The evolution of granitic and rhyolitic melts documented
... HC3-LM (Neuser et al. 1995). The electron gun operates at a voltage of 14 kV under high vacuum (10-5 mbar) and a filament current of 0.18 mA resulting in a current density of ca. 10 mA/mm2 at the sample surface. Photographic documentation was carried out with a NIKON Microflex UFX-II system equipped ...
... HC3-LM (Neuser et al. 1995). The electron gun operates at a voltage of 14 kV under high vacuum (10-5 mbar) and a filament current of 0.18 mA resulting in a current density of ca. 10 mA/mm2 at the sample surface. Photographic documentation was carried out with a NIKON Microflex UFX-II system equipped ...
Chemical bath deposition and electrodeposition of
... ZnO in the hexagonal Brillouin zone calculated with dominant atomic self-interaction-corrected pseudopotentials (SIC-PP).31 .................................6 Figure 1.3. Photoluminescence spectrum of n-type bulk ZnO with He-Cd excitation of 325 nm at 4.2 K, showing bound exciton recombination, dono ...
... ZnO in the hexagonal Brillouin zone calculated with dominant atomic self-interaction-corrected pseudopotentials (SIC-PP).31 .................................6 Figure 1.3. Photoluminescence spectrum of n-type bulk ZnO with He-Cd excitation of 325 nm at 4.2 K, showing bound exciton recombination, dono ...
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... distances, and thus, the energy landscape by influencing the nature of the intermolecular interactions, the chemical bonding, the molecular configurations, the crystal structures and the stability of materials. New classes of materials having unusual stoichiometries and crystal structures, which hav ...
... distances, and thus, the energy landscape by influencing the nature of the intermolecular interactions, the chemical bonding, the molecular configurations, the crystal structures and the stability of materials. New classes of materials having unusual stoichiometries and crystal structures, which hav ...
Copyright 2010 Scott R
... Na(H3BNMe2BH3), in tetrahydrofuran produces the new complex Th(H3BNMe2BH3)4. The thorium center forms bonds with fifteen hydrogen atoms; accordingly, this is the first example of a fifteen-coordinate atom of any kind. As determined by both single crystal X-ray and single crystal neutron diffraction ...
... Na(H3BNMe2BH3), in tetrahydrofuran produces the new complex Th(H3BNMe2BH3)4. The thorium center forms bonds with fifteen hydrogen atoms; accordingly, this is the first example of a fifteen-coordinate atom of any kind. As determined by both single crystal X-ray and single crystal neutron diffraction ...
Chapter 10: Liquids and Solids
... 46. A metal crystallizes with a face-centered cubic lattice. The edge of the unit cell is 395 pm. The diameter of the metal atom is: A) 140 pm B) 198 pm C) 279 pm D) 395 pm E) none of these ANS: C PTS: 1 DIF: Moderate REF: 10.4 KEY: Chemistry | general chemistry | phases | solid | calculations with ...
... 46. A metal crystallizes with a face-centered cubic lattice. The edge of the unit cell is 395 pm. The diameter of the metal atom is: A) 140 pm B) 198 pm C) 279 pm D) 395 pm E) none of these ANS: C PTS: 1 DIF: Moderate REF: 10.4 KEY: Chemistry | general chemistry | phases | solid | calculations with ...
systematics and crystal genesis of carbonate minerals
... rhombohedral habits. The sequence in both sites is referred to continuous drop of the temperature or successive change in the pH of the solutions and selective adsorption of foreign ions on faces are accepted as an accidental habit-modifying factor. ...
... rhombohedral habits. The sequence in both sites is referred to continuous drop of the temperature or successive change in the pH of the solutions and selective adsorption of foreign ions on faces are accepted as an accidental habit-modifying factor. ...
Star-Shaped Conjugated Systems
... The situation seems to be different for the amine cores C-3. However, the pyramidal structure of triarylamines differs only very slightly from the totally planar conformation, which represents the transition state of the N-inversion. Triphenylamine as model compound has in the crystalline state a ve ...
... The situation seems to be different for the amine cores C-3. However, the pyramidal structure of triarylamines differs only very slightly from the totally planar conformation, which represents the transition state of the N-inversion. Triphenylamine as model compound has in the crystalline state a ve ...
Thermal diffusivity of upper mantle rocks: Influence of temperature
... olivine CPO pattern is characteristic of a flattening deformation (axial shortening or transpression, [Tommasi et al., 1999]). The dunites, 00VS24 and 00VS11, show an olivine CPO with an orthorhombic symmetry, characterized by equivalent concentrations (maximum density ffi 5 multiples of uniform distr ...
... olivine CPO pattern is characteristic of a flattening deformation (axial shortening or transpression, [Tommasi et al., 1999]). The dunites, 00VS24 and 00VS11, show an olivine CPO with an orthorhombic symmetry, characterized by equivalent concentrations (maximum density ffi 5 multiples of uniform distr ...
Non-protein amino acids in peptide design
... readily apparent correlation between the Aib content and positioning in the sequence, in the case of peptides having fewer than 50% Aib residues. In several crystal structures, multiple helical molecules have been observed in the crystallographic asymmetric unit, which adopt different hydrogen bondi ...
... readily apparent correlation between the Aib content and positioning in the sequence, in the case of peptides having fewer than 50% Aib residues. In several crystal structures, multiple helical molecules have been observed in the crystallographic asymmetric unit, which adopt different hydrogen bondi ...
Amorphous lactose
... drum drying technique at temperatures above 93.5°C. Several other crystalline forms of lactose are described and characterized, such as anhydrous α-lactose or a α-β ‘mixed crystal’. Amorphous lactose is a well described, but less characterized form of lactose. It has no crystal structure and it is a ...
... drum drying technique at temperatures above 93.5°C. Several other crystalline forms of lactose are described and characterized, such as anhydrous α-lactose or a α-β ‘mixed crystal’. Amorphous lactose is a well described, but less characterized form of lactose. It has no crystal structure and it is a ...
- University of Bath Opus
... The simplest possible photonic crystal, shown in Fig.1.1, is the one dimensional (1-D) structure. This consists of alternating layers of two types of material with different dielectric constants with each pair of layers being identical to the previous or next pair. The traditional approach to develo ...
... The simplest possible photonic crystal, shown in Fig.1.1, is the one dimensional (1-D) structure. This consists of alternating layers of two types of material with different dielectric constants with each pair of layers being identical to the previous or next pair. The traditional approach to develo ...
Investigations Concerning the Laser Ignition of Energetic
... Energetic materials (EMs) not only found use in military applications but also in civil ones like airbags, explosives in mining, signal ammunition or fireworks, just to name a few. However, it was a long way from the incidental discovery of black powder (a mixture of 75 % potassium nitrate, 15 % cha ...
... Energetic materials (EMs) not only found use in military applications but also in civil ones like airbags, explosives in mining, signal ammunition or fireworks, just to name a few. However, it was a long way from the incidental discovery of black powder (a mixture of 75 % potassium nitrate, 15 % cha ...
Crystal structure of the simian immunodeficiency virus (SIV) gp41
... The crystal structure of the HIV-1 gp41 ectodomain core in its proposed fusion-active state is a six-helix bundle. Here we have reconstituted the core of the SIV gp41 ectodomain with two synthetic peptides called SIV N36 and SIV C34, which form a highly helical trimer of heterodimers. The 2.2 Å reso ...
... The crystal structure of the HIV-1 gp41 ectodomain core in its proposed fusion-active state is a six-helix bundle. Here we have reconstituted the core of the SIV gp41 ectodomain with two synthetic peptides called SIV N36 and SIV C34, which form a highly helical trimer of heterodimers. The 2.2 Å reso ...
Intermetallic Magnesium Compounds RE2 Ni Mg (RE = Gd, Dy–Tm
... Most structural studies have been performed for the nickel-containing materials. Besides the more complicated structures of La43 Ni17 Mg5 [12], RE4 NiMg [13 – 16], and RE23 Ni7 Mg4 [16, 17], a variety of compounds with supposedly complex structures can be easily described as simple intergrowth varia ...
... Most structural studies have been performed for the nickel-containing materials. Besides the more complicated structures of La43 Ni17 Mg5 [12], RE4 NiMg [13 – 16], and RE23 Ni7 Mg4 [16, 17], a variety of compounds with supposedly complex structures can be easily described as simple intergrowth varia ...
Interdiffusion in the systems (Nickel(X)-Oxide) - (Cobalt(X)
... image. You will find a good image of the page in the adjacent frame. 3. When a map, drawing or chart, etc., was part of the material being photographed the photographer followed a definite method in "sectioning" the material. It is customary to begin photoing at the upper left hand corner of a large ...
... image. You will find a good image of the page in the adjacent frame. 3. When a map, drawing or chart, etc., was part of the material being photographed the photographer followed a definite method in "sectioning" the material. It is customary to begin photoing at the upper left hand corner of a large ...
Ab initio modelling of mechanical and elastic properties of solids
... The aim of the thesis is to study mechanical properties of crystalline materials on the basis of density functional theory (DFT) by applying first-principles or ab initio techniques. Mechanical properties of materials are of crucial importance for technological applications. How a material breaks, i ...
... The aim of the thesis is to study mechanical properties of crystalline materials on the basis of density functional theory (DFT) by applying first-principles or ab initio techniques. Mechanical properties of materials are of crucial importance for technological applications. How a material breaks, i ...
Crystal structure
In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms, ions or molecules in a crystalline liquid or solid. It describes a highly ordered structure, occurring due to the intrinsic nature of its constituents to form symmetric patterns.The crystal lattice can be thought of as an array of 'small boxes' infinitely repeating in all three spatial directions. Such a unit cell is the smallest unit of volume that contains all of the structural and symmetry information to build-up the macroscopic structure of the lattice by translation.Patterns are located upon the points of a lattice, which is an array of points repeating periodically in three dimensions. The lengths of the edges of a unit cell and the angles between them are called the lattice parameters. The symmetry properties of the crystal are embodied in its space group.A crystal's structure and symmetry play a role in determining many of its physical properties, such as cleavage, electronic band structure, and optical transparency.