In situ neutron powder diffraction and structure determination in controlled humidities

2009 ◽  
pp. 7527 ◽  
Author(s):  
Valeska P. Ting ◽  
Paul F. Henry ◽  
Marc Schmidtmann ◽  
Chick C. Wilson ◽  
Mark T. Weller
Keyword(s):  
Powder Diffraction ◽  
Structure Determination ◽  
Neutron Powder Diffraction

In Situ Neutron Powder Diffraction Study of Ti3SiC2 Synthesis

2004 ◽  
Vol 84 (10) ◽  
pp. 2281-2288 ◽  
Author(s):  
Erdong Wu ◽  
Erich H. Kisi ◽  
Shane J. Kennedy ◽  
Andrew J. Studer
Keyword(s):  
Diffraction Study ◽  
Powder Diffraction ◽  
Neutron Powder Diffraction

Oxygen Ordered Phases in LaxSr1−xMnOy(0 ≤x≤ 0.2, 2.5 ≤ y ≤ 3): An In situ Neutron Powder Diffraction Study

2008 ◽  
Vol 20 (4) ◽  
pp. 1636-1645 ◽  
Author(s):  
Leopoldo Suescun ◽  
Bogdan Dabrowski ◽  
James Mais ◽  
Steven Remsen ◽  
James W. Richardson ◽  
...  
Keyword(s):  
Diffraction Study ◽  
Powder Diffraction ◽  
Neutron Powder Diffraction ◽  
Ordered Phases

Structure Determination of CaH2P2O7 From In Situ Powder Diffraction Data

2000 ◽  
Vol 321-324 ◽  
pp. 374-379 ◽  
Author(s):  
J. Trommer ◽  
M. Schneider ◽  
H. Worzala ◽  
Andrew N. Fitch
Keyword(s):  
Powder Diffraction ◽  
Diffraction Data ◽  
Structure Determination ◽  
Powder Diffraction Data

Mn-Mg disordering in cummingtonite: a high-temperature neutron powder diffraction study

2000 ◽  
Vol 64 (2) ◽  
pp. 255-266 ◽  
Author(s):  
J. J. Reece ◽  
S. A. T. Redfern ◽  
M. D. Welch ◽  
C. M. B. Henderson
Keyword(s):  
Crystal Structure ◽  
Phase Transition ◽  
New York ◽  
High Temperature ◽  
Powder Diffraction ◽  
Elevated Temperatures ◽  
Neutron Powder Diffraction ◽  
Site Preference ◽  
A Site

AbstractThe crystal structure of a manganoan cummingtonite, composition [M4](Na0.13Ca0.41Mg0.46Mn1.00) [M1,2,3](Mg4.87Mn0.13)(Si8O22)(OH)2, (Z = 2), a = 9.5539(2) Å, b = 18.0293(3) Å, c = 5.2999(1) Å, β = 102.614(2)° from Talcville, New York, has been refined at high temperature using in situ neutron powder diffraction. The P21/m to C2/m phase transition, observed as spontaneous strains +ε1 = −ε2, occurs at ˜107°C. Long-range disordering between Mg2+ and Mn2+ on the M(4) and M(2) sites occurs above 550°C. Mn2+ occupies the M(4) and M(2) sites preferring M(4) with a site-preference energy of 24.6±1.5 kJ mol−1. Disordering induces an increase in XMnM2 and decrease in XMnM4 at elevated temperatures. Upon cooling, the ordered states of cation occupancy are ‘frozen in’ and strains in lattice parameters are maintained, suggesting that re-equilibration during cooling has not taken place.

Performance of Cu-coated vanadium cans forin situneutron powder diffraction experiments on hydrogen storage materials

2012 ◽  
Vol 45 (5) ◽  
pp. 902-905 ◽  
Author(s):  
Roxana Flacau ◽  
Jim Bolduc ◽  
Thomas Bibienne ◽  
Jacques Huot ◽  
Helmut Fritzsche
Keyword(s):  
Hydrogen Storage ◽  
High Temperatures ◽  
Powder Diffraction ◽  
Neutron Powder Diffraction ◽  
Simple Design ◽  
Hydrogen Storage Materials ◽  
High Quality ◽  
Handling System ◽  
Storage Materials

In situneutron powder diffraction (NPD) measurements of hydrogenation processes taking place at high temperatures pose difficulties related to the choice of sample can material. This article describes a simple design for a copper-coated vanadium can and its connection to the gas-handling system, tested up to 523 K. High-quality NPD patterns of TiV1.2Mn0.8body-centred cubic alloy, as-cast and partially hydrogenated, were collected at 373 K and deuterium pressures up to 2 bar (200 kPa).

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