THE ATTENUATION OF THE PERIODIC TABLE

1990 ◽  
Vol 05 (17) ◽  
pp. 1321-1328 ◽  
Author(s):  
NORMAN D. COOK
Keyword(s):  
Least Squares ◽  
Lattice Model ◽  
Periodic Table ◽  
Binding Energies ◽  
Superheavy Nuclei ◽  
Face Centered Cubic ◽  
Fcc Lattice ◽  
The Face ◽  
Face Centered ◽  
Best Fit

Unique among models of nuclear structure, the face-centered-cubic (FCC) lattice model predicts the attenuation of the periodic table at Z<110 and the impossibility of superheavy nuclei. The total binding energies of superheavy nuclei in the FCC model (109<Z<127) were calculated on the basis of parameters obtained from a least-squares best-fit for 914 nuclei (Z<99). No indication of increased stability was found for any of the transuranic elements.

Mößbauer-und Röntgenphotoelektronen-spektroskopische Untersuchungen an Berlinerblau-Analoga des Typs Fe[MB(CN)6] / Mößbauer and X-Ray Photoelectron Spectroscopic Studies on Prussian Blue Analogs of the Type Fe[MB(CN)6]

1983 ◽  
Vol 38 (6) ◽  
pp. 687-691 ◽  
Author(s):  
Hidenari Inoue ◽  
Ekkehard Fluck
Keyword(s):  
Prussian Blue ◽  
Spin State ◽  
High Spin State ◽  
Spectroscopic Studies ◽  
Binding Energies ◽  
Face Centered Cubic ◽  
The Face ◽  
Cubic System ◽  
Prussian Blue Analogs ◽  
Face Centered

Abstract Prussian Blue analogs of the type Fe[MB(CN)6] (MB = Pd and Pt) crystallize in the face-centered cubic system: space group Fm3m-Oh5, Z = 4. Magnetochemical and Mößbauer spectroscopic measurements have revealed that nitrogen-coordinated iron(II) ions and carbon-coordinated MB(IV) ions are in the high spin state and in the low spin state, respectively, in the temperature range 4.2 to 300 K. Upon the formation of Fe[MB(CN)6] from K2[MB(CN)6], the binding energies of N 1s, Pd 3d5/2 and Pt 4f7/2 increase while the C 1 s binding energy decreases. This tendency could be interpreted in terms of the inductive effect of iron(II) ions attached to the nitrogen end of cyanide ligands.

Embedded atom calculations of unstable stacking fault energies and surface energies in intermetallics

1997 ◽  
Vol 12 (1) ◽  
pp. 93-99 ◽  
Author(s):  
D. Farkas ◽  
S. J. Zhou ◽  
C. Vailhé ◽  
B. Mutasa ◽  
J. Panova
Keyword(s):  
Antiphase Boundary ◽  
Stacking Fault ◽  
Interatomic Potentials ◽  
Face Centered Cubic ◽  
Surface Energies ◽  
Embedded Atom ◽  
Fcc Lattice ◽  
The Face ◽  
Face Centered ◽  
Stacking Fault Energies

We performed embedded atom method calculations of surface energies and unstable stacking fault energies for a series of intermetallics for which interatomic potentials of the embedded atom type have recently been developed. These results were analyzed and applied to the prediction of relative ductility of these materials using the various current theories. Series of alloys with the B2 ordered structure were studied, and the results were compared to those in pure body-centered cubic (bcc) Fe. Ordered compounds with L12 and L10 structures based on the face-centered cubic (fcc) lattice were also studied. It was found that there is a correlation between the values of the antiphase boundary (APB) energies in B2 alloys and their unstable stacking fault energies. Materials with higher APB energies tend to have higher unstable stacking fault energies, leading to an increased tendency to brittle fracture.

scholarly journals Neighborhood M-Polynomial of Crystallographic Structures

2020 ◽  
Vol 11 (2) ◽  
pp. 9372-9381
Keyword(s):  
Cuprous Oxide ◽  
Topological Indices ◽  
Crystallographic Structure ◽  
Face Centered Cubic ◽  
Mathematical Chemistry ◽  
Fcc Lattice ◽  
The Face ◽  
Crystallographic Structures ◽  
Face Centered

The mathematical chemistry is wealthy, having tools such as polynomials and functions that can predict the properties of compounds. The M-polynomial is one of them which yields degree-based topological indices. In this work, we define the neighborhood M-polynomial to obtain neighborhood degree-based topological indices. Further, we compute some neighborhood degree-based topological indices of the face-centered cubic (fcc) lattice and the crystallographic structure of cuprous oxide (〖Cu〗_2 O) using the neighborhood M-polynomial approach. Also, the results are shown graphically.

A study of interface sliding at F.C.C.-B.C.C. boundaries in a Cu-Zn alloy

1978 ◽  
Vol 36 (1) ◽  
pp. 422-423
Author(s):  
F. Monchoux ◽  
A. Rocher ◽  
J.L. Martin
Keyword(s):  
Face Centered Cubic ◽  
Creep Tests ◽  
High Voltage Electron Microscopy ◽  
Diffusion Treatment ◽  
Voltage Electron ◽  
The Face ◽  
Face Centered ◽  
Interface Sliding ◽  
Zn Alloy ◽  
Made In

Interphase sliding is an important phenomenon of high temperature plasticity. In order to study the microstructural changes associated with it, as well as its influence on the strain rate dependence on stress and temperature, plane boundaries were obtained by welding together two polycrystals of Cu-Zn alloys having the face centered cubic and body centered cubic structures respectively following the procedure described in (1). These specimens were then deformed in shear along the interface on a creep machine (2) at the same temperature as that of the diffusion treatment so as to avoid any precipitation. The present paper reports observations by conventional and high voltage electron microscopy of the microstructure of both phases, in the vicinity of the phase boundary, after different creep tests corresponding to various deformation conditions.Foils were cut by spark machining out of the bulk samples, 0.2 mm thick. They were then electropolished down to 0.1 mm, after which a hole with thin edges was made in an area including the boundary

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