scholarly journals Development of High-Pressure Technique for Single-Crystal Magnetic Neutron Diffraction under 10 GPa

hamon ◽  
2008 ◽  
Vol 18 (4) ◽  
pp. 208-213 ◽  
Author(s):  
Toyotaka Osakabe
Keyword(s):  
High Pressure ◽  
Neutron Diffraction ◽  
Single Crystal

scholarly journals High pressure single-crystal neutron diffraction of DKDP

2005 ◽  
Vol 61 (a1) ◽  
pp. c374-c375
Author(s):  
C. L. Bull ◽  
M. Guthrie ◽  
R. J. Nelmes ◽  
J. S. Loveday ◽  
T. Strässle ◽  
...  
Keyword(s):  
High Pressure ◽  
Neutron Diffraction ◽  
Single Crystal

Crystal structure of a high-pressure phase of magnesium chloride hexahydrate determined by in-situ X-ray and neutron diffraction methods

2019 ◽  
Vol 75 (12) ◽  
pp. 1605-1612 ◽  
Author(s):  
Keishiro Yamashita ◽  
Kazuki Komatsu ◽  
Takanori Hattori ◽  
Shinichi Machida ◽  
Hiroyuki Kagi
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Neutron Diffraction ◽  
Single Crystal ◽  
Magnesium Chloride ◽  
High Pressure Phase ◽  
X Ray ◽  
Magnesium Chloride Hexahydrate ◽  
Chloride Hexahydrate ◽  
Pressure Phase

A high-pressure phase of magnesium chloride hexahydrate (MgCl2·6H2O-II) and its deuterated counterpart (MgCl2·6D2O-II) have been identified for the first time by in-situ single-crystal X-ray and powder neutron diffraction. The crystal structure was analyzed by the Rietveld method for the neutron diffraction pattern based on the initial structure determined by single-crystal X-ray diffraction. This high-pressure phase has a similar framework to that in the known ambient-pressure phase, but exhibits some structural changes with symmetry reduction caused by a subtle modification in the hydrogen-bond network around the Mg(H2O)6 octahedra. These structural features reflect the strain in the high-pressure phases of MgCl2 hydrates.

Neutron diffraction studies of the magnetic structures of Tb0.76Y0.24 single crystal under high pressure

1999 ◽  
Vol 60 (8-9) ◽  
pp. 1225-1228
Author(s):  
T Kosugi ◽  
K Amezawa ◽  
N Yamamoto ◽  
S Kawano ◽  
J.A Fernandez-Baca
Keyword(s):  
High Pressure ◽  
Neutron Diffraction ◽  
Single Crystal ◽  
Magnetic Structures

Pressure-Induced Antiferromagnetic Order in Filled Skutterudite PrFe4P12 Studied by Single-Crystal High-Pressure Neutron Diffraction

2010 ◽  
Vol 79 (3) ◽  
pp. 034711 ◽  
Author(s):  
Toyotaka Osakabe ◽  
Keitaro Kuwahara ◽  
Daichi Kawana ◽  
Kazuaki Iwasa ◽  
Daisuke Kikuchi ◽  
...  
Keyword(s):  
High Pressure ◽  
Neutron Diffraction ◽  
Single Crystal ◽  
Antiferromagnetic Order ◽  
Filled Skutterudite

High-pressure single-crystal neutron diffraction (to 20 kbar) using a pulsed source: preliminary investigation of Tl3PSe4

1985 ◽  
Vol 18 (3) ◽  
pp. 145-149 ◽  
Author(s):  
R. W. Alkire ◽  
A. C. Larson ◽  
P. J. Vergamini ◽  
J. E. Schirber ◽  
B. Morosin
Keyword(s):  
High Pressure ◽  
Neutron Diffraction ◽  
Single Crystal ◽  
Preliminary Investigation

scholarly journals Determination of hydrogen site and occupancy in hydrous Mg2SiO4 spinel by single-crystal neutron diffraction

2018 ◽  
Vol 74 (1) ◽  
pp. 115-120 ◽  
Author(s):  
Narangoo Purevjav ◽  
Takuo Okuchi ◽  
Xiaoping Wang ◽  
Christina Hoffmann ◽  
Naotaka Tomioka
Keyword(s):  
High Pressure ◽  
Neutron Diffraction ◽  
Single Crystal ◽  
Diffraction Analysis ◽  
Natural Occurrence ◽  
Hydration Mechanism ◽  
Neutron Time ◽  
Important Host ◽  
Pressure Synthesis

Ringwoodite [(Mg,Fe2+)2SiO4 spinel] has been considered as one of the most important host minerals of water in the Earth's deep mantle. Its extensive hydration was observed in high-pressure synthesis experiments and also by its natural occurrence. Water can dissolve into ringwoodite as structurally bound hydrogen cations by substituting other cations, although the hydrogen site and its occupancy remain unclear. In this study, neutron time-of-flight single-crystal Laue diffraction analysis was carried out for synthetic hydrous ringwoodite. Hydrogen cations were found only in the sites in MgO6 octahedra in the ringwoodite structure, which compensated the reduced occupancies of both magnesium and silicon cations. The refined cation occupancies suggest that the most plausible hydration mechanism is that three hydrogen cations simultaneously occupy an MgO6 octahedron, whereas four such hydrogenated octahedra surround a vacant SiO4 tetrahedron.

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