Photopolymerization of Carbon Disulfide Yields the High-Pressure-Phase (CS2)x

1995 ◽  
Vol 117 (45) ◽  
pp. 11270-11277 ◽  
Author(s):  
Jonah J. Colman ◽  
William C. Trogler
Keyword(s):  
High Pressure ◽  
Carbon Disulfide ◽  
High Pressure Phase ◽  
Pressure Phase

High Pressure Phase Behavior of Carbon Dioxide in Carbon Disulfide and Carbon Tetrachloride

2011 ◽  
Vol 56 (6) ◽  
pp. 2786-2792 ◽  
Author(s):  
Pedro J. Carvalho ◽  
Ana Rute Ferreira ◽  
Mariana B. Oliveira ◽  
Marcel Besnard ◽  
M. Isabel Cabaço ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
High Pressure ◽  
Carbon Tetrachloride ◽  
Phase Behavior ◽  
Carbon Disulfide ◽  
High Pressure Phase ◽  
High Pressure Phase Behavior ◽  
Pressure Phase

scholarly journals Compressibility and Phase Stability of Iron-Rich Ankerite

Minerals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 607
Author(s):  
Raquel Chuliá-Jordán ◽  
David Santamaria-Perez ◽  
Javier Ruiz-Fuertes ◽  
Alberto Otero-de-la-Roza ◽  
Catalin Popescu
Keyword(s):  
High Pressure ◽  
Density Functional ◽  
Computational Study ◽  
Density Functional Theory Calculations ◽  
High Pressure Phase ◽  
Stable Phase ◽  
Pressure Derivative ◽  
Reversible Phase Transition ◽  
Murnaghan Equation ◽  
Pressure Phase

The structure of the naturally occurring, iron-rich mineral Ca1.08(6)Mg0.24(2)Fe0.64(4)Mn0.04(1)(CO3)2 ankerite was studied in a joint experimental and computational study. Synchrotron X-ray powder diffraction measurements up to 20 GPa were complemented by density functional theory calculations. The rhombohedral ankerite structure is stable under compression up to 12 GPa. A third-order Birch–Murnaghan equation of state yields V0 = 328.2(3) Å3, bulk modulus B0 = 89(4) GPa, and its first-pressure derivative B’0 = 5.3(8)—values which are in good agreement with those obtained in our calculations for an ideal CaFe(CO3)2 ankerite composition. At 12 GPa, the iron-rich ankerite structure undergoes a reversible phase transition that could be a consequence of increasingly non-hydrostatic conditions above 10 GPa. The high-pressure phase could not be characterized. DFT calculations were used to explore the relative stability of several potential high-pressure phases (dolomite-II-, dolomite-III- and dolomite-V-type structures), and suggest that the dolomite-V phase is the thermodynamically stable phase above 5 GPa. A novel high-pressure polymorph more stable than the dolomite-III-type phase for ideal CaFe(CO3)2 ankerite was also proposed. This high-pressure phase consists of Fe and Ca atoms in sevenfold and ninefold coordination, respectively, while carbonate groups remain in a trigonal planar configuration. This phase could be a candidate structure for dense carbonates in other compositional systems.

ChemInform Abstract: The High-Pressure Phase of MgB2C2.

ChemInform ◽  
2011 ◽  
Vol 42 (8) ◽  
pp. no-no
Author(s):  
Michael Woerle ◽  
Urs Fischbach ◽  
Daniel Widmer ◽  
Frank Krumeich ◽  
Reinhard Nesper ◽  
...  
Keyword(s):  
High Pressure ◽  
High Pressure Phase ◽  
Pressure Phase

High-pressure phase transitions in AlSb

2001 ◽  
Vol 62 (5) ◽  
pp. 941-949 ◽  
Author(s):  
H. Hirano ◽  
S. Uehara ◽  
A. Mori ◽  
A. Onodera ◽  
K. Takemura ◽  
...  
Keyword(s):  
High Pressure ◽  
Phase Transitions ◽  
High Pressure Phase ◽  
Pressure Phase
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