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1.


    Flerov, I. N.
    Heat capacity and phase transitions in NH4LiSO4, Cs-x(NH4)(1-x) LiSO4, and RbLiSO4 / I. N. Flerov, A. V. Kartashev, V. A. Grankina // Phys. Solid State. - 2005. - Vol. 47, Is. 4. - P. 720-728, DOI 10.1134/1.1913987. - Cited References: 29 . - ISSN 1063-7834
РУБ Physics, Condensed Matter
Рубрики:
ROOM-TEMPERATURE
   MONTE-CARLO

   LINH4SO4

   SUBSTITUTION

   CRYSTALS

   SULFATE

   CSLISO4

Аннотация: The heat capacity of NH4LiSO4, RbLiSO4, and Cs-x(NH4)(1 - x) LiSO4 crystals and its behavior over a broad temperature range including the phase transition regions were studied. The entropy changes corresponding to structural transformations in these crystals were found not to be characteristic of straightforward ordering of structural blocks. The results obtained are discussed in terms of phenomenological theory and model concepts. (C) 2005 Pleiades Publishing, Inc.

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Держатели документа:
Russian Acad Sci, Siberian Div, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Kartashev, A. V.; Карташев, Андрей Васильевич; Grankina, V. A.; Флёров, Игорь Николаевич
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2.


    Mel'nikova, S. V.
    Specific features of the ferroelastic phase transition in CsLiS1-zCrzO4 solid solutions / S. V. Mel'nikova, V. N. Voronov // Phys. Solid State. - 2006. - Vol. 48, Is. 9. - P. 1786-1790, DOI 10.1134/S1063783406090290. - Cited References: 11 . - ISSN 1063-7834
РУБ Physics, Condensed Matter
Рубрики:
CSLICRO4 CRYSTAL
   X-RAY

   CSLISO4

Аннотация: Single crystals of the CsLiS1-zCrzO4 solid solutions (z = 0, 0. 1, 0.4, 0.5, 0.9, 1.0) are grown, optical polarization studies are performed, and the birefringence and the angle of rotation of the optical indicatrix phi(T) are measured. A (z-T) phase diagram is constructed in the temperature range from 77 to similar to 550 K. It is established that substitution of chromium for sulfur has practically no effect on the shape of the optical indicatrix in the initial phase with Pmcn symmetry but produces strong distortions in the monoclinic phase with P112(1)/n symmetry. The unusual shape of the curve phi(T) for compositions with z approximate to 1 is accounted for by the interaction of the polarization-constant tensor components a(ij). No radical differences in the patterns of the ferroelastic phase transition between CsLiSO4 and CsLiCrO4 are revealed (the critical exponent for the transition parameter is beta = 0.33 +/- 0.01). These crystals differ only in the magnitudes of the anomalies, which is associated with the large difference between the ionic radii of sulfur and chromium.

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Voronov, V. N.; Воронов, Владимир Николаевич; Мельникова, Светлана Владимировна
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