Twenty-five years ago I went to a seminar with this intriguing title. The photographs of a deep blue substance trapped in a diamond vise were stunning, particularly in a time when black and white slides dominated the colloquium scene. Things get even more colorful if you explore the phase diagram of oxygen at higher pressures and temperatures (beyond 650 K and 16.7 GPa). A recent paper in Physical Review Letters (PRL 93, 265710, [2004], "New Phase Diagram of Oxygen at High Pressures and Temperatures", M. Santoro, E. Gregoryanz, Ho. Mao, and R. J. Hemley) revealed new solid forms of oxygen. The ε solid phase is a red crystalline form.
What's a GPa? A gigapascal...or about 10,000 atmospheres.
Read early entrys about phase diagrams and literature.
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in The Biology Files

The Who, What, When, Where and Why of Chemistry
Chemistry is not a world unto itself. It is woven firmly into the fabric of the rest of the world, and various fields, from literature to archeology, thread their way through the chemist's text.
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