Raman and X-Ray Scattering Studies of High-Pressure Phases of Urea

• Published in: The journal of physical chemistry. B Vol. 109; no. 16; pp. 8206 - 8215
• Main Authors: Lamelas, F. J, Dreger, Z. A, Gupta, Y. M
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 28.04.2005
• Subjects: Pressure; Scattering, Radiation; Spectrum Analysis, Raman; Urea - chemistry; X-Rays

Single-crystal and polycrystalline urea samples were compressed to 12 GPa in a diamond-anvil cell. Raman-scattering measurements indicate a sequence of four structural phases occurring over this pressure range at room temperature. The transitions to the high-pressure phases take place at pressures n...