scholarly journals Experimental study of the stability of cordierite and garnet in pelitic compositions at high pressures and temperatures

1973 ◽  
Vol 38 (2) ◽  
pp. 151-166 ◽  
Author(s):  
B. J. Hensen ◽  
D. H. Green
Keyword(s):  
Experimental Study ◽  
High Pressures ◽  
High Pressures And Temperatures ◽  
The Stability

EXPERIMENTAL STUDY OF THE SOLUBILITY OF URANINITE IN GRANITIC MELTS AND FLUID SOLUTIONS AT HIGH PRESSURES AND TEMPERATURES

1987 ◽  
Vol 29 (8) ◽  
pp. 997-1004 ◽  
Author(s):  
V. A. Zharikov ◽  
I. P. Ivanov ◽  
B. I. Omel'yanenko ◽  
A. F. Red'kin ◽  
S. V. Yudintsev
Keyword(s):  
Experimental Study ◽  
High Pressures ◽  
High Pressures And Temperatures

Some observations of the effects of high pressures and temperatures on the stability of YBa2Cu3O7−x

1990 ◽  
Vol 67 (11) ◽  
pp. 6934-6939 ◽  
Author(s):  
R. K. Williams ◽  
K. B. Alexander ◽  
J. Brynestad ◽  
T. J. Henson ◽  
D. M. Kroeger ◽  
...  
Keyword(s):  
High Pressures ◽  
High Pressures And Temperatures ◽  
The Stability

Phase transitions of BaCO3 at high pressures

2008 ◽  
Vol 72 (2) ◽  
pp. 659-665 ◽  
Author(s):  
S. Ono ◽  
J. P. Brodholt ◽  
G. D. Price
Keyword(s):  
Phase Transition ◽  
Experimental Study ◽  
High Pressure ◽  
Phase Transitions ◽  
Bulk Modulus ◽  
First Principles ◽  
High Pressures ◽  
Ambient Conditions ◽  
The Stability ◽  
Previous Experimental Study

AbstractFirst-principles simulations and high-pressure experiments were used to study the stability of BaCO3 carbonates at high pressures. Witherite, which is orthorhombic and isotypic with CaCO3 aragonite, is stable at ambient conditions. As pressure increases, BaCO3 transforms from witherite to an orthorhombic post-aragonite structure at 8 GPa. The calculated bulk modulus of the post-aragonite structure is 60.7 GPa, which is slightly less than that from experiments. This structure shows an axial anisotropicc ompressibility and the a axis intersects with the c axis at 70 GPa, which implies that the pressure-induced phase transition reported in previous experimental study is misidentified. Although a pyroxene-like structure is stable in Mg- and Ca-carbonates at pressures >100 GPa, our simulations showed that this structure does not appear in BaCO3.

The stability of bcc-Fe at high pressures and temperatures with respect to tetragonal strain

2008 ◽  
Vol 170 (1-2) ◽  
pp. 52-59 ◽  
Author(s):  
Lidunka Vočadlo ◽  
Ian G. Wood ◽  
Michael J. Gillan ◽  
John Brodholt ◽  
David P. Dobson ◽  
...  
Keyword(s):  
High Pressures ◽  
High Pressures And Temperatures ◽  
The Stability
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