Yb3Cu6Sn5, Yb5Cu11Sn8 and Yb3Cu8Sn4: crystal structure of three ordered compounds
0
Citation
0
Reference
10
Related Paper
Keywords:
Orthorhombic crystal system
Diffractometer
Rietveld Refinement
Orthorhombic crystal system
Hexagonal phase
Space group
Cite
Citations (8)
Diffractometer
Crystal (programming language)
Diffraction topography
Cite
Citations (38)
The crystal structure of 1,1-bis-(p-chlorophenyl)-2,2,2-trichloroethane, (I), was determined from three-dimensional diffractometer data with 900 reflections. Z= 4 in the orthorhombic unit cell, space group Pca21 with dimensions, a= 996·3(1), b= 1920·0(2), and c= 788·7(1) pm. The structure was refined by least-squares to R 0·091. The crystal structure of 1-(o-chlorophenyl)-1-(p-chlorophenyl)trichloroethane, (II), was determined from three-dimensional diffractometer data with 2649 reflections by the symbolic addition procedure. Z= 4 in the triclinic unit cell, space group P, with dimensions a= 1201·6(1), b= 1248·1(1), c= 1093·8(1) pm, α= 105·43(3), β= 89·93(3), γ= 109·33(3)°. Least-squares refinement was halted at R 0·048. These two isomers resemble one another. The diameter and projected areas of the two apices and the overall heights are similar but the overall length and distance between the two electronegative centres are not.
Triclinic crystal system
Orthorhombic crystal system
Diffractometer
Crystal (programming language)
Cite
Citations (14)
Orthorhombic crystal system
Cite
Citations (95)
Optic orientation of orthorhombic Na2SO4(III) was determined as follows: X = c, Y = a and Z = b. The optic axial angle 2 Vc was measured to be ≈ 80°. The crystallographic phase transition of III into hexagonal I is discussed in the light of the optical data as well as our earlier single crystal X-ray work.
Orthorhombic crystal system
Crystal (programming language)
Hexagonal phase
Cite
Citations (2)
Crystals of the title compound are orthorhombic, space group P212121, a= 7·606(1), b= 9·540(1),c= 21.371(1)Å, Z= 4. The structure was solved from diffractometer data by Patterson and heavy-atom methods and refined by full-matrix least-squares to R 0·050 for 1687 independent reflexions. The results confirm the chirality (I) earlier deduced from chemical work and a positive Cotton effect.
Orthorhombic crystal system
Diffractometer
Absolute Configuration
Chirality
Crystal (programming language)
Matrix (chemical analysis)
Cite
Citations (16)
The crystal structure of the title compound (III) has been determined by three-dimensional X-ray diffraction methods from diffractometer data. The crystals are orthorhombic, a= 22·535, b= 12·332, c= 13·917 Å, Z= 4, space group, P212121. The structure was solved by heavy-atom and three-dimensional Fourier methods, and refined by least-squares calculations to a final R of 0·098 for 2318 independent observed reflexions. The absolute configuration was determined by tne anomalous dispersion method.
Orthorhombic crystal system
Diffractometer
Crystal (programming language)
Absolute Configuration
Cite
Citations (10)
The ternary compound LaCo2Al8 were prepared and studied by means of X-ray powder diffraction technique.The ternary compound LaCo2Al8 crystallizes in the orthorhombic CaCo2Al8-type structure with space group Pbam(No.55),the lattice parameters a=1.252 711(4) nm,b=1.441 71(5) nm,c=0.404 22(1) nm.The Smith and Snyder figure of merit is 152.0(45).The crystal structural refinement of the compound LaCo2Al8 was successfully performed by using Rietveld method from the X-ray diffraction data.The R-factors of Rietveld refinement are Rp =0.096 and Rwp =0.124,respectively.In the orthorhombic structure,La atoms occupy the 4g sites and Co atoms are located at other two different 4g sites,while Al atoms are at the five 4h,two 4g,2d and 2a sites,respectively.The reasonable bond lengths indicated that the obtained refined structure is correct.
Orthorhombic crystal system
Rietveld Refinement
Powder Diffraction
Lattice (music)
Cite
Citations (0)
Orthorhombic crystal system
Diffractometer
Crystal (programming language)
Cite
Citations (2)
Hexamminecobalt hexachloroantimonate (III), Co (NH3)6SbCl6, crystallizes in the orthorhombic space group Pbca (D$1.5\atop{2h}$ with unit cell parameters a = 11.50(3) Å, b = 11.53(3) Å and c = 11.51(2) Å. The observed and calculated densities were both found to be 2.19 g cm-3 wtih Z =4. Data were collected on an automated four-circle diffractometer equipped with scintillation counter using the θ-2θ step scan technique and Mo Kα radiation (λ = 0.71069 Å).
Orthorhombic crystal system
Diffractometer
Crystal (programming language)
Cite
Citations (0)