Cobaltous Oxide with the Zinc Blende/Wurtzite-type Crystal Structure

Nature ◽  
1962 ◽  
Vol 193 (4818) ◽  
pp. 867-867 ◽  
Author(s):  
M. J. REDMAN ◽  
E. G. STEWARD
Keyword(s):  
Crystal Structure ◽  
Zinc Blende ◽  
Type Crystal

scholarly journals Ge0.57Ti0.43O2: a new high-pressure material with rutile-type crystal structure

2018 ◽  
Vol 74 (7) ◽  
pp. 1010-1012 ◽  
Author(s):  
Emil Stoyanov ◽  
Kurt Leinenweber ◽  
Thomas L. Groy ◽  
Abds-Sami Malik
Keyword(s):  
Crystal Structure ◽  
Solid Solution ◽  
High Pressure ◽  
Single Crystals ◽  
Structure Type ◽  
Site Symmetry ◽  
Rutile Structure ◽  
High Pressure And Temperature ◽  
Atom Position ◽  
Type Crystal

Single crystals of a GeO2–TiO2 solid solution with the corresponding composition Ge0.57Ti0.43O2 (germanium titanium tetraoxide) were obtained by devitrification of germania-titania glass at high pressure and temperature. The new compound crystallizes in the rutile structure type (space group P42/mnm), where Ge and Ti share the same position M (site symmetry m.mm), with occupancy values of 0.57 (3) and 0.43 (3), respectively, and one O-atom position (m.2m). The M site is in a sixfold O-atom coordination and, as in the original TiO2 rutile structure, an elongation of the O—M—O bonds along the c-axis direction of the coordination polyhedron and deviation of the angles from 90° lead to a decrease in the coordination symmetry from octahedral to tetragonal. The Ge and Ti atoms are fully disordered in the structure, which indicates that the rutile structure is surprisingly pliant given the differing sizes of the two cations.

Crystal Structure Control of ZnxCd1−xS Alloyed Nanocrystals and Structural Dependent Fluorescence Properties

NANO ◽  
2019 ◽  
Vol 14 (08) ◽  
pp. 1950098
Author(s):  
Kaili Qin ◽  
Jingling Li ◽  
Yanqing Zhu ◽  
Xueqing Xu ◽  
Xiudi Xiao ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Crystal Phase ◽  
Fluorescence Properties ◽  
Pure Zinc ◽  
Structure Control ◽  
Zinc Blende ◽  
Coating Method ◽  
Ratio Condition ◽  
One Step ◽  
Zinc Blende Structure

Crystal structure control is so important to the fluorescence properties that each element should be considered carefully. In conventional synthesis of ZnxCd[Formula: see text]S alloyed nanocrystals (NCs), most of studies focus on ligand–surface interaction on the formation of either zinc blende or wurtzite ZnxCd[Formula: see text]S nanocrystals, instead of the reactant source. In this work, mixed crystal phase was found easily in ZnxCd[Formula: see text]S alloyed NCs when reaction proceeded at high Zn/Cd source ratio condition. Therefore, we regulate the Zn/Cd ratio to obtain relative pure zinc-blende structure, and study the influence of structure change on the fluorescence properties. Further, we have proposed a two-step ZnS coating method to acquire ZnxCd[Formula: see text]S/ZnS NCs with separated crystal-phase between core and shell. Compared with maximum QY of 81% for ZnxCd[Formula: see text]S/ZnS NCs synthesized by conventional one-step coating method, the performance of the optimized NCs has significantly improved with maximum QY of 93%.

U(Ni1−xGax)5 novel compounds with CaCu5-type: crystal structure and magnetism

1995 ◽  
Vol 139 (1-2) ◽  
pp. 23-32 ◽  
Author(s):  
A. Zelinsky ◽  
Yu.N. Grin ◽  
K. Hiebl ◽  
P. Rogl ◽  
H. Noël ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Type Crystal

scholarly journals Electric Conduction of MgCr2O4 with Spinel Type Crystal Structure.

1999 ◽  
Vol 107 (1246) ◽  
pp. 541-545 ◽  
Author(s):  
Hiroki MORIWAKE ◽  
Takuoki HATA ◽  
Masaaki KATSUMATA ◽  
Masayuki TAKAHASHI ◽  
Isao SHIMONO
Keyword(s):  
Crystal Structure ◽  
Electric Conduction ◽  
Spinel Type ◽  
Type Crystal

Magnetic arrangements in uranium compounds with UGeTe-type crystal structure

1974 ◽  
Vol 25 (2) ◽  
pp. 637-644 ◽  
Author(s):  
J. Lorenc ◽  
J. Przystawa ◽  
A. Zygmunt
Keyword(s):  
Crystal Structure ◽  
Uranium Compounds ◽  
Type Crystal
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