X-ray diffraction and Raman studies of the CuGeO3(III)–(IV) transformation under high pressures

2005 ◽  
Vol 61 (10) ◽  
pp. 2418-2422 ◽  
Author(s):  
Li Chung Ming ◽  
Shiv K. Sharma ◽  
A.J. Jayaraman ◽  
Y. Kobayashi ◽  
E. Suzuki ◽  
...  
Keyword(s):  
High Pressures ◽  
X Ray Diffraction ◽  
X Ray

Monoclinic FeO at high pressures

2008 ◽  
Vol 223 (7/2008) ◽  
Author(s):  
Innokenty Kantor ◽  
Alexander Kurnosov ◽  
Catherine McCammon ◽  
Leonid Dubrovinsky
Keyword(s):  
High Pressure ◽  
Iron Oxide ◽  
Single Crystal ◽  
Diffraction Study ◽  
High Pressures ◽  
X Ray Diffraction ◽  
X Ray

AbstractA high-pressure quasi-single crystal X-ray diffraction study of a synthetic iron oxide Fe

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).

scholarly journals X-Ray Diffraction and Dielectric Measurements of PbZrO3 under High Pressures.

1998 ◽  
Vol 7 ◽  
pp. 310-312 ◽  
Author(s):  
Y. Kobayashi ◽  
S. Endo ◽  
K. Deguchi ◽  
L. C. Ming ◽  
S. R. Shieh ◽  
...  
Keyword(s):  
High Pressures ◽  
Dielectric Measurements ◽  
X Ray Diffraction ◽  
X Ray

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

Apparatus for X-ray diffraction analysis at high pressures

2004 ◽  
Vol 71 (3-4) ◽  
pp. 741-742 ◽  
Author(s):  
N.V. Novikov ◽  
L.K. Shvedov ◽  
V.D. Dobrovolsky ◽  
Y.N. Krivosheya ◽  
O.G. Radchenko
Keyword(s):  
Diffraction Analysis ◽  
High Pressures ◽  
X Ray Diffraction ◽  
X Ray

X-ray diffraction and Raman spectra of merrillite at high pressures

2020 ◽  
Vol 40 (3) ◽  
pp. 411-422
Author(s):  
Muhua Jia ◽  
Xin Hu ◽  
Yungui Liu ◽  
Sheng Jiang ◽  
Xiang Wu ◽  
...  
Keyword(s):  
Raman Spectra ◽  
High Pressures ◽  
X Ray Diffraction ◽  
X Ray
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