ChemInform Abstract: Crystal Structure and Chemical Properties of U2Al3C4 and Structure Refinement of Al4C3.

ChemInform ◽  
2010 ◽  
Vol 26 (26) ◽  
pp. no-no
Author(s):  
T. M. GESING ◽  
W. JEITSCHKO
Keyword(s):  
Crystal Structure ◽  
Structure Refinement ◽  
Chemical Properties ◽  
And Chemical Properties

New-dimensional cyclam. Synthesis, crystal structure, and chemical properties of macrocyclic tetraamines bearing a phenol pendant

1987 ◽  
Vol 26 (18) ◽  
pp. 2975-2983 ◽  
Author(s):  
Eiichi Kimura ◽  
Tohru Koike ◽  
Keiji Uenishi ◽  
Markus Hediger ◽  
Miyuki Kuramoto ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Chemical Properties ◽  
And Chemical Properties

Molecular crystal structure and chemical properties of 4-phenyl-3,5-diethoxycarbonyl-1,2,6-trimethyl-1,2-dihydropyridine

1991 ◽  
Vol 27 (9) ◽  
pp. 995-998 ◽  
Author(s):  
M. F. Bundule ◽  
A. F. Mishnev ◽  
V. K. Lusis ◽  
D. Kh. Mutsenietse ◽  
A. Z. Zandersons ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Molecular Crystal ◽  
Chemical Properties ◽  
And Chemical Properties

scholarly journals Crystal structure and chemical constitution of basic beryllium acetate and its homologues

1926 ◽  
Vol 112 (761) ◽  
pp. 441-448 ◽  
Keyword(s):  
Crystal Structure ◽  
Organic Compound ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
X Ray ◽  
Chemical Constitution ◽  
Physical And Chemical ◽  
And Chemical Properties

The physical and chemical properties of basic beryllium acetate, OBe 4 (CH 3 .CO 2 ) 6 , are those of a non-ionised substance having the unitary structure of a typical organic compound, each chemical molecule of which may be regarded as forming one co-ordination complex. The fact that the arrangement of the eleven associating units of which this molecule is composed possesses the geometrical attributes of a tetrahedron has led to a stereochemical conception of the constitution of the compound, which is confirmed by the results of X-ray analysis.

scholarly journals The Crystal Structure and Chemical Properties of U2Al3C4 and Structure Refinement of Al4C3

1995 ◽  
Vol 50 (2) ◽  
pp. 196-200 ◽  
Author(s):  
Thorsten M. Gesing ◽  
Wolfgang Jeitschko
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Structure Refinement ◽  
Chemical Properties ◽  
Variable Parameters ◽  
Higher Symmetry ◽  
Structure Factors ◽  
Hydrolysis Of ◽  
Symmetry Space ◽  
Symmetry Space Group

A well crystallized sample of U2Al3C4 was obtained by melting the elemental components in a carbon crucible in a high frequency furnace. The crystal structure of this compound was determined from single-crystal diffractometer data of a twinned crystal: P63mc, a = 342.2(1) pm. c = 2323.0(3) pm. Z = 2 , R = 0.030 for 537 structure factors and 18 variable parameters. The structure can also be described in the higher symmetry space group P63/mmc with one split aluminum position. It consists of close packed layers of uranium and aluminum atoms with carbon atoms at interstitial sites. The structure is closely related to that of Al4C3, which was refined from single-crystal X-ray data to a residual of R = 0.033 for 135 F-values and 11 variables. The hydrolysis of U2Al3C4 with diluted hydrochloric acid resulted in about 74 (wt-)% methane, 8% ethane and ethylene, and 18% saturated and unsaturated higher hydrocarbons.

Zur Kristallchemie von Graphen und Graphit

2009 ◽  
Vol 66 (1) ◽  
pp. 81-83
Author(s):  
M. Trömel
Keyword(s):  
Crystal Structure ◽  
Chemical Properties ◽  
Single Layer ◽  
Single Layer Graphene ◽  
Chemical Bonds ◽  
Graphene Layers ◽  
Layer Graphene ◽  
Closest Packing ◽  
Weak Chemical ◽  
And Chemical Properties

The crystal structure of single-layer graphene in comparison to graphite is discussed with regard to its crystallographic and chemical properties. In both of these polymorphs of carbon, the atomic volume of carbon, reduced to the closest packing of atoms, is practically the same and considerably smaller than in diamond. This indicates pentavalent carbon in graphene as well as in graphite. The observed elastic corrugations of the graphene layers which probably cause their amazing rigidity seem to be due to numerous weak chemical bonds within the layers.

Crystal Chemistry of Hydrogen Storage Materials

2008 ◽  
Vol 1098 ◽  
Author(s):  
Martin Owen Jones ◽  
William I. F. David ◽  
Simon R. Johnson ◽  
Marco Sommariva ◽  
Rebecca L. Lowton ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Alkali Metal ◽  
Hydrogen Storage ◽  
Crystal Chemistry ◽  
Hydrogen Absorption ◽  
Chemical Properties ◽  
Hydrogen Storage Materials ◽  
Storage Materials ◽  
Metal Amides ◽  
And Chemical Properties

AbstractWe review here work on two classes of compounds that have been promoted as potential hydrogen storage materials; alkali metal amides and borohydrides, highlighting how their crystal structure and chemical properties may be used to influence the key hydrogen absorption and desorption parameters in these materials.

Über Erdalkalimetall-Oxocuprate. VI.

1972 ◽  
Vol 27 (3) ◽  
pp. 296-301 ◽  
Author(s):  
Chr. L. Teske ◽  
Hk. Müller-Buschbaum
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Structure Determination ◽  
Chemical Properties ◽  
Crystal Structure Determination ◽  
Structural Element ◽  
X Ray ◽  
And Chemical Properties ◽  
The Way

The preparation and chemical properties of barium-oxocuprat (I) inclusive the results of the crystal structure determination by single crystal X-ray investigations are described. BaCu2O2 crystallizes isotypically with SrCu2O2 . (a = 5.72 and c = 10.06 Å. Spacegroup : D194h - 141/amd.) The influence of the bigger Ba2⨁-ion on the oxigenconfiguration surrounding the cations is discussed. It seems that the stretched O - Cu - O-dumbell is an invariable structural element in the oxocompounds of copper (I), which is shown by comparison of already known oxocuprates (I) . Only the way of interchainment varies evidently with stoichiometry.

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