◾ Orthorhombic Crystal System: Polyethylene

2014 ◽  
pp. 500-523
Keyword(s):  
Orthorhombic Crystal System ◽  
Orthorhombic Crystal ◽  
Crystal System

scholarly journals Crystal Structure, Spectral Studies, and Hirshfeld Surfaces Analysis of 5-Methyl-5H-dibenzo[b,f]azepine and 5-(4-Methylbenzyl)-5H-dibenzo[b,f]azepine

2014 ◽  
Vol 2014 ◽  
pp. 1-9
Author(s):  
Madan Kumar Shankar ◽  
Basavapattana C. Manjunath ◽  
Koravangala Shivakumar Vinay Kumar ◽  
Kudigana J. Pampa ◽  
Marilinganadoddi P. Sadashiva ◽  
...  
Keyword(s):  
Diffraction Method ◽  
Spectral Studies ◽  
Boat Conformation ◽  
Orthorhombic Crystal System ◽  
Orthorhombic Crystal ◽  
Space Group ◽  
Cell Parameters ◽  
Crystal System ◽  
Hirshfeld Surfaces ◽  
Short Contacts

The compounds, 5-methyl-5H-dibenzo[b,f]azepine (1) and 5-(4-methylbenzyl)-5H-dibenzo[b,f]azepine (2), were synthesized and characterized by spectral studies, and finally confirmed by single crystal X-ray diffraction method. The compound 1 crystallizes in the orthorhombic crystal system in Pca21 space group, having cell parameters a=11.5681 (18) Å, b=11.8958 (18) Å, c=8.0342 (13) Å, and Z=4 and V=1105.6 (3) Å3. And the compound 2 crystallizes in the orthorhombic crystal system and space group Pbca, with cell parameters a=16.5858 (5) Å, b=8.4947 (2) Å, c=23.1733 (7) Å, and Z=8 and V=3264.92 (16) Å3. The azepine ring of both molecules 1 and 2 adopts boat conformation with nitrogen atom showing maximum deviations of 0.483 (2) Å and 0.5025 (10) Å, respectively. The C–H⋯π short contacts were observed. The dihedral angle between fused benzene rings to the azepine motif is 47.1 (2)° for compound 1 and 52.59 (6)° for compound 2, respectively. The short contacts were analyzed and Hirshfeld surfaces computational method for both molecules revealed that the major contribution is from C⋯H and H⋯H intercontacts.

Synthesis and Characterization of La2Ca2Cu2O7 Compound

1998 ◽  
Vol 12 (23) ◽  
pp. 991-993
Author(s):  
L. K. Kaliyaperumal ◽  
J. Srinivas ◽  
K. Jeyabalan
Keyword(s):  
Diffraction Analysis ◽  
Ambient Pressure ◽  
Lattice Parameters ◽  
Synthesis And Characterization ◽  
Orthorhombic Crystal System ◽  
X Ray Diffraction ◽  
Orthorhombic Crystal ◽  
X Ray ◽  
Crystal System

Synthesis and characterization of La 2 Ca 2 Cu 2 O 7 compound at ambient pressure is reported here. The powder X-ray diffraction analysis shows that the compound crystallizes in an orthorhombic crystal system with lattice parameters a = 5.770(4) Å, b = 5.887(7) Å and c = 27.37(2) Å.

X-ray powder diffraction data for κ-Al2O3

1999 ◽  
Vol 14 (1) ◽  
pp. 61-63 ◽  
Author(s):  
M. Halvarsson ◽  
V. Langer ◽  
S. Vuorinen
Keyword(s):  
Powder Diffraction ◽  
Diffraction Data ◽  
Unit Cell ◽  
Theoretical Density ◽  
Powder Diffraction Data ◽  
Orthorhombic Crystal System ◽  
Orthorhombic Crystal ◽  
X Ray ◽  
Crystal System ◽  
Chemical Formulas

X-ray powder diffraction data for κ-Al2O3 are reported. It was concluded that κ-Al2O3 belongs to the orthorhombic crystal system with space group Pna21. The lattice parameters were found to be a=4.8351(3) Å, b=8.3109(5) Å, c=8.9363(3) Å. There are 16 Al3+ and 24 O2− in the unit cell, and thus the number of chemical formulas in the unit cell, Z, is 8. The volume V of the unit cell is equal to 359.09(6) Å3 and the theoretical density Dx is 3.772 g/cm3. The Smith–Snyder (F20) and the de Wolff (M20) values for these data are 136.1 (0.0059, 25) and 98.4, respectively.

Synthesis, optical and electronic properties of one-dimensional sulfoxonium-based hybrid metal halide, (CH3)3SOPbI3

2021 ◽  
Author(s):  
Yuki Tanaka ◽  
Shiqiang Bai ◽  
Xi Zu Wang ◽  
Si Yin TEE ◽  
Siew Lay Lim ◽  
...  
Keyword(s):  
Electronic Properties ◽  
Metal Halide ◽  
Orthorhombic Crystal System ◽  
Orthorhombic Crystal ◽  
Space Group ◽  
One Dimensional ◽  
Crystal System ◽  
Optical And Electronic Properties ◽  
Pnma Space Group

We report the synthesis, optical and electronic properties of one-dimensional sulfoxonium-based hybrid metal halide in an orthorhombic crystal system with a Pnma space group. To provide direct insights, a method...

scholarly journals Zur Kenntnis von KCrF4/On KCrF4

1987 ◽  
Vol 42 (2) ◽  
pp. 135-141 ◽  
Author(s):  
Dieter Kissel ◽  
Rudolf Hoppe
Keyword(s):  
Single Crystals ◽  
Orthorhombic Crystal System ◽  
Orthorhombic Crystal ◽  
Ionic Radii ◽  
Coordination Numbers ◽  
Crystal System ◽  
Yellowish Green

Abstract KCrF4 has been prepared as yellowish-green single crystals (by heating of KF, CuF2 , CrF3 ; Au-tube, 750 °C, 60d). It crystallizes in the orthorhombic crystal system (Pnma) with: a = 1573.2, b = 743.2, c = 1833.1 pm, Z = 24. The structure shows [Cr3F9F6/2]3--columns along [010], The Madelung Part of Lattice Energie, MAPLE, is calculated and discussed, along with Effective Coordination Numbers, ECoN (via Mean Fictive Ionic Radii, MEFIR). The structure is described using SCHLEGEL-diagrams.

scholarly journals Perbandingan Sifat Feroelektrik Pada Sintesis Oksida Logam Aurivillius SrBi4Ti4O15 Empat Lapis Dengan Metode Hidrotermal

2019 ◽  
Vol 6 (2) ◽  
pp. 67-73
Author(s):  
Karnelasatri Karnelasatri ◽  
Edi Mikrianto
Keyword(s):  
Hydrothermal Method ◽  
Remanent Polarization ◽  
Single Phase ◽  
Ferroelectric Properties ◽  
Orthorhombic Crystal System ◽  
Orthorhombic Crystal ◽  
Space Group ◽  
Cell Parameters ◽  
Crystal System ◽  
System Cell

Aurivillius compounds, SrBi4Ti4O15 (SBT four layers) have been synthesized by hydrothermal method at 200℃ with variation of times 48 hours, 72 hours and 96 hours. Single phase of SrBi4Ti4O15 Aurivillius compounds obtained at the 200 ˚ C, 96 hours and the concentration of NaOH 3M. The Rietica program shown the index Miller result is 1 1 5 1 1 3, 0 2 0, 0 2 4, 2 0 8 2 2 0, 0 2 1 0, 3 1 6, 1 1 1 6 and the space group is A21am with the orthorhombic crystal system. Cell parameters are a = 5.5754 Å, b = 5.5456 Å, c = 41.3642. Ferroelectric properties show the value of remanent polarization Pr (+) and Pr (-) 4,61 C/cm2 and 2,75 C/cm2 and that is much lower than the value of remanent polarization of other material that have been synthesized at 240℃, 72 hours with the same method.

Synthesis and Characterization of La2CaCu3O7 Compound

1998 ◽  
Vol 12 (04) ◽  
pp. 143-146
Author(s):  
K. Jeyabalan ◽  
L. K. Kaliyaperumal ◽  
A. Sekar ◽  
S. Arumugam ◽  
J. Srinivas
Keyword(s):  
Diffraction Analysis ◽  
Powder Diffraction ◽  
Synthesis And Characterization ◽  
Orthorhombic Crystal System ◽  
Orthorhombic Crystal ◽  
X Ray ◽  
Crystal System ◽  
Cell Dimensions ◽  
Unit Cell Dimensions

Synthesis and characterization of the compound La 2 CaCu 3 O 7 has been reported here. The X-ray powder diffraction analysis reveals that the compound crystallizes in an orthorhombic crystal system with unit cell dimensions of a=5.496(6) Å, b=5.685(5) Å and c=24.356(11) Å.

The Investigation of Microstructure of Pt/Ti Explosive Clad Interface

2005 ◽  
Vol 475-479 ◽  
pp. 3855-3858 ◽  
Author(s):  
Shi Zhong Wei ◽  
Yan Li ◽  
Jin Hua Zhu
Keyword(s):  
Electron Microscope ◽  
Crystal Size ◽  
Energy Dispersive Spectrometer ◽  
Martensite Phase ◽  
Crystal Layer ◽  
Orthorhombic Crystal System ◽  
Orthorhombic Crystal ◽  
X Ray ◽  
Transmission Electron ◽  
Scanning Electron

Microstructure in anchoring site of Pt/Ti explosive clad Plate was observed, tested and analyzed by analytical and high resolution transmission electron microscope, X-ray diffractometer, scanning electron microscope and energy-dispersive spectrometer. An intermittent micro-crystal layer was observed in anchoring area, with thickness of 2 um. The inner crystal size was from some nanometer. to hundreds of nanometer. Some crystal had defects in it, such as staggered layer. The layer was composed of metal compound, like PtTi，Pt5Ti3，Pt3Ti，Ti3Pt and etc. The direct Pt—Ti anchoring area, hexagonal Ti variation-orthorhombic crystal system, α″-Ti metastable martensite phase and bicrystals with partial deformation were also observed. The research of microstructure in anchoring area revealed the nature of explosive compound in metallurgical anchoring.

scholarly journals Synthesis, Crystal Structures, Thermal and Antimicrobial Properties of Mn(II) Complexes of 1,10-Phenanthroline With Some Co-Ligands

2018 ◽  
Vol 10 (4) ◽  
pp. 155
Author(s):  
Donatus Bekindaka Eni ◽  
Divine Mbom Yufanyi ◽  
Che Dieudonne Tabong ◽  
Rajamony Jagan ◽  
Moise Ondoh Agwaraa
Keyword(s):  
Magnetic Moments ◽  
Antimicrobial Properties ◽  
Diffusion Method ◽  
Orthorhombic Crystal ◽  
Monoclinic Crystal ◽  
Space Group ◽  
Crystal System ◽  
Antibacterial And Antifungal Activities ◽  
Antibacterial And Antifungal

The complexes of Manganese(II) with 1,10-phenanthroline using the nitrate, thiocyanate and dicyanamide as co-ligands have been synthesized and characterized by elemental analysis, infrared spectroscopy, thermal analysis and room temperature magnetic susceptibility measurements. The magnetic moments of the complexes are consistent with high spin (d5) octahedral geometry. Single-crystal X-ray analysis confirmed the complexes to be [Mn(Phen)2(NO3)2] (1), [Mn(Phen)2(N3)2)] (2), and [Mn(Phen)2(dca)2)] (3). Complexes 1 and 2 crystallize in an orthorhombic crystal system with space group Pbcn while complex 3 crystallizes in the monoclinic crystal system with space group P21/c. The complexes have been screened for in vitro antibacterial and antifungal activities by the disc diffusion method. The minimum inhibitory concentration values indicate that the complexes showed greater activity against the fungi strains tested compared to that of the reference antifungal.

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