The crystallography characteristic of (Mn,Fe)S single crystal

1990 ◽  
Vol 48 (4) ◽  
pp. 898-899
Author(s):  
Jiang Xishan
Keyword(s):  
Single Crystal ◽  
Cast Steel ◽  
Point Group ◽  
Central Area ◽  
Hexagonal Crystal ◽  
Growth Step ◽  
Left And Right ◽  
Relationship Of ◽  
Fcc Structure ◽  
New Discovery

This paper reports the growth step pattern and morphology at equilibrium and growth states of (Mn,Fe)S single crystal on the wall of micro-voids in ZG25 cast steel by using scanning electron microscope. Seldom report was presented on the growth morphology and steppattern of (Mn,Fe)S single crystal.Fig.1 shows the front half of the polyhedron of(Mn,Fe)S single crystal,its central area being the square crystal plane,the two pairs of hexagons symmetrically located in the high and low, the left and right with a certain, angle to the square crystal plane.According to the symmetrical relationship of crystal, it was defined that the (Mn,Fe)S single crystal at equilibrium state is tetrakaidecahedron consisted of eight hexagonal crystal planes and six square crystal planes. The macroscopic symmetry elements of the tetrakaidecahedron correpond to Oh—n3m symmetry class of fcc structure,in which the hexagonal crystal planes are the { 111 } crystal planes group,square crystal plaits are the { 100 } crystal planes group. This new discovery of the (Mn,Fe)S single crystal provides a typical example of the point group of Oh—n3m.

scholarly journals Flux Single Crystal Growth of BaFe12−xTixO19 with Titanium Gradient

Crystals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 264
Author(s):  
Vladimir E. Zhivulin ◽  
Evgeny A. Trofimov ◽  
Olga V. Zaitseva ◽  
Dmitry A. Zherebtsov ◽  
Danil A. Uchaev ◽  
...  
Keyword(s):  
Single Crystal ◽  
Barium Hexaferrite ◽  
Solution Growth ◽  
Controlled Cooling ◽  
Substitution Level ◽  
Growth Method ◽  
Ti Substitution ◽  
Relationship Of ◽  
Top Seeded Solution Growth ◽  
The Relationship

Titanium substituted barium hexaferrite BaFe12−xTixO19 single crystal was grown by the top seeded solution growth method from flux on the seed with controlled cooling below 1175 °C. Titanium substitution level gradient in the single crystal in the vertical and horizontal directions was studied. Two planes were cut and polished. A justification for the linear gradient of Ti substitution in a BaFe12−xTixO19 single crystal is proposed; substitution levels in the center and periphery were determined. It was shown that upon growth by the top seeded solution growth method, crystals with a linear Ti substitution level gradient from x = 0.73 to x = 0.77 for a distance of 11 mm along pulling direction were obtained. The study led to the conclusion about the relationship of the gradient and changes in the composition of the nutrient solution.

Microstructure of precipitated Au Nanoclusters in Single Crystal MgO

2002 ◽  
Vol 738 ◽  
Author(s):  
C. M. Wang ◽  
S. Thevuthasan ◽  
V. Shutthanandan ◽  
A. Cavanagh ◽  
J. Walton ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Single Crystal ◽  
Critical Size ◽  
Gold Nanoclusters ◽  
Interface Structure ◽  
Feature Size ◽  
Au Nanoclusters ◽  
Au Clusters ◽  
Transmission Electron ◽  
Relationship Of

ABSTRACTGold nanoclusters dispersed in single crystal MgO were prepared by ion implantation and subsequent annealing at 1000 °C. The morphological feature, size, crystallographic orientation of the Au nanoclusters with respect to the MgO matrix, and the interface structure between the Au nanoclusters and MgO were investigated using transmission electron microscopy. During annealing, the Au clusters nucleate coherently in the MgO lattice, leading to an epitaxial orientation relationship of [010] MgO// [010]Au and (200)MgO//(200)Au that is maintained for all the Au clusters. A critical size for the coherent-semicoherent interface transition is observed to be in the range from ∼5 to 8 nm for Au clusters in MgO. Au clusters larger than this critical size exhibit faceting on the {001} planes. The precipitated Au also exhibits internal dislocations.

The single crystal electronic spectra of cis-octahedral nickel(II) diamine complexes at 10 K

1982 ◽  
Vol 60 (4) ◽  
pp. 495-500 ◽  
Author(s):  
A. B. P. Lever ◽  
I. M. Walker ◽  
P. J. McCarthy
Keyword(s):  
Single Crystal ◽  
Electronic Spectra ◽  
Spherical Harmonic ◽  
Point Group ◽  
Previous Experience ◽  
Nitrite Ion

The single crystal polarised spectra, at 10 K, of a series of nickel(II) complexes containing the cis-chromophore NiN4O2 are reported. The four N ligands are provided by the diamines N,N′-diethylethylenediamine or meso-stilbenediamine, and the two O ligands by chelating nitrate or nitrite ion. The spectra are assigned in the point group C2v(III). The energies are calculated within the Normalised Spherical Harmonic Hamiltonian and the Orbital Angular Overlap formalisms. The parameters so derived are consistent with previous experience obtained with trans-analogs once the small bite of the chelating nitrite ligand is accounted for.

Preferential growth and orientation relationship of Ag3Sn grains formed between molten Sn and (001) Ag single crystal

2009 ◽  
Vol 24 (6) ◽  
pp. 2141-2144 ◽  
Author(s):  
H.F. Zou ◽  
H.J. Yang ◽  
J. Tan ◽  
Z.F. Zhang
Keyword(s):  
Single Crystal ◽  
Orientation Relationship ◽  
Preferred Orientation ◽  
Electron Backscattered Diffraction ◽  
Preferential Growth ◽  
Relationship Of

The current study shows that there is a preferred orientation relationship between Ag3Sn and Ag in reaction between molten Sn and Ag. Due to the preferred orientation relationship, the morphology of Ag3Sn grains formed on (001) Ag single crystal is different from those formed on (011), (358) single crystal Ag, and polycrystalline Ag Facet scallop-type Ag3Sn grains formed irregularly on (011), (358) single crystal Ag, and polycrystalline Ag; whereas the regular Ag3Sn grains with parallel edges grew on (001) Ag single crystal, and they were elongated along two perpendicular directions. The orientation relationship between Ag3Sn grains and (001) Ag single crystal was determined using electron backscattered diffraction. The preferential growth of regular Ag3Sn grains with parallel edges formed on (001) Ag single crystal can be attributed to their minimum misfit.

Differentially Talented Females: Some Critical Methodological Issues for the 1980s

1982 ◽  
Vol 50 (2) ◽  
pp. 367-376
Author(s):  
S. Viterbo McCarthy
Keyword(s):  
Information Processing ◽  
Sex Role ◽  
The Other ◽  
Methodological Issues ◽  
Hemispheric Processing ◽  
Personality Correlates ◽  
Left And Right ◽  
Psychometric Studies ◽  
Relationship Of ◽  
The Relationship

Usually psychometric studies have searched for the personality correlates associated with L (high linguistic and low quantitative ability) and Q (low linguistic and high quantitative ability) patterns. Neuropsychological studies, on the other hand, have searched for the cortical processes associated with L and Q patterns or for the psychological functions (presumably linguistic and visuospatial) associated with left- and right-hemispheric processing, respectively. To further our understanding of the relationship of L and Q patterns to personality correlates and modes of information processing and to clarify conflicting interpretations attributed to sex and sex-role factors, a cohort-sequential methodology and a convergence of psychometry with neuropsychology are recommended; three critical methodological issues are explored.

scholarly journals Redetermination of the crystal structure of caesium tetrafluoridobromate(III) from single-crystal X-ray diffraction data

IUCrData ◽  
2020 ◽  
Vol 5 (1) ◽  
Author(s):  
Artem V. Malin ◽  
Sergei I. Ivlev ◽  
Roman V. Ostvald ◽  
Florian Kraus
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Diffraction Data ◽  
Point Group ◽  
Group Symmetry ◽  
Site Symmetry ◽  
X Ray Diffraction ◽  
Cation Site ◽  
X Ray ◽  
Square Planar

Caesium tetrafluoridobromate(III), CsBrF4, was crystallized in form of small blocks by melting and recrystallization. The crystal structure of CsBrF4 was redetermined from single-crystal X-ray diffraction data. In comparison with a previous study based on powder X-ray diffraction data [Ivlev et al. (2013). Z. Anorg. Allg. Chem. 639, 2846–2850], bond lengths and angles were determined with higher precision, and all atoms were refined with anisotropic displacement parameters. It was confirmed that the structure of CsBrF4 contains two square-planar [BrF4]− anions each with point group symmetry mmm, and a caesium cation (site symmetry mm2) that is coordinated by twelve fluorine atoms, forming an anticuboctahedron. CsBrF4 is isotypic with CsAuF4.

scholarly journals Morphometric Relationship of the Transverse Sinus with Sigmoid Sinus Groove and Jugular Foramen

2018 ◽  
Vol 15 (3) ◽  
pp. 49-53
Author(s):  
Suman Rijal ◽  
Pankaj Raj Nepal ◽  
Suresh Bishokarma ◽  
Kajan Ranabhat ◽  
Dinesh Nath Gongal
Keyword(s):  
Analytical Study ◽  
Sinus Thrombosis ◽  
Neurological Diseases ◽  
Jugular Foramen ◽  
Transverse Sinus ◽  
Sigmoid Sinus ◽  
Positive Linear Correlation ◽  
Left And Right ◽  
Relationship Of ◽  
Transverse Sinuses

Cranial venous sinus anatomy is fundamental in neurosurgery and radiology, especially in surgical planning and treatment of neurological diseases. In this study, we aimed to study the morphometric relationship of the transverse sinus with sigmoid sinus groove and jugular foramen and imply if this relationship could aid in diagnosing the transverse sinus thrombosis. This is a retrospective analytical study conducted in our center among 30 patients who underwent Computed Tomography (CT) venogram during a period of 1 year. Diameter of transverse sinus and sigmoid groove at midpoint, and diameter of jugular foramen as it enters the skull base were collected. Relation of transverse sinus with sigmoid sinus groove and jugular foramen was analyzed. There were 60 transverse sinuses in the study with left and right being 50% (30 each). Mean age of patients collected was 53.20 years. There were 43.3% male and 56.7% female patients. Diameter of the Transverse sinus has statistically significantly linear relationship with the diameter of the sigmoid sinus groove and jugular foramen (p<0.001) and was positively correlated (r= 0.651 and 0.624 respectively). Diameter of the transverse sinus has significant positive linear correlation with the sigmoid sinus groove and jugular foramen.

scholarly journals Different laterality indexes are poorly correlated with one another but consistently show the tendency of males and females to be more left- and right-lateralized, respectively

2020 ◽  
Vol 7 (4) ◽  
pp. 191700 ◽  
Author(s):  
Carlos Buenaventura Castillo ◽  
Andy G. Lynch ◽  
Silvia Paracchini
Keyword(s):  
Grip Strength ◽  
Cost Effective ◽  
Strength Analysis ◽  
Dominant Hand ◽  
Sex Effects ◽  
Right Hand ◽  
Left And Right ◽  
Males And Females ◽  
Relationship Of ◽  
The Relationship

The most common way to assess handedness is based on the preferred hand for writing, leading to a binary (left or right) trait. Handedness can also be assessed as a continuous trait with laterality indexes, but these are not time- and cost-effective, and are not routinely collected. Rarely, different handedness measures are collected for the same individuals. Here, we assessed the relationship of preferred hand for writing with four laterality indexes, reported in previous literature, derived from measures of dexterity (pegboard task, marking squares and sorting matches) and strength (grip strength), available in a range of N = 6664–8069 children from the ALSPAC cohort. Although all indexes identified a higher proportion of individuals performing better with their right hand, they showed low correlation with each other (0.08–0.3). Left handers were less consistent compared to right handers in performing better with their dominant hand, but that varied across indexes, i.e. 13% of left handers performed better with their right hand on marking squares compared to 48% for sorting matches and grip strength. Analysis of sex effects on the laterality indexes showed that males and females tend to be, on all measures, more left- and right-lateralized, respectively. Males were also over-represented among the individuals performing equally with both hands suggesting they had a higher tendency to be weakly lateralized. This study shows that different handedness measures tap into different dimensions of laterality and cannot be used interchangeably. The trends observed across indexes for males and females suggest that sex effects should be taken into account in handedness and laterality studies.

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