In situ X-ray observation of decomposition of superhydrous phase B at high pressure and temperature

2003 ◽  
Vol 30 (2) ◽  
Author(s):  
Eiji Ohtani ◽  
Motomasa Toma ◽  
Tomoaki Kubo ◽  
Tadashi Kondo ◽  
Takumi Kikegawa
Keyword(s):  
High Pressure ◽  
High Pressure And Temperature ◽  
X Ray

scholarly journals The Viscosity and Atomic Structure of Volatile-Bearing Melilititic Melts at High Pressure and Temperature and the Transport of Deep Carbon

Minerals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 267 ◽  
Author(s):  
Vincenzo Stagno ◽  
Veronica Stopponi ◽  
Yoshio Kono ◽  
Annalisa D’Arco ◽  
Stefano Lupi ◽  
...  
Keyword(s):  
Experimental Data ◽  
High Pressure ◽  
Atomic Structure ◽  
Ex Situ ◽  
X Ray Diffraction ◽  
High Pressure And Temperature ◽  
X Ray ◽  
Falling Sphere ◽  
Basaltic Melts

Understanding the viscosity of mantle-derived magmas is needed to model their migration mechanisms and ascent rate from the source rock to the surface. High pressure–temperature experimental data are now available on the viscosity of synthetic melts, pure carbonatitic to carbonate–silicate compositions, anhydrous basalts, dacites and rhyolites. However, the viscosity of volatile-bearing melilititic melts, among the most plausible carriers of deep carbon, has not been investigated. In this study, we experimentally determined the viscosity of synthetic liquids with ~31 and ~39 wt% SiO2, 1.60 and 1.42 wt% CO2 and 5.7 and 1 wt% H2O, respectively, at pressures from 1 to 4.7 GPa and temperatures between 1265 and 1755 °C, using the falling-sphere technique combined with in situ X-ray radiography. Our results show viscosities between 0.1044 and 2.1221 Pa·s, with a clear dependence on temperature and SiO2 content. The atomic structure of both melt compositions was also determined at high pressure and temperature, using in situ multi-angle energy-dispersive X-ray diffraction supported by ex situ microFTIR and microRaman spectroscopic measurements. Our results yield evidence that the T–T and T–O (T = Si,Al) interatomic distances of ultrabasic melts are higher than those for basaltic melts known from similar recent studies. Based on our experimental data, melilititic melts are expected to migrate at a rate ~from 2 to 57 km·yr−1 in the present-day or the Archaean mantle, respectively.

Laser heated diamond cell system at the Advanced Photon Source for in situ x-ray measurements at high pressure and temperature

2001 ◽  
Vol 72 (2) ◽  
pp. 1273 ◽  
Author(s):  
Guoyin Shen ◽  
Mark L. Rivers ◽  
Yanbin Wang ◽  
Stephen R. Sutton
Keyword(s):  
High Pressure ◽  
Cell System ◽  
High Pressure And Temperature ◽  
X Ray ◽  
Laser Heated ◽  
Photon Source

scholarly journals Stability of CaCl2-type and α-PbO2-type SiO2at high pressure and temperature determined by in-situ X-ray measurements

2003 ◽  
Vol 30 (5) ◽  
pp. n/a-n/a ◽  
Author(s):  
Motohiko Murakami ◽  
Kei Hirose ◽  
Shigeaki Ono ◽  
Yasuo Ohishi
Keyword(s):  
High Pressure ◽  
High Pressure And Temperature ◽  
X Ray

In situ X-ray observations of the decomposition of brucite and the graphite-diamond conversion in aqueous fluid at high pressure and temperature

2002 ◽  
Vol 29 (7) ◽  
pp. 439-445 ◽  
Author(s):  
T. Okada ◽  
W. Utsumi ◽  
H. Kaneko ◽  
M. Yamakata ◽  
O. Shimomura
Keyword(s):  
High Pressure ◽  
Aqueous Fluid ◽  
High Pressure And Temperature ◽  
X Ray

In situ determination of the spinel-post-spinel transition in Fe3O4 at high pressure and temperature by synchrotron X-ray diffraction

2011 ◽  
Vol 96 (5-6) ◽  
pp. 820-827 ◽  
Author(s):  
K. Schollenbruch ◽  
A. B. Woodland ◽  
D. J. Frost ◽  
Y. Wang ◽  
T. Sanehira ◽  
...  
Keyword(s):  
High Pressure ◽  
X Ray Diffraction ◽  
High Pressure And Temperature ◽  
X Ray

In situ Raman and X-ray diffraction studies on the high pressure and temperature stability of methane hydrate up to 55 GPa

2018 ◽  
Vol 148 (16) ◽  
pp. 164503 ◽  
Author(s):  
Hirokazu Kadobayashi ◽  
Hisako Hirai ◽  
Hiroaki Ohfuji ◽  
Michika Ohtake ◽  
Yoshitaka Yamamoto
Keyword(s):  
High Pressure ◽  
Methane Hydrate ◽  
Temperature Stability ◽  
X Ray Diffraction ◽  
High Pressure And Temperature ◽  
X Ray ◽  
In Situ Raman

High-speed tomography under extreme conditions at the PSICHE beamline of the SOLEIL Synchrotron

2018 ◽  
Vol 25 (3) ◽  
pp. 818-825 ◽  
Author(s):  
E. Boulard ◽  
A. King ◽  
N. Guignot ◽  
J.-P. Deslandes ◽  
Y. Le Godec ◽  
...  
Keyword(s):  
High Pressure ◽  
High Speed ◽  
Extreme Conditions ◽  
Direct Visualization ◽  
High Pressure And Temperature ◽  
X Ray ◽  
The Press ◽  
Algebraic Reconstruction Techniques ◽  
High Pressure Apparatus

In situmicrotomography at high pressure and temperature has developed rapidly in the last decade, driven by the development of new high-pressure apparatus. It is now routinely possible to characterize material under high pressure with acquisition times for tomograms of the order of tens of minutes. Here, advantage was taken of the possibility to combine the use of a pink beam projected through a standard Paris–Edinburgh press in order to demonstrate the possibility to perform high-speed synchrotron X-ray tomography at high pressure and temperature allowing complete high-resolution tomograms to be acquired in about 10 s. This gives direct visualization to rapidly evolving or unstable systems, such as flowing liquids or reacting components, and avoids assumptions in the interpretation of quenched samples. Using algebraic reconstruction techniques allows the missing angle artefacts that result from the columns of the press to be minimized.

scholarly journals In situ X–ray diffraction studies of hydrous aluminosilicate at high pressure and temperature

2018 ◽  
Vol 113 (2) ◽  
pp. 106-111 ◽  
Author(s):  
Ryota ABE ◽  
Yuki SHIBAZAKI ◽  
Shin OZAWA ◽  
Itaru OHIRA ◽  
Hiromu TOBE ◽  
...  
Keyword(s):  
High Pressure ◽  
X Ray Diffraction ◽  
High Pressure And Temperature ◽  
X Ray

Combined resistive and laser heating technique for in situ radial X-ray diffraction in the diamond anvil cell at high pressure and temperature

2013 ◽  
Vol 84 (2) ◽  
pp. 025118 ◽  
Author(s):  
Lowell Miyagi ◽  
Waruntorn Kanitpanyacharoen ◽  
Selva Vennila Raju ◽  
Pamela Kaercher ◽  
Jason Knight ◽  
...  
Keyword(s):  
High Pressure ◽  
Laser Heating ◽  
Diamond Anvil Cell ◽  
X Ray Diffraction ◽  
High Pressure And Temperature ◽  
X Ray ◽  
Diamond Anvil

Strength measurement of boron suboxide B6O at high pressure and temperature using in situ synchrotron X-ray diffraction

2008 ◽  
Vol 28 (3) ◽  
pp. 423-430 ◽  
Author(s):  
Jiuhua Chen ◽  
Yunpeng Yang ◽  
Tony Yu ◽  
Jianzhong Zhang ◽  
Yusheng Zhao ◽  
...  
Keyword(s):  
High Pressure ◽  
X Ray Diffraction ◽  
Strength Measurement ◽  
High Pressure And Temperature ◽  
X Ray ◽  
Boron Suboxide
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