Raman spectra and phase diagram of fluorine at pressures up to 6 GPa and temperatures between 10 and 320 K

Journal Article · Tue Sep 01 04:00:00 EDT 1987 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.453700· OSTI ID:6417063

Schiferl, D; Kinkead, S; Hanson, R C; Pinnick, D A

The Raman spectra and phase diagram of fluorine were studied in a diamond-anvil cell up to 6 GPa over the temperature range 10--300 K. The sample slowly reacted with the diamond anvils to form CF/sub 4/. The vibron frequencies in ..cap alpha..-F/sub 2/ and ..beta..-F/sub 2/, as well as the lattice modes in ..cap alpha..-F/sub 2/, were determined as a function of pressure. No new phases were discovered. The ..cap alpha..--..beta.. phase boundary can be fit with an equation of the Simon form: P/sub ..cap alpha..//sub ..beta../ (GPa) = -0.385(10) +4.80(9) x 10/sup -4/ T/sub ..cap alpha..//sub ..beta..//sup 1.75/ (K). The melting curve was established to lie between limiting curves: P/sup upper//sub melt/ (GPa) = -0.107+1.01 x 10/sup -4/T/sup 1.75//sub melt/ (K) and P/sup lower//sub melt/ (GPa) = -0.140+1.32 x 10/sup -4/ T/sup 1.75//sub melt/ (K).

• Research Organization: Los Alamos National Laboratory, Los Alamos, New Mexico 87545
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6417063
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 87:5; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
DIAGRAMS
ELEMENTS
FLUORINE
HALOGENS
HIGH PRESSURE
LATTICE VIBRATIONS
LOW TEMPERATURE
MEDIUM TEMPERATURE
NONMETALS
PHASE DIAGRAMS
PRESSURE EFFECTS
RAMAN SPECTRA
SPECTRA
VERY LOW TEMPERATURE