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Updated: Jul 19, 2026
06:26
Achieving Moderate Pressures in Sealed Vessels Using Dry Ice As a Solid CO2 Source
Published on: August 17, 2018
High pressure solid state chemistry of carbon dioxide
1European Laboratory for Non-linear Spectroscopy and INFM, Via N. Carrara 1, I-50019 Sesto Fiorentino, Florence, Italy. santoro@lens.unifi.it
Chemical Society Reviews
|September 28, 2006
Summary
This review covers three decades of high pressure research on solid carbon dioxide (CO2). It highlights the new covalent phase V and its glassy form, crucial for understanding CO2
Area of Science:
- Solid-state chemistry
- Condensed matter physics
- High-pressure science
Background:
- Extensive research over 30 years has explored solid carbon dioxide (CO2) under high pressure.
- Understanding the behavior of CO2 at extreme conditions is vital for various scientific fields.
- Previous studies focused on molecular phases, but recent discoveries necessitate a re-evaluation.
Purpose of the Study:
- To review experimental and theoretical studies on solid CO2 chemistry under high pressure (0-80 GPa, 40-3000 K).
- To emphasize the recently discovered non-molecular covalent crystalline phase V and its glassy counterpart, alpha-CO2.
- To clarify the reaction pathways leading to non-molecular CO2 and identify open research questions.
Main Methods:
- Review of experimental data from high-pressure studies.
- Analysis of theoretical calculations and simulations.
- Comparison of different solid CO2 phases (molecular and non-molecular).
Main Results:
- Detailed examination of molecular phases and their role in CO2 transformation.
- Focus on the newly identified non-molecular covalent crystalline phase V.
- Discussion of the glassy form of CO2 (alpha-CO2) and its properties.
- Identification of ongoing debates regarding the reaction mechanism for forming phase V.
Conclusions:
- The formation mechanism of CO2 phase V remains a significant open question.
- Further research is needed to fully understand the high-pressure behavior of CO2.
- Future studies should explore extended pressure-temperature (P-T) ranges to uncover new phases and reactions.
- This review serves as a tutorial for researchers in solid-state chemistry and condensed matter physics.
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