X-Ray and Neutron Powder Diffraction Study of The Rb<sub><b>2-<i><i>x</i></i></b></sub>(NH<sub><b>4</b></sub>)<sub><i><i>x</i></i></sub>SO<sub><b>4</b></sub>System

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  • Mestres Lourdes
    Departament de Química Inorgànica, Universitat de Barcelona, Diagonal 647 08028–Barcelona, Spain
  • Martinez–Sarrion Maria Luisa
    Departament de Química Inorgànica, Universitat de Barcelona, Diagonal 647 08028–Barcelona, Spain
  • Morales Manuel
    Departament de Química Inorgànica, Universitat de Barcelona, Diagonal 647 08028–Barcelona, Spain
  • Beskrovnyi Anatoly I.
    Frank Laboratory Neutron Physics Joint Institute Nuclear Research, 141980 Dubna, Moscow region, Russia
  • Natkaniec Ireneusz
    Frank Laboratory Neutron Physics Joint Institute Nuclear Research, 141980 Dubna, Moscow region, Russia On leave from H. Niewodniczanski Institute of Nuclear Physics, 31–342 Krakow, Poland
  • Shelkova Inna G.
    Frank Laboratory Neutron Physics Joint Institute Nuclear Research, 141980 Dubna, Moscow region, Russia
  • Smirnov Lev S.
    Frank Laboratory Neutron Physics Joint Institute Nuclear Research, 141980 Dubna, Moscow region, Russia
  • Shuvalov Lev A.
    Institute of Crystallography RAS, 117333 Moscow, Russia

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タイトル別名
  • X-Ray and Neutron Powder Diffraction Study of The Rb2-x(NH4)xSO4 System.
  • X-Ray and Neutron Powder Diffraction St

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X-ray and neutron powder diffraction studies of Rb2-x(NH4)xSO4 solid solutions throughout the concentration range 0≤ x≤ 2 and in the temperature range from 10 up to 300, K have been carried out. From the concentration dependencies of the lattice parameters obtained for protonated and deuterated samples, the tricritical point have been determined near the concentration x=1.6. The β -γ phase transition is of the first order for compounds with x>1.6 and of the second order for x<1.6.

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