Specific Heat of CoSe₂ and Mössbauer Effect of ⁵⁷Fe Doped in CoSe₂

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The specific heat and Mössbauer effect were measured of the metallic compound CoSe₂, which has been reported to be antiferromagnet. It is concluded that CoSe₂ is not an antiferromagnetic but a paramagnetic metal down to 4.2 K. The Debye temperature is 345 K and the coefficient of electronic contribution to specific heat γ is 11 mJ/K²-mole.