Issue Date: January 9, 2012
Another Form Of Oxygen
At pressures of nearly 2 terapascals (TPa), molecular oxygen forms a spiral-chain O4 structure with unusual properties, a computational study predicts (Proc. Natl. Acad. Sci. USA, DOI: 10.1073/pnas.1119375109).
Yanming Ma of Jilin University, in Changchun, China; Ho-kwang Mao of the Carnegie Institution of Washington; and coworkers used a computational method known as CALYPSO (crystal structure analysis by particle-swarm optimization) to search . . .
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