期刊
CHEMICAL PHYSICS LETTERS
卷 419, 期 4-6, 页码 496-500出版社
ELSEVIER
DOI: 10.1016/j.cplett.2005.11.123
关键词
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A Raman spectroscopy study has proven, that on increasing hydrostatic pressure up to similar to 3 GPa gamma-glycine undergoes a phase transition into delta-polymorph, which on decompression down to 0.62 GPa transforms into another form, supposed to be a previously unknown polymorph termed zeta-glycine. The formation of this new form was observed also visually using optical microscopy and is in an agreement with the data from X-ray powder diffraction. On further decompression, delta- and zeta-forms coexisted in the pressure range between 0 and 0.62 GPa. The zeta-form of glycine was preserved at ambient conditions for at least 3 days. (c) 2005 Elsevier B.V. All rights reserved.
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