Crystal structure of a new compound Li2Mg2(WO4)3

1994 ◽  
Vol 9 (3) ◽  
pp. 158-160 ◽  
Author(s):  
Zhengmin Fu ◽  
Wenxiu Li
Keyword(s):  
Crystal Structure ◽  
Powder Diffraction ◽  
Unit Cell ◽  
Lattice Parameters ◽  
Orthorhombic System ◽  
Space Group ◽  
X Ray ◽  
Measured Density

The crystal structure of a new compound Li2Mg2(WO4)3 has been determined by means of X-ray powder diffraction. Li2Mg2(WO4)3 belongs to the orthorhombic system, with space group Pnma and the lattice parameters are: a = 5.1129 Å, b = 10.462 A, and c = 17.612 Å at room.temperature. Its measured density is Dm = 5.48 g/cm3, and each unit cell contains four formula weights.

Kristall- und Molekülstruktur von 5.10-Dihydro-5.10-diniethylphenaziniiimtniodid und 5.10-Dihydro-5.10-diethylphenaziniumtriiodid / Molecular and Crystal Structure of 5,10-Dihydro-5.10-dimethylphenaziniumtriiodide and 5.10-Dihydro-5.10-diethylphenazinium triiodide

1978 ◽  
Vol 33 (8) ◽  
pp. 838-842 ◽  
Author(s):  
H. J. Keller ◽  
W. Moroni ◽  
D. Nöthe ◽  
M. Scherz ◽  
J. Weiss
Keyword(s):  
Crystal Structure ◽  
Radical Cations ◽  
Unit Cell ◽  
Lattice Parameters ◽  
Molecular And Crystal Structure ◽  
Reaction Conditions ◽  
Space Group ◽  
X Ray ◽  
R Value

Oxidation of 5,10-dihydro-5,10-dimethylphenazine and 5,10-dihydro-5,10-diethyl-phenazine under different reaction conditions leads to several iodine containing solids. The preparation and X-ray structure of two of them, 5,10-dihydro-5,10-dimethyl-phcnaziniumtriiodide (3) and 5,10-dihydro-5,10-diethylphenaziniumtriiodido (4) are reported here.Compound 3 crystallizes in space group P21/n with lattice parameters a = 8.552(6) Å, b= 16.953(2) Å, c- 12.157(9) Å and β= 103.46(2)° with four formula units in the unit cell. The structure was refined to an R-value of 0.046 using 2387 independent reflections. The lattice constains distinct, slightly distorted triiodide ions and bent 5,10-dihydro-5,10-dimethylphenazinium radical cations. Compound 4 crystallizes in the same space group P21/n with lattice parameters a = 8.531(6) Å, b = 8.332(21) Å, c = 13.320(15) Å and β= 94.44(19)° with two formula units in the unit cell. The structure was refined to an R-value of 0.076 using 1195 independent reflections. The lattice contains strictly linear symmetrical triiodide ions and planar centrosymmetrical 5,10-dihydro-5,10-diethyl- phenazinium radical cations.

The crystal structure of trisodium hexachlororhodate (Na3RhCl6)

2018 ◽  
Vol 33 (1) ◽  
pp. 62-65
Author(s):  
Martin Etter
Keyword(s):  
Crystal Structure ◽  
Powder Diffraction ◽  
Structure Type ◽  
Unit Cell ◽  
Unit Cell Parameters ◽  
Space Group ◽  
X Ray ◽  
Cell Parameters

Commercially available trisodium hexachlororhodate (Na3RhCl6) was dehydrated and characterized by laboratory X-ray powder diffraction. The crystal structure is isostructural to the Na3CrCl6 structure type with space group P$\bar 31$c. Unit-cell parameters are a = 6.8116(1) Å, c = 11.9196(2) Å, V = 478.95(2) Å3, and Z = 2.

Disordered crystal structure of pentamethylcyclopentadienylsodium as seen by high-resolution X-ray powder diffraction

2001 ◽  
Vol 57 (5) ◽  
pp. 673-679 ◽  
Author(s):  
Consiglia Tedesco ◽  
Robert E. Dinnebier ◽  
Falk Olbrich ◽  
Sander van Smaalen
Keyword(s):  
Crystal Structure ◽  
High Resolution ◽  
Rietveld Refinement ◽  
Powder Diffraction ◽  
Lattice Parameters ◽  
Space Group ◽  
X Ray ◽  
Disordered Crystal

The crystal structure of pentamethylcyclopentadienylsodium, [NaC10H15] (NaCp*), has been determined from high-resolution X-ray powder diffraction. The compound crystallizes in space group Cmcm with lattice parameters a = 4.61030 (3), b = 16.4621 (3), c = 14.6751 (2) Å, V = 1113.77 (4) Å3 (Z = 4). NaCp* forms polymeric multidecker chains along the a axis. The Rietveld refinement (Rp = 0.050 and RF = 0.163) shows that the Cp* moieties occupy, with disorder, two different orientations rotated away from the eclipsed conformation by ±13.8°.

Crystal Structure of the New Compound NdFeSb3

2007 ◽  
Vol 353-358 ◽  
pp. 3043-3046 ◽  
Author(s):  
Ping Li Qin ◽  
Liang Qin Nong ◽  
Ji Liang Zhang ◽  
Hai Qing Qin ◽  
Jiang Ping Liao ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Powder Diffraction ◽  
Rietveld Method ◽  
Structure Type ◽  
Lattice Parameters ◽  
Orthorhombic Space Group ◽  
Space Group ◽  
X Ray

The crystal structure of a new compound NdFeSb3 has been determined by X-ray powder diffraction using the Rietveld method. The compound crystallizes in the orthorhombic, space group Pbcm (No.57) with the CeNiSb3 structure type and lattice parameters a=1.26828(2)nm, b=0.61666(2)nm, c=1.81867(4) nm, z=12 and Dcalc=7.917g/cm3.

scholarly journals On the Crystal Structure of HgZn3

1982 ◽  
Vol 37 (5) ◽  
pp. 557-559 ◽  
Author(s):  
M. Pušelj ◽  
Z. Ban ◽  
A. Drašner
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Powder Diffraction ◽  
Intermetallic Phase ◽  
Statistical Distribution ◽  
Orthorhombic System ◽  
Space Group ◽  
X Ray ◽  
Atomic Species ◽  
Probable Space

The crystal structure of the intermetallic phase HgZn3 was determined using X-ray single crystal and powder diffraction methods. The phase belongs to the orthorhombic system, most probable space group being Cmc21, and appears to be isostructural with β'-Cu3Ti. Under standard preparative conditions a statistical distribution of both atomic species was observed

X-Ray Powder Diffraction Data for the Al7Cu5Y Ternary Compound

2014 ◽  
Vol 950 ◽  
pp. 53-56
Author(s):  
Bin He ◽  
Ming Qin ◽  
Liu Qing Liang ◽  
Zhao Lu ◽  
De Gui Li ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Ternary Compound ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Structure Type ◽  
The Body ◽  
Lattice Parameters ◽  
Powder Diffraction Data ◽  
Space Group ◽  
X Ray

Crystal structure and X-ray powder diffraction data for the Al7Cu5Y ternary compound are presented. The compound crystallizes in the body-centered tetragonal with the Al7Fe5Y structure type (space group I4/mmm), the lattice parameters a = 8.6960(9) Å, c = 5.1256(7) Å, V =387.62 Å3, Z =2, ڑx =5.102 g/cm3, F30 = 275.5(0.0033, 33) and RIR =1.23.

Rietveld refinement of the crystal structure of γ-Mo4O11

1999 ◽  
Vol 14 (4) ◽  
pp. 284-288 ◽  
Author(s):  
Hoong-Kun Fun ◽  
Ping Yang ◽  
Minoru Sasaki ◽  
Masasi Inoue ◽  
Hideoki Kadomatsu
Keyword(s):  
Crystal Structure ◽  
Rietveld Refinement ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Room Temperature ◽  
Rietveld Analysis ◽  
Powder Diffraction Data ◽  
Orthorhombic System ◽  
Space Group ◽  
X Ray

The crystal structure of γ-Mo4O11 was obtained at room temperature (296 K) by Rietveld analysis with X-ray powder diffraction data. The crystal belongs to orthorhombic system, space group: Pna21, Z=4, Mr=559.753 (Atomic weights 1977), Dx=4.1228 g/cm3, F(000)=1024.0, μ=451.293 cm−1 (Int. Tab. Vol. C, Table 4.2.4.2, p. 193, λ=1.540 60 Å), a=24.4756(5) Å, b=6.7516(1) Å, c=5.4572(1) Å, and V=901.80(3) Å3. The structure was refined to Rwp=5.60%, Rp=4.27%, Rb=3.36%, and Rf=2.74% for 65 parameters with 3541 step intensities and 3055 peaks. Goodness of the fit S=3.35.

scholarly journals X-ray powder diffraction analysis of a silver(I)-aspartame complex

2006 ◽  
Vol 21 (4) ◽  
pp. 314-317
Author(s):  
R. Putvinskis ◽  
C. O. Paiva-Santos ◽  
M. Cavicchioli ◽  
A. C. Massabni
Keyword(s):  
Methyl Ester ◽  
Diffraction Analysis ◽  
Powder Diffraction ◽  
Unit Cell ◽  
Lattice Parameters ◽  
Stoichiometric Mixture ◽  
Orthorhombic Unit Cell ◽  
Space Group ◽  
X Ray ◽  
Succinamic Acid

Synchrotron X-ray powder diffraction (XRPD) data were collected for the silver(I)-aspartame complex [Ag(C14H17N2O5)]∙1∕2H2O. The complex was obtained from a stoichiometric mixture of aspartame (3-amino-N-(α-carboxyphenethyl)-succinamic acid N-methyl ester, C14H18N2O5), Na2CO3, and AgNO3. Indexing using Crysfire and Chekcell proposed an orthorhombic unit cell with space group P2221. The lattice parameters are a=12.4750(1) Å, b=21.60614(14) Å, and c=4.88888(9) Å.

X-ray powder diffraction study of DMAN complexes with phthalic acids

2005 ◽  
Vol 20 (1) ◽  
pp. 62-66
Author(s):  
A. Rafalska-Lasocha ◽  
K. Surówka ◽  
W. Lasocha
Keyword(s):  
Diffraction Study ◽  
Powder Diffraction ◽  
Terephthalic Acid ◽  
Phthalic Acid ◽  
Lattice Parameters ◽  
Monoclinic System ◽  
Orthorhombic System ◽  
Space Group ◽  
X Ray ◽  
Phthalic Acids

Complexes of 1,8-bis(dimethylamino)naphthalene, known also as DMAN, with phthalic acid, terephthalic acid, and 5-aminoisophthalic acid were synthesized and investigated by means of powder diffraction methods. DMAN and phthalic acid complexes crystallize in the orthorhombic system, space group Pnmm (59) with the lattice parameters a=1.17423(3) nm, b=1.7124(4) nm, c=0.9933(4) nm, V=1.997 24 nm3, whereas DMAN complexes with terephthalic acid or 5-aminoisophthalic acid crystallize in the monoclinic system in the space group P2 or P2∕m with the lattice parameters a=2.4337(5) nm, b=0.9665(2) nm, c=1.1800(3) nm, β=91.53(2)°, V=2.774 51 nm3 and a=2.1609(7) nm, b=1.1017(6) nm, c=1.8921(7) nm, β=112.095(34)°, V=4.173 46 nm3, respectively.

Die Hydrate von tert-Butanol: Kristallstruktur von Me3COH · 2H2O und Me3COH · 7H2O [1] / The Hydrates of tert-Butanol: Crystal Structure of Me3COH · 2 H2O and Me3COH · 7H2O

1993 ◽  
Vol 48 (10) ◽  
pp. 1325-1330 ◽  
Author(s):  
Dietrich Mootz ◽  
Dieter Stäben
Keyword(s):  
Crystal Structure ◽  
Structure Analysis ◽  
Powder Diffraction ◽  
Three Dimensional ◽  
Unit Cell ◽  
Space Group ◽  
X Ray ◽  
Tert Butanol ◽  
Characteristic Layers ◽  
Hydrogen Bonded

The system tert-butanol-water has been confirmed by X-ray powder diffraction and singlecrystal structure analysis to contain two hydrates, a dihydrate and a higher hydrate. The composition of the latter, contradictory in the literature, could be resolved in favor of the new one of a heptahydrate. The dihydrate (m.p. 0.7°C) is monoclinic with space group P21 and Z = 2 formula units per unit cell of dimensions a = 6.017, b = 6.055, c = 10.377 Å and β = 106.60° at -150°C. The heptahydrate (m.p. -6°C, dec.) is orthorhombic with space group Pnma, Z = 4, a = 12.589, b = 15.251 and c = 6.645 Å at -150°C. Both hydrates contain characteristic layers of hydrogen-bonded O atoms, which in the heptahydrate are further linked into a three-dimensional semi-clathrate structure

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