# calcium sulphide

**Formula:**CaS**Molecular weight:**72.143**IUPAC Standard InChI:**- InChI=1S/Ca.S
- Download the identifier in a file.

**IUPAC Standard InChIKey:**JGIATAMCQXIDNZ-UHFFFAOYSA-N**CAS Registry Number:**20548-54-3**Chemical structure:**

This structure is also available as a 2d Mol file**Other names:**Calcium sulfide-
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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.
**

Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|

_{f}H°_{gas} | 123.59 | kJ/mol | Review | Chase, 1998 | Data last reviewed in September, 1977 |

Quantity | Value | Units | Method | Reference | Comment |

S°_{gas,1 bar} | 232.59 | J/mol*K | Review | Chase, 1998 | Data last reviewed in September, 1977 |

### Gas Phase Heat Capacity (Shomate Equation)

C_{p}° = A + B*t + C*t^{2} + D*t^{3} +
E/t^{2}

H° − H°_{298.15}= A*t + B*t^{2}/2 +
C*t^{3}/3 + D*t^{4}/4 − E/t + F − H

S° = A*ln(t) + B*t + C*t^{2}/2 + D*t^{3}/3 −
E/(2*t^{2}) + 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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Temperature (K) | 298. - 1400. | 1400. - 3000. | 3000. - 6000. |
---|---|---|---|

A | 33.08887 | -247.8309 | 254.7052 |

B | 15.89464 | 258.9883 | -86.85356 |

C | -21.61998 | -74.23546 | 13.05132 |

D | 10.84635 | 6.965901 | -0.689578 |

E | -0.123820 | 106.5113 | -287.7881 |

F | 112.7768 | 395.8616 | -317.4526 |

G | 268.0601 | 104.5720 | 244.2067 |

H | 123.5949 | 123.5949 | 123.5949 |

Reference | Chase, 1998 | Chase, 1998 | Chase, 1998 |

Comment | Data last reviewed in September, 1977 | Data last reviewed in September, 1977 | Data last reviewed in September, 1977 |

## Condensed phase thermochemistry data

**Go To:** Top, Gas phase thermochemistry data, Constants of diatomic molecules, References, Notes

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

Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|

_{f}H°_{solid} | -473.21 | kJ/mol | Review | Chase, 1998 | Data last reviewed in September, 1977 |

Quantity | Value | Units | Method | Reference | Comment |

S°_{solid} | 56.54 | J/mol*K | Review | Chase, 1998 | Data last reviewed in September, 1977 |

### Solid Phase Heat Capacity (Shomate Equation)

C_{p}° = A + B*t + C*t^{2} + D*t^{3} +
E/t^{2}

H° − H°_{298.15}= A*t + B*t^{2}/2 +
C*t^{3}/3 + D*t^{4}/4 − E/t + F − H

S° = A*ln(t) + B*t + C*t^{2}/2 + D*t^{3}/3 −
E/(2*t^{2}) + 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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Temperature (K) | 298. - 3000. |
---|---|

A | 48.60260 |

B | 7.280161 |

C | -1.933724 |

D | 0.329739 |

E | -0.289224 |

F | -488.9966 |

G | 111.6450 |

H | -473.2104 |

Reference | Chase, 1998 |

Comment | Data last reviewed in September, 1977 |

## Constants of diatomic molecules

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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 by:** Klaus P. Huber and Gerhard H. Herzberg

Data collected through July, 1976

Symbol | Meaning |
---|---|

State | electronic state and / or symmetry symbol |

T_{e} | minimum electronic energy (cm^{-1}) |

ω_{e} | vibrational constant – first term (cm^{-1}) |

ω_{e}x_{e} | vibrational constant – second term (cm^{-1}) |

ω_{e}y_{e} | vibrational constant – third term (cm^{-1}) |

B_{e} | rotational constant in equilibrium position (cm^{-1}) |

α_{e} | rotational constant – first term (cm^{-1}) |

γ_{e} | rotation-vibration interaction constant (cm^{-1}) |

D_{e} | centrifugal distortion constant (cm^{-1}) |

β_{e} | rotational constant – first term, centrifugal force (cm^{-1}) |

r_{e} | internuclear distance (Å) |

Trans. | observed transition(s) corresponding to electronic state |

ν_{00} | position of 0-0 band (units noted in table) |

State | T_{e} | _{e} | _{e}x_{e} | _{e}y_{e} | B_{e} | _{e} | _{e} | D_{e} | _{e} | r_{e} | Trans. | _{00} |
---|---|---|---|---|---|---|---|---|---|---|---|---|

Continuous absorption from 41860 cm^{-1} to higher wavenumbers,
observed and ascribed to CaS by Mathur, 1937, but questioned by Blues and Barrow, 1969. | ||||||||||||

A ^{1}^{+} | 15220.79 | 409.04 Z | 0.818 | 0.16666 | 0.00060_{5} | 0.000000109 | 2.3864 | A X R | 15194.44 Z | |||

↳Blues and Barrow, 1969 | ||||||||||||

X ^{1}^{+} | 0 | 462.23 Z | 1.78 | 0.17667 | 0.00083_{7} | 0.000000102 | 2.3178 |

### Notes

1 | Thermochemical value (mass-spectrom.) Colin, Goldfinger, et al., 1964, corrected for a ^{1} ground state.
Good agreement with Marquart and Berkowitz, 1963. |

## References

**Go To:** Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Constants of diatomic molecules, Notes

**Chase, 1998**

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

**Mathur, 1937**

Mathur, L.S.,
*The absorption spectra of the monosulphides of alkaline earth elements and their latent heats of vaporization*,
**Proc. R. Soc. London A**, 1937, 162, 83. [all data]

**Blues and Barrow, 1969**

Blues, R.C.; Barrow, R.F.,
*Rotational analysis of bands of a system A ^{1}«SIGMA»^{+} - X^{1}«SIGMA»^{+} of gaseous CaS*,

**Trans. Faraday Soc.**, 1969, 65, 646. [all data]

**Colin, Goldfinger, et al., 1964**

Colin, R.; Goldfinger, P.; Jeunehomme, M.,
*Mass-spectrometric studies of vaporization of the sulphides of calcium, strontium and barium. The dissociation energy of S _{2} and SO*,

**Trans. Faraday Soc.**, 1964, 60, 306. [all data]

**Marquart and Berkowitz, 1963**

Marquart, J.R.; Berkowitz, J.,
*Dissociation energies of some metal sulfides*,
**J. Chem. Phys.**, 1963, 39, 283. [all data]

## Notes

**Go To:** Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Constants of diatomic molecules, References

- Symbols used in this document:

S° _{gas,1 bar}Entropy of gas at standard conditions (1 bar) S° _{solid}Entropy of solid at standard conditions _{f}H°_{gas}Enthalpy of formation of gas at standard conditions _{f}H°_{solid}Enthalpy of formation of solid at standard conditions - Data from NIST Standard Reference Database 69:
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