Monolayers of CF/sub 4/ adsorbed on graphite, studied by synchrotron x-ray diffraction

Journal Article · Mon Nov 01 04:00:00 EST 1982 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.26.5168· OSTI ID:6630774

Kjaer, K; Nielsen, M; Bohr, J; Lauter, H J; McTague, J P

With synchrotron x-ray diffraction we have measured the phase diagram of CF/sub 4/ monolayers adsorbed on the graphite substrate UCAR-ZYX. We have found four two-dimensional crystalline phases including the 2 x 2 commensurate structure. Between this and the denser incommensurate hexagonal phase we find an axially compressed phase interpreted to be the stripe domain structure. Our data indicate that the order-disorder transition (melting) of the 2 x 2 commensurate phase as well as melting of the stripe and of the hexagonal incommensurate phases are continuous.

• Research Organization: Riso National Laboratory, DK-4000 Roskilde, Denmark
• OSTI ID: 6630774
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 26:9; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
ADSORPTION
BREMSSTRAHLUNG
CARBON
CARBON TETRAFLUORIDE
COHERENT SCATTERING
CRYSTAL MODELS
CRYSTAL STRUCTURE
DATA
DIAGRAMS
DIFFRACTION
DOMAIN STRUCTURE
ELECTROMAGNETIC RADIATION
ELEMENTAL MINERALS
ELEMENTS
EXPERIMENTAL DATA
FILMS
FLUORINATED ALIPHATIC HYDROCARBONS
GRAPHITE
HALOGENATED ALIPHATIC HYDROCARBONS
HEISENBERG MODEL
INFORMATION
ISING MODEL
LENNARD-JONES POTENTIAL
LOW TEMPERATURE
MATHEMATICAL MODELS
MINERALS
NONMETALS
NUMERICAL DATA
ORDER-DISORDER TRANSFORMATIONS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PHASE DIAGRAMS
PHASE TRANSFORMATIONS
POTENTIALS
RADIATIONS
SCATTERING
SORPTION
SORPTIVE PROPERTIES
SUBSTRATES
SURFACE PROPERTIES
SYNCHROTRON RADIATION
X-RAY DIFFRACTION