scholarly journals Exploratory studies of silicate melt structure at high pressures and temperatures by in situ X-ray diffraction

2004 ◽  
Vol 109 (B3) ◽  
Author(s):  
Nobumasa Funamori
Keyword(s):  
High Pressures ◽  
Silicate Melt ◽  
X Ray Diffraction ◽  
Melt Structure ◽  
X Ray ◽  
High Pressures And Temperatures

Transformation from molecular to polymeric nitrogen at high pressures and temperatures: In situ x-ray diffraction study

2008 ◽  
Vol 93 (9) ◽  
pp. 091907 ◽  
Author(s):  
I. A. Trojan ◽  
M. I. Eremets ◽  
S. A. Medvedev ◽  
A. G. Gavriliuk ◽  
V. B. Prakapenka
Keyword(s):  
Diffraction Study ◽  
High Pressures ◽  
X Ray Diffraction ◽  
X Ray ◽  
High Pressures And Temperatures ◽  
Polymeric Nitrogen

scholarly journals The thermal equation of state of FeTiO3 ilmenite based on in situ X-ray diffraction at high pressures and temperatures

2010 ◽  
Vol 95 (11-12) ◽  
pp. 1708-1716 ◽  
Author(s):  
E. J. Tronche ◽  
M. van Kan Parker ◽  
J. de Vries ◽  
Y. Wang ◽  
T. Sanehira ◽  
...  
Keyword(s):  
Equation Of State ◽  
High Pressures ◽  
X Ray Diffraction ◽  
Thermal Equation ◽  
X Ray ◽  
Thermal Equation Of State ◽  
High Pressures And Temperatures

In situ X-ray diffraction investigation of lawsonite and zoisite at high pressures and temperatures

2000 ◽  
Vol 85 (1) ◽  
pp. 206-216 ◽  
Author(s):  
Klaus-D. Grevel ◽  
Elke Ursula Nowlan ◽  
Detlef W. Fasshauer ◽  
Michael Burchard
Keyword(s):  
High Pressures ◽  
X Ray Diffraction ◽  
X Ray ◽  
High Pressures And Temperatures

Dehydration and decomposition of pyrophyllite at high pressures: electrical conductivity and X-ray diffraction studies to 5 GPa

1997 ◽  
Vol 34 (6) ◽  
pp. 875-882 ◽  
Author(s):  
Tara L. Hicks ◽  
Richard A. Secco
Keyword(s):  
Electrical Conductivity ◽  
South African ◽  
Pressure Dependence ◽  
High Pressures ◽  
Ionic Conduction ◽  
Temperature Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Temperature Dependence Of Conductivity

The dehydration and decomposition of South African pyrophyllite were studied in the pressure range 2.5–5.0 GPa and in the temperature (T) range 295–1473 K using both in situ electrical conductivity measurements and X-ray diffraction studies on the recovered samples. Activation energies for conduction (Qc) vary in the range 0.02–0.07 eV for T ≤ 500 K where the dominant conduction mode is electronic, and Qc is in the range 1.10–1.28 eV for T ≥ 500 K where ionic conduction dominates. Abrupt changes in the isobaric temperature dependence of conductivity mark the onset of dehydration and subsequent decomposition into kyanite plus quartz–coesite. At 2.5 GPa, South African pyrophyllite forms the dehydroxylate phase at 760 K with a pressure dependence of ~30 K/GPa and complete decomposition follows at 1080 K with a pressure dependence of ~41 K/GPa. The resulting pressure–temperature phase diagram is in very good agreement with many previous studies at 1 atm (101.325 kPa).

High-Pressure Phase Transitions of Cubic Y 2 O 3 under High Pressures by In-situ Synchrotron X-Ray Diffraction

2019 ◽  
Vol 36 (4) ◽  
pp. 046103 ◽  
Author(s):  
Sheng Jiang ◽  
Jing Liu ◽  
Xiao-Dong Li ◽  
Yan-Chun Li ◽  
Shang-Ming He ◽  
...  
Keyword(s):  
High Pressure ◽  
Phase Transitions ◽  
High Pressures ◽  
High Pressure Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Pressure Phase
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