scholarly journals Superspace Group Approach to the Crystal Structure of Thermoelectric Higher Manganese Silicides MnSi

10.5772/36666 ◽  
2012 ◽  
Author(s):  
Yuzuru Miyazaki
Keyword(s):  
Crystal Structure ◽  
Group Approach ◽  
Higher Manganese Silicides

Superspace Group Approach to the Crystal Structure of Na0.5CoO2

2007 ◽  
Vol 46 (1) ◽  
pp. 304-310 ◽  
Author(s):  
Dai Igarashi ◽  
Yuzuru Miyazaki ◽  
Kunio Yubuta ◽  
Tsuyoshi Kajitani
Keyword(s):  
Crystal Structure ◽  
Group Approach

Crystal Structure of Ba12Co11O33. Reinvestigation Using the Superspace Group Approach of Orthorhombic Oxides A1+x(A‘xB1-x)O3Based on [A8O24] and [A8A‘2O18] Layers

2002 ◽  
Vol 14 (8) ◽  
pp. 3349-3363 ◽  
Author(s):  
J. Darriet ◽  
L. Elcoro ◽  
A. El Abed ◽  
E. Gaudin ◽  
J. M. Perez-Mato
Keyword(s):  
Crystal Structure ◽  
Group Approach

scholarly journals Crystal Structure and Thermoelectric Properties of Lightly Substituted Higher Manganese Silicides

Materials ◽  
2018 ◽  
Vol 11 (6) ◽  
pp. 926 ◽  
Author(s):  
Yuzuru Miyazaki ◽  
Haruki Hamada ◽  
Hiroki Nagai ◽  
Kei Hayashi
Keyword(s):  
Crystal Structure ◽  
Thermoelectric Properties ◽  
Higher Manganese Silicides

Crystal structure, electronic structure and thermoelectric properties of β- and γ-Zn4Sb3 thermoelectrics: a (3 + 1)-dimensional superspace group approach

2020 ◽  
Vol 8 (27) ◽  
pp. 9205-9212
Author(s):  
Shun Yoshioka ◽  
Kei Hayashi ◽  
Aisaku Yokoyama ◽  
Wataru Saito ◽  
Hezhang Li ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Electronic Structure ◽  
Thermoelectric Properties ◽  
Structure Model ◽  
Group Approach ◽  
Composite Crystal

Using a (3 + 1)-dimensional ((3 + 1)-D) superspace group approach, a composite crystal structure model for β- and γ-phases of Zn4Sb3 is constructed. Intercalation of Zn atoms into the Zni site is found, which affects thermoelectric properties.

Crystal Structure Determination of Glycerol-Containing Lipids from Electron Diffraction Data. Use of Analog Compounds Based upon Configurational Isomers of Cyclopentane-1, 2, 3-TRIOL

1977 ◽  
Vol 35 ◽  
pp. 24-25
Author(s):  
Douglas L. Dorset ◽  
Anthony J. Hancock
Keyword(s):  
Crystal Structure ◽  
Electron Diffraction ◽  
Diffraction Data ◽  
Structure Determination ◽  
Crystal Surface ◽  
Coherent Scattering ◽  
Crystal Structure Determination ◽  
Electron Diffraction Data ◽  
Polar Group ◽  
Axis Orientation

Lipids containing long polymethylene chains were among the first compounds subjected to electron diffraction structure analysis. It was only recently realized, however, that various distortions of thin lipid microcrystal plates, e.g. bends, polar group and methyl end plane disorders, etc. (1-3), restrict coherent scattering to the methylene subcell alone, particularly if undistorted molecular layers have well-defined end planes. Thus, ab initio crystal structure determination on a given single uncharacterized natural lipid using electron diffraction data can only hope to identify the subcell packing and the chain axis orientation with respect to the crystal surface. In lipids based on glycerol, for example, conformations of long chains and polar groups about the C-C bonds of this moiety still would remain unknown.One possible means of surmounting this difficulty is to investigate structural analogs of the material of interest in conjunction with the natural compound itself. Suitable analogs to the glycerol lipids are compounds based on the three configurational isomers of cyclopentane-1,2,3-triol shown in Fig. 1, in which three rotameric forms of the natural glycerol derivatives are fixed by the ring structure (4-7).

Spherulitic crystal growth in the prodissoconch larval of Crassostrea virginica

1983 ◽  
Vol 41 ◽  
pp. 518-519
Author(s):  
George G. Cocks ◽  
Louis Leibovitz ◽  
DoSuk D. Lee
Keyword(s):  
Crystal Structure ◽  
Crassostrea Virginica ◽  
Crystal Orientation ◽  
Developmental Changes ◽  
Gastrula Stage ◽  
Orthorhombic Crystal ◽  
Orthorhombic Crystal Structure ◽  
Stages Of Growth ◽  
Early Stages ◽  
Initial Deposition

Our understanding of the structure and the formation of inorganic minerals in the bivalve shells has been considerably advanced by the use of electron microscope. However, very little is known about the ultrastructure of valves in the larval stage of the oysters. The present study examines the developmental changes which occur between the time of conception to the early stages of Dissoconch in the Crassostrea virginica(Gmelin), focusing on the initial deposition of inorganic crystals by the oysters.The spawning was induced by elevating the temperature of the seawater where the adult oysters were conditioned. The eggs and sperm were collected separately, then immediately mixed for the fertilizations to occur. Fertilized animals were kept in the incubator where various stages of development were stopped and observed. The detailed analysis of the early stages of growth showed that CaCO3 crystals(aragonite), with orthorhombic crystal structure, are deposited as early as gastrula stage(Figuresla-b). The next stage in development, the prodissoconch, revealed that the crystal orientation is in the form of spherulites.

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