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Optical, x-ray and DSC measurements on N(CH3)4HSO4

Speziali, N. L.
Berger, H.
Arend, H.
Published in Ferroelectrics. 1990, vol. 105, p. 183-188
Abstract X-ray diffraction measurements on single crystals of N(CH3)4HSO4 have shown the following sequence of phases: orthorhombic, normal .tautm. Ti = 235K .tautm. orthorhombic, incommensurate .tautm. Tc = 202K .tautm. monoclinic, commensurate. DSC and birefringence measurements show a second order phase transition at Ti and a first order one at Tc.
Keywords Birefringence (in tetramethylammonium acid sulfate crystals)
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RIVERA, Jean-Pierre et al. Optical, x-ray and DSC measurements on N(CH3)4HSO4. In: Ferroelectrics, 1990, vol. 105, p. 183-188. https://archive-ouverte.unige.ch/unige:32595

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