽

Type Structure ◽

Variable Parameters ◽

X Ray ◽

Structure Factors ◽

Cold Pressed

Abstract The five compounds LnZnSbO (Ln = La - Nd, Sm) were prepared by annealing cold-pressed pellets of the lanthanoids, zinc oxide, and antimony, or by reacting these components in a NaCl/KCl flux. They crystallize with the tetragonal ZrCuSiAs type structure, which was refined from single-crystal X-ray data of CeZnSbO : P 4/nmm, a = 419.76(4), c = 947.4(1) pm, Z = 2, R = 0.022 for 165 structure factors and 12 variable parameters. Chemical bonding in this and the formally isotypic compound CeZn1-xSb2 is briefly discussed.

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Struktur- und Phasenübergangsuntersuchungen an β-Li2ZnGe/ Structure and Phase Transition Investigations on β-Li2ZnGe

Zeitschrift für Naturforschung B ◽

10.1515/znb-1981-0805 ◽

1981 ◽

Vol 36 (8) ◽

pp. 917-921 ◽

Cited By ~ 16

Author(s):

Hans-Otto Cullmann ◽

Heinz-Walter Hinterkeuser ◽

Hans-Uwe Schuster

Keyword(s):

Phase Transition ◽

Thermal Analysis ◽

Differential Thermal Analysis ◽

Single Crystal ◽

Ternary Compound ◽

Type Structure ◽

Crystal Data ◽

Space Group ◽

Cell Parameters ◽

Structure Space

Abstract The ternary compound β-Li2ZnGe was prepared and its structure determined from powder and single crystal data. The compound crystallizes in a modified Na3As type structure, space group Ṗ̇̇̇̇̇̇̇̇̇̇̇̇̇̇3̄m 1 - D33d.The cell parameters are: a = 432.6 pm, c = 1647.0 pm, c/a= 3.83.A phase transition between a-and β-Li2ZnGe was found and the reaction of the elements lithium, zinc and germanium to a-Li2ZnGe was followed by differential thermal analysis. The temperatures and the enthalpies of transition and fusion were determined.

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Intermetallic REPtZn Compounds with TiNiSi-type Structure

Zeitschrift für Naturforschung B ◽

10.1515/znb-2011-0703 ◽

2011 ◽

Vol 66 (7) ◽

pp. 671-676 ◽

Cited By ~ 1

Author(s):

Trinath Mishra ◽

Rainer Pöttgen

Keyword(s):

Rare Earth ◽

Single Crystal ◽

Coordination Number ◽

High Frequency ◽

Three Dimensional ◽

Type Structure ◽

Rare Earth Compounds ◽

Crystal Data ◽

X Ray Diffraction ◽

X Ray

The equiatomic rare earth compounds REPtZn (RE = Y, Pr, Nd, Gd-Tm) were synthesized from the elements in sealed tantalum tubes by high-frequency melting at 1500 K followed by annealing at 1120 K and quenching. The samples were characterized by powder X-ray diffraction. The structures of four crystals were refined from single-crystal diffractometer data: TiNiSi type, Pnma, a = 707.1(1), b = 430.0(1), c = 812.4(1) pm, wR2 = 0.066, 602 F2, 21 variables for PrPt1.056Zn0.944; a = 695.2(1), b = 419.9(1), c = 804.8(1) pm, wR2 = 0.041, 522 F2, 21 variables for GdPt0.941Zn1.059; a = 688.2(1), b = 408.1(1), c = 812.5(1) pm, wR2 = 0.041, 497 F2, 22 variables for HoPt1.055Zn0.945; a = 686.9(1), b = 407.8(1), c = 810.4(1) pm, wR2 = 0.061, 779 F2, 20 variables for ErPtZn. The single-crystal data indicate small homogeneity ranges REPt1±xZn1±x. The platinum and zinc atoms build up three-dimensional [PtZn] networks (265 - 269 pm Pt-Zn in ErPtZn) in which the erbium atoms fill cages with coordination number 16 (6 Pt + 6 Zn + 4 Er). Bonding of the erbium atoms to the [PtZn] network proceeds via shorter RE-Pt distances, i. e. 288 - 293 pm in ErPtZn.

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

Ukrainian Chemistry Journal ◽

10.33609/2708-129x.86.5.2020.3-12 ◽

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.

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Influences of the γ′ Phase on the Mechanical Properties of a Nickel-Based Single Crystal Superalloy

Materials Science Forum ◽

10.4028/www.scientific.net/msf.1023.45 ◽

2021 ◽

Vol 1023 ◽

pp. 45-52

Author(s):

Xiao Yan Wang ◽

Meng Li ◽

Zhi Xun Wen

Keyword(s):

Mechanical Properties ◽

Solid Solution ◽

Single Crystal ◽

Tensile Properties ◽

Room Temperature ◽

Solution Treatment ◽

Single Crystal Superalloy ◽

Original Material ◽

Solid Solution Treatment ◽

The Matrix

After solid solution treatment at 1335°C for 4 hours and cooling to room temperature at different rate, the nickel-based single crystal superalloy were made into three kinds of nickel-based single crystal superalloy materials containing different size γ′ phases, respectively. The tensile test of I-shaped specimens was carried out at 980°C, and their effect of γ′ phase microstructure on the tensile properties was studied. The results show that the yielding strength of the material air-cooled to room temperature was lower than that with cooling rate at 0.15°C/s, but both of them were lower than the yielding strength of original material. Little difference was found on the elastic modulus of I-shaped specimens made of three kinds of materials. When the cubic degree of the γ′ phase is higher and the size is larger, the tensile properties of the material is better, which can be attributed to the larger size and narrower channel of the matrix phase that lead to higher dislocation resistance.

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The solid solution TbNiIn1−x Ga x

Zeitschrift für Naturforschung B ◽

10.1515/znb-2021-0167 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Myroslava Horiacha ◽

Galyna Nychyporuk ◽

Rainer Pöttgen ◽

Vasyl Zaremba

Keyword(s):

Solid Solution ◽

Unit Cell ◽

Type Structure ◽

X Ray Diffraction ◽

Unit Cell Parameters ◽

Space Group ◽

X Ray ◽

Cell Parameters ◽

Structure Space ◽

Arc Melting

Abstract Phase formation in the solid solution TbNiIn1−x Ga x at 873 K was investigated in the full concentration range by means of powder X-ray diffraction and EDX analysis. The samples were synthesized by arc-melting of the pure metals with subsequent annealing at 873 K for one month. The influence of the substitution of indium by gallium on the type of structure and solubility was studied. The solubility ranges have been determined and changes of the unit cell parameters were calculated on the basis of powder X-ray diffraction data: TbNiIn1–0.4Ga0–0.6 (ZrNiAl-type structure, space group P 6 ‾ 2 m $P‾{6}2m$ , a = 0.74461(8)–0.72711(17) and c = 0.37976(5)–0.37469(8) nm); TbNiIn0.2–0Ga0.8–1.0 (TiNiSi-type structure, space group Pnma, а = 0.68950(11)–0.68830(12), b = 0.43053(9)–0.42974(6), с = 0.74186(10)–0.73486(13) nm). The crystal structures of TbNiGa (TiNiSi type, Pnma, a = 0.69140(5), b = 0.43047(7), c = 0.73553(8) nm, wR2=0.0414, 525 F 2 values, 21 variables), TbNiIn0.83(1)Ga0.17(1) (ZrNiAl type, P 6 ‾ 2 m $P‾{6}2m$ , a = 0.74043(6), c = 0.37789(3) nm, wR2 = 0.0293, 322 F 2 values, 16 variables) and TbNiIn0.12(2)Ga0.88(2) (TiNiSi type, Pnma, a = 0.69124(6), b = 0.43134(9), c = 0.74232(11) nm, wR2 = 0.0495, 516 F 2 values, 21 variables) have been determined. The characteristics of the solid solutions and the variations of the unit cell parameters are briefly discussed.

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