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Section: 4 | Vapor Pressure of the Metallic Elements - Equations |
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The table 'Vapor Pressure of Metallic Elements: Equation Coefficients' has one or more different columns to those in the book version.
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The recommended form of citation is:
John R. Rumble, ed., CRC Handbook of Chemistry and Physics, 103rd Edition (Internet Version 2022), CRC Press/Taylor & Francis, Boca Raton, FL.
If a specific table is cited, use the format: "Physical Constants of Organic Compounds," in CRC Handbook of Chemistry and Physics, 103rd Edition (Internet Version 2022), John R. Rumble, ed., CRC Press/Taylor & Francis, Boca Raton, FL.

VAPOR PRESSURE OF THE METALLIC ELEMENTS - EQUATIONS

C. B. Alcock

This table gives coefficients in an equation for the vapor pressure of 65 metallic elements in both the solid and liquid states. Vapor pressures in the range 10-10 to 102 Pa (10-15 to 10-3 atm) are covered. The equation is:

for p in atmospheres: log(p/atm) = A + BT -1 + ClogT + DT -3
for p in pascals: log(p/Pa) = 5.006 + A + BT -1 + ClogT + DT -3
for p in torr (mmHg): log(p/torr) = 2.881 + A + BT -1 + ClogT + DT -3

where T is the temperature in K. This equation reproduces the observed vapor pressures to an accuracy of 5% or better. The table in “Vapor Pressure of the Metallic Elements — Data” in this section gives values of the vapor pressure at several temperatures in the 400 K to 2400 K range, as calculated from these equations.

Column definitions for the table are as follows.

Column heading Definition
Name Name of element; the metallic elements are listed alphabetically by name
Symbol Atomic symbol of element
Phase Phase for which the vapor pressure equation applies
A Numerical constant in vapor pressure equations above
B Coefficient of T-1 term in vapor pressure equations above
C Coefficient of logT term in vapor pressure equations above
D Coefficient of T-3 term in vapor pressure equations above
Temp. range Temperature range of applicability of vapor pressure equations, in K
tmp Melting point of solid phase, in K

The equations and coefficients are reprinted with permission of Pergamon Press.

Reference

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Vapor Pressure of Metallic Elements: Equation Coefficients



NameSymbolCAS Reg. No.PhaseABCDTemp. range/Ktmp/K
Continued on next page...
AluminumAl7429-90-5solid9.459-17342-0.7927298-mp933
AluminumAl7429-90-5liquid5.911-16211mp-1800933
AmericiumAm7440-35-9solid11.311-15059-1.3449298-mp1449
BariumBa7440-39-3solid12.405-9690-2.2890298-mp1000
BariumBa7440-39-3liquid4.007-8163mp-12001000
BerylliumBe7440-41-7solid8.042-17020-0.4440298-mp1560
BerylliumBe7440-41-7liquid5.786-15731mp-18001560
CadmiumCd7440-43-9solid5.939-5799298-mp594
CadmiumCd7440-43-9liquid5.242-5392mp-650594
CalciumCa7440-70-2solid10.127-9517-1.4030298-mp1115
CeriumCe7440-45-1solid6.139-21752298-mp1072
CeriumCe7440-45-1liquid5.611-21200mp-24501072
CesiumCs7440-46-2solid4.711-3999298-mp302
CesiumCs7440-46-2liquid4.165-3830mp-550302
ChromiumCr7440-47-3solid6.800-207330.4391-0.4094298-20002180
CobaltCo7440-48-4solid10.976-22576-1.0280298-mp1768
CobaltCo7440-48-4liquid6.488-20578mp-21501768
CopperCu7440-50-8solid9.123-17748-0.7317298-mp1358
CopperCu7440-50-8liquid5.849-16415mp-18501358


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