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The specific heat of α-FeOOH was measured in the temperature range 0.6 to 30 K by a combination of semi-adiabatic and isothermal techniques. A broad specific-heat anomaly was detected at approximately 1 K. The data above this anomaly were fitted to the equation C=BaswT3e−Δ/T+∑ BnTn, where ∑ BnTn represents the harmonic-lattice model for the lattice specific heat, and BaswT3e−Δ/T...
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