scholarly journals The crystal structure of Sm4Ni11In20 and its relation to other indium-rich compounds

2014 ◽  
Vol 12 (2) ◽  
pp. 227-232 ◽  
Author(s):  
Yuriy Tyvanchuk ◽  
Volodymyr Svitlyk ◽  
Mykola Pustovoychenko ◽  
Yaroslav Kalychak
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Single Crystal Growth ◽  
Temperature Treatment ◽  
High Temperature Treatment ◽  
X Ray Diffraction ◽  
Coordination Polyhedra ◽  
Rare Earth Atom ◽  
X Ray ◽  
Arc Melting

AbstractPolycrystalline Sm4Ni11In20 was obtained by arc-melting of metal ingots. A subsequent high temperature treatment was used for single crystal growth. The Sm4Ni11In20 crystal structure (U4Ni11Ga20 type; C2/m, a = 22.5457(3) Å, b = 4.34929(5) Å, c = 16.5479(2) Å, β = 124.592(2)°, R1 = 0.0358, wR2 = 0.0934) was determined by single crystal synchrotron radiation X-ray diffraction from 2014 independent reflections with I > 2σ(I). Sm4Ni11In20 extends the R 4Ni11In20 (R = Y, Gd, Tb, Dy, Ho) series of phases. The R 4Ni11In20 and RNi3In6 (LaNi3In6 type; R = La, Ce, Pr, Nd, Eu) series have similar compositions. Their structures share similar fragments; in particular the rare earth atom coordination polyhedra are pentagonal prisms with additional atoms.

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.

Neue Strukturverfeinerung und Eigenschaften von Cr3C2/Structure Refinement and Properties of Cr3C2

2003 ◽  
Vol 58 (9) ◽  
pp. 929-933 ◽  
Author(s):  
Jochen Glaser ◽  
Ruth Schmitt ◽  
H.-Jürgen Meyer
Keyword(s):  
Crystal Structure ◽  
Electronic Structure ◽  
Single Crystal ◽  
Structure Refinement ◽  
X Ray Diffraction ◽  
X Ray ◽  
Arc Melting ◽  
Metal Atoms ◽  
Extended Hückel Calculations ◽  
Trigonal Prismatic

Cr3C2 was obtained from arc-melting of pellets made of carbon and chromium. The structure of Cr3C2 was determined by single crystal X-ray diffraction (Pnma, Z = 4, a = 553.99(6), b = 283.27(4), c = 1149.4(1) pm, R1 = 0.019 and wR2 = 0.037 for all collected reflections). The crystal structure contains isolated carbon atoms which reside inside of trigonal prismatic voids of metal atoms. The compound exhibits temperature independent paramagnetism. The electronic structure of Cr3C2 has been investigated using extended Hückel calculations.

Crystal structure of dicadmium(II) ethylenediphosphinetetraacetate octahydrate

1991 ◽  
Vol 56 (7) ◽  
pp. 1454-1460 ◽  
Author(s):  
Jaroslav Podlaha ◽  
Jana Podlahová
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Single Crystal ◽  
Diffraction Data ◽  
Title Compound ◽  
Water Molecules ◽  
X Ray Diffraction ◽  
Coordination Polyhedra ◽  
X Ray ◽  
Carboxylate Groups

The crystal structure of the title compound containing a phosphorus analogue of EDTA as the ligand was determined from single-crystal X-ray diffraction data and refined to R = 0.028 for 1 920 observed reflections. The crystals are monocyclic, space group P21/c,a = 8.6169(8), b = 16.0539(9), c = 8.2504(6)Å, β = 103.458(7)° and Z = 2. The structure is completely different from that of the nitrogen prototype, [CdEDTA]2-. It consists of double-stranded polymeric layers which are composed of metal coordination polyhedra linked by μ6-hexadentate ligands; the layers lie parallel to the bc plane and are joined along the a axis through hydrogen bonding donated by water molecules. Because of steric requirements of phosphorus, the coordination polyhedron around Cd is greatly distorted and can best be described as a 5 + 3 type. One P atom, two oxygen atoms from two monodentate carboxylate groups and two water molecules form an approximate trigonal bipyramid and further three more remote carboxylate oxygens complete the arrangement, resulting in an O7P distorted bicapped trigonal prism.

Single-crystal X-ray diffraction and electron-microscopy study of multiple-twinned Sr3(Ru0.336,Pt0.664)CuO6

2003 ◽  
Vol 59 (2) ◽  
pp. 182-189 ◽  
Author(s):  
Karen Friese ◽  
Lorenz Kienle ◽  
Viola Duppel ◽  
Hongmei Luo ◽  
Chengtian Lin
Keyword(s):  
Crystal Structure ◽  
Electron Microscopy ◽  
Single Crystal ◽  
Microscopy Study ◽  
Electron Microscopy Study ◽  
X Ray Diffraction ◽  
Threefold Axis ◽  
Coordination Polyhedra ◽  
X Ray ◽  
Twin Model

Sr_3(Ru_{0.336},Pt_{0.664})CuO_6 crystallizes as a monoclinic structure [space group R12/c; lattice parameters a = 9.595 (15), b = 9.595 (15), c = 11.193 (2) Å and \gamma = 120°]. The crystal structure is pseudotrigonal and the crystal investigated here by single-crystal X-ray diffraction was a multiple twin composed of six individuals. The twin laws are a combination of rhombohedral obverse/reverse twinning plus the threefold axis from the trigonal system. The crystal structure is related to the hexagonal perovskites. Each Pt/Ru atom is coordinated pseudo-octahedrally by O atoms, while the overall coordination polyhedra for Cu atoms can be regarded as a strongly distorted trigonal prism, where the Cu atom is clearly shifted from the center. Each [(Ru_{0.336},Pt_{0.664})O_6] octahedron is connected to two Cu—O polyhedra via a common edge, and thus chains are formed parallel to the crystallographic c axis. Sr^{2+} ions are incorporated between the chains and are coordinated by eight O atoms. All bond distances and angles are in good agreement with literature values. Electron-microscopy studies confirm the results from X-ray diffraction and all observed domain structures can be interpreted exactly with the established twin model. No indication of Pt/Ru ordering was found in either the X-ray or the electron-microscopy investigation.

Crystal structure of Sc3Co1.64In4 and Sc10Co9In20 from single-crystal data

2019 ◽  
Vol 74 (3) ◽  
pp. 289-295 ◽  
Author(s):  
Nataliya Gulay ◽  
Yuriy Tyvanchuk ◽  
Marek Daszkiewicz ◽  
Bohdan Stel’makhovych ◽  
Yaroslav Kalychak
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Crystal Structures ◽  
Diffraction Data ◽  
Crystal Data ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Arc Melting ◽  
Pure Metals

AbstractTwo compounds in the Sc-Co-In system were obtained by arc-melting of the pure metals and their crystal structures have been determined using single crystal X-ray diffraction data. The structure of Sc3Co1.64In4 (space group P6̅, а=7.6702(5), c=3.3595(2) Å, Z=1, R1=0.0160, wR2=0.0301) belongs to the Lu3Co2−xIn4 type structure, which is closely related to the ZrNiAl and Lu3CoGa5 types. The structure of Sc10Co9In20 (space group P4/nmm, а=12.8331(1), c=9.0226(1) Å, Z=2, R1=0.0203, wR2=0.0465) belongs to the Ho10Ni9In20 type, which is closely related to HfNiGa2.

Crystal structure of the new silicide LaNi11.8–11.4Si1.2–1.6

2021 ◽  
Vol 76 (3-4) ◽  
pp. 243-247
Author(s):  
Bohdana Belan ◽  
Tamara J. Bednarchuk ◽  
Vasyl Kinzhybalo ◽  
Mariya Dzevenko ◽  
Svitlana Pukas ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Intermetallic Compound ◽  
Single Crystal ◽  
Diffraction Data ◽  
Type Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structure Space ◽  
Arc Melting ◽  
Ternary Derivative

Abstract The intermetallic compound LaNi11.8–11.4Si1.2–1.6 was synthesized by arc-melting and its crystal structure was determined using powder and single-crystal X-ray diffraction data. The compound adopts the cubic CaCu6.5Al6.5-type structure (space group Fm 3 ‾ $\bar{3}$ c, Pearson code cF112, Z = 8), which is a partially ordered ternary derivative of the NaZn13 type: a = 11.256(4) Å, V = 1426.1(15) Å3, R = 0.0133, wR = 0.0285 for 93 reflections with I > 2 σ(I) for LaNi11.4Si1.6; a = 11.25486(8) Å, V = 1425.68(2) Å3, R p = 4.17%, R wp = 5.85%, R B = 3.44% for LaNi11.8Si1.2. One of its crystallographic positions (96i) is occupied by a mixture of Ni and Si atoms. The structure of this new silicide can be represented as a packing of Ni-centered icosahedra and La-centered snub cubes, which are packed in a CsCl-related manner.

scholarly journals The crystal structure of Ho4Ni11In20

2012 ◽  
Vol 10 (2) ◽  
pp. 354-359 ◽  
Author(s):  
Yuriy Tyvanchuk ◽  
Volodymyr Svitlyk ◽  
Yaroslav Kalychak
Keyword(s):  
Crystal Structure ◽  
Crystal Growth ◽  
High Temperature ◽  
Single Crystal ◽  
Three Dimensional ◽  
Single Crystal Growth ◽  
X Ray ◽  
Arc Melting ◽  
Dimensional Network ◽  
Type C

AbstractThe polycrystalline Ho4Ni11In20 was obtained by arc-melting of the elements. The subsequent high temperature procedure was used for single crystal growth. Crystal structure of the compound was investigated by X-ray single crystal method: U4Ni11Ga20 type, C 2/m, a = 22.4528(17), b = 4.2947(3), c = 16.5587(13) Å, β = 124.591(5)°, R1 = 0.0276, wR2 = 0.0493 for 1989 independent reflections with [I>2σ(I)]. The structure is composed of three-dimensional network from Ni and In atoms in which Ho atoms fill distorted pentagonal channels.

scholarly journals Single-crystal investigation of the compound SmNi5.2Mn6.8

2020 ◽  
Vol 75 (3) ◽  
pp. 303-307
Author(s):  
Bohdana Belan ◽  
Dorota Kowalska ◽  
Mykola Manyako ◽  
Mariya Dzevenko ◽  
Yaroslav Kalychak
Keyword(s):  
Crystal Structure ◽  
Intermetallic Compound ◽  
Single Crystal ◽  
Diffraction Data ◽  
Structure Type ◽  
Tetragonal Structure ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Arc Melting

AbstractThe intermetallic compound SmNi5.2Mn6.8 was synthesized by arc-melting and its crystal structure has been determined using single-crystal X-ray diffraction data. The compound adopts the tetragonal structure type ThMn12: space group I4/mmm, Pearson code tI26, Z = 2; a = 8.6528(3), c = 4.8635(3) Å; R1 = 0.0175, wR2 = 0.0372, 171 F2 values, 17 refined variables. The two crystallographic positions 8f and 8j in the structure of SmNi5.2Mn6.8 are occupied by a mixture of Mn and Ni atoms.

Crystal Structure of the Terbium Borocarbide Tb2B2C3

2008 ◽  
Vol 63 (8) ◽  
pp. 929-933 ◽  
Author(s):  
Volodymyr Babizhetskyy ◽  
Hansjürgen Mattausch ◽  
Arndt Simon
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Title Compound ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Arc Melting

The title compound was prepared from the elements by arc-melting followed by annealing in silica tubes at 1270 K for one week. The crystal structure was investigated by means of single-crystal X-ray diffraction: space group Cmmm, a = 3.412(1), b = 13.699(8), c = 3.669(1) Å, V = 171.5(1) Å3, Z = 2, R1 = 0.032; wR2 = 0.087 for 123 unique reflections with Io ≥ 2σ (Io) and 11 refined parameters.

Crystal structure of an inclusion complex between chiral monoaza-15-crown-5 and S(–)-1-phenyl-ethyl ammonium percholorate

2003 ◽  
Vol 218 (5) ◽  
Author(s):  
Süheyla Özbey ◽  
F. B. Kaynak ◽  
M. Toğrul ◽  
N. Demirel ◽  
H. Hoşgören
Keyword(s):  
Crystal Structure ◽  
Inclusion Complex ◽  
Single Crystal ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
New Type

AbstractA new type of inclusion complex, S(–)-1 phenyl ethyl ammonium percholorate complex of R-(–)-2-ethyl - N - benzyl - 4, 7, 10, 13 - tetraoxa -1- azacyclopentadecane, has been prepared and studied by NMR, IR and single crystal X-ray diffraction techniques. The compound crystallizes in space group

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