Krypton

• Formula: Kr
• Molecular weight: 83.798
• IUPAC Standard InChI: InChI=1S/Kr Copy

  
• IUPAC Standard InChIKey: DNNSSWSSYDEUBZ-UHFFFAOYSA-N Copy
• CAS Registry Number: 7439-90-9
• Chemical structure:
  This structure is also available as a 2d Mol file
• Other names: Kr; UN 1056; UN 1970
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• Information on this page:
  • Gas phase thermochemistry data
  • Phase change data
  • Mass spectrum (electron ionization)
  • References
  • Notes
• Other data available:
  • Reaction thermochemistry data
  • Henry's Law data
  • Gas phase ion energetics data
  • Ion clustering data
  • Fluid Properties
• Data at other public NIST sites:
  • NIST Atomic Spectra Database - Lines Holdings (on physics web site)
  • NIST Atomic Spectra Database - Levels Holdings (on physics web site)
  • NIST Atomic Spectra Database - Ground states and ionization energies (on physics web site)
  • Gas Phase Kinetics Database
  • X-ray Photoelectron Spectroscopy Database, version 5.0
  • X-ray Photoelectron Spectroscopy Database, version 5.0
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Gas phase thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Gas Phase Heat Capacity (Shomate Equation)

C_p° = A + B*t + C*t² + D*t³ + E/t²
H° − H°_298.15= A*t + B*t²/2 + C*t³/3 + D*t⁴/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t²/2 + D*t³/3 − E/(2*t²) + G
    C_p = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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Phase change data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director

Antoine Equation Parameters

log₁₀(P) = A − (B / (T + C))
    P = vapor pressure (bar)
    T = temperature (K)

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Mass spectrum (electron ionization)

Go To: Top, Gas phase thermochemistry data, Phase change data, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

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Additional Data

References

Go To: Top, Gas phase thermochemistry data, Phase change data, Mass spectrum (electron ionization), Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Cox, Wagman, et al., 1984
Cox, J.D.; Wagman, D.D.; Medvedev, V.A., CODATA Key Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1. [all data]

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Ziegler, Yarbrough, et al., 1964
Ziegler, W.T.; Yarbrough, D.W.; Mullins, J.C., Calculation of the Vapor Pressure and Heats of Vaporization and Sublimation of Liquids and Solids below One Atmosphere Pressure. VI. Krypton, Ga. Inst. Technol., Eng. Exp. Stn., Proj. A-764, Tech. Rep. No. 1, 1964. [all data]

Lahr and Eversole, 1962
Lahr, P.H.; Eversole, W.G., Compression Isotherms of Argon, Krypton, and Xenon Through the Freezing Zone, J. Chem. Eng. Data, 1962, 7, 42-47. [all data]

Clusius and Weigand, 1940
Clusius, K.; Weigand, K., Melting Curves of the Gases A, Kr, Xe, CH4, CH3D, CD4, C2H4, C2H6, COS, and PH3 to 200 Atmospheres Pressure. The Chane of Volume on Melting, Z. Phys. Chem., Abt. B, 1940, 46, 1-37. [all data]

Theeuwes and Bearman, 1970
Theeuwes, F.; Bearman, R.J., The p,V,T behaviour of dense fluids III. The vapor pressure and orthobaric densities of krypton, J. Chem. Thermodyn., 1970, 2, 179-85. [all data]

Theeuwes and Bearman, 1970, 2
Theeuwes, F.; Bearman, R.J., The p,V,T Behavior of Dense Fluids. III. The Vapor Pressure and Orthobaric Density of Krypton, J. Chem. Thermodyn., 1970, 2, 2, 179-185, https://doi.org/10.1016/0021-9614(70)90081-9 . [all data]

Notes

Go To: Top, Gas phase thermochemistry data, Phase change data, Mass spectrum (electron ionization), References

• Symbols used in this document:
  

  Pc	Critical pressure
  Ptriple	Triple point pressure
  S°gas,1 bar	Entropy of gas at standard conditions (1 bar)
  Tboil	Boiling point
  Tc	Critical temperature
  Ttriple	Triple point temperature
  ρc	Critical density

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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