Thermodynamics of the ytterbium-lead system by simultaneous weight-loss-mass-spectrometry Knudsen effusion

Journal Article · Thu Sep 16 04:00:00 EDT 1982 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100216a030· OSTI ID:6453696

Schiffman, R A

The ytterbium-lead system was investigated in the temperature range 750 to 1381 K by measurements of vapor pressures with a simultaneous weight-loss-mass-spectrometric (WLMS) Knudsen effusion technique. A congruently vaporizing phase was located at YbPb/sub 1/ /sub 04/. The nonstoichiometric composition ranges of the intermetallic compounds were determined, and a Yb-Pb phase diagram was constructed. The heats of formation at 298 K calculated from the thermodynamic measurements were as follows(kJ/mol): Yb/sub 2/Pb, -174.6; Yb/sub 5/Pb/sub 3/, -461.6; YbPb, -116.9; YbPb/sub 3/, -152.4. 15 figures.

• Research Organization: Ames Lab., IA
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 6453696
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 86:19; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
360104 -- Metals & Alloys-- Physical Properties
ALLOYS
DATA
DIAGRAMS
ELEMENTS
ENTHALPY
EVAPORATION
EXPERIMENTAL DATA
FLUID FLOW
FORMATION HEAT
GAS FLOW
HIGH TEMPERATURE
INFORMATION
INTERMETALLIC COMPOUNDS
KNUDSEN FLOW
LEAD
LEAD ALLOYS
MASS SPECTRA
MEDIUM TEMPERATURE
METALS
NUMERICAL DATA
PHASE DIAGRAMS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
RARE EARTHS
REACTION HEAT
SAMPLE PREPARATION
SPECTRA
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
VAPOR PRESSURE
VERY HIGH TEMPERATURE
YTTERBIUM
YTTERBIUM ALLOYS