Abstract
The phase diagram of NH{sub 4}SCN was investigated by neutron powder diffraction and acoustic methods, in order to search for a possible triple point and to reveal possible peculiarities near 200 K, observed by other authors, by Raman light scattering. The transition from the monoclinic to the orthorhombic phase was determined on the p-T phase plane in the range of 193-323 K and up to 1.6 GPa by the acoustic method. The temperature dependences of the unit cell parameters and volume and of the transversal wave velocity reveal some anomalies in the monoclinic NH{sub 4}SCN phase near 200 K. It is possible that these observed anomalies are due to a freezing of the reorientation processes of NH{sub 4}{sup +} ions. 13 refs., 6 figs.
Smirnov, L S;
Natkaniec, I;
Bragin, S I;
Solov`ev, A I;
[1]
Brankowski, J;
[2]
Goncharova, V A;
Gromnitskaya, E L;
Il`ina, G G;
Stal`gorova, O V
[3]
- Joint Inst. for Nuclear Research, Dubna (Russian Federation). Lab. of Neutron Physics
- Institute of Nuclear Physics, Cracow (Poland)
- AN SSSR, Moscow (Russian Federation). Inst. Fiziki Vysokikh Davlenij
Citation Formats
Smirnov, L S, Natkaniec, I, Bragin, S I, Solov`ev, A I, Brankowski, J, Goncharova, V A, Gromnitskaya, E L, Il`ina, G G, and Stal`gorova, O V.
The Neutron Powder Diffraction and Acoustic Investigations of the NH{sub 4}SCN Phase Diagram.
JINR: N. p.,
1994.
Web.
Smirnov, L S, Natkaniec, I, Bragin, S I, Solov`ev, A I, Brankowski, J, Goncharova, V A, Gromnitskaya, E L, Il`ina, G G, & Stal`gorova, O V.
The Neutron Powder Diffraction and Acoustic Investigations of the NH{sub 4}SCN Phase Diagram.
JINR.
Smirnov, L S, Natkaniec, I, Bragin, S I, Solov`ev, A I, Brankowski, J, Goncharova, V A, Gromnitskaya, E L, Il`ina, G G, and Stal`gorova, O V.
1994.
"The Neutron Powder Diffraction and Acoustic Investigations of the NH{sub 4}SCN Phase Diagram."
JINR.
@misc{etde_10112962,
title = {The Neutron Powder Diffraction and Acoustic Investigations of the NH{sub 4}SCN Phase Diagram}
author = {Smirnov, L S, Natkaniec, I, Bragin, S I, Solov`ev, A I, Brankowski, J, Goncharova, V A, Gromnitskaya, E L, Il`ina, G G, and Stal`gorova, O V}
abstractNote = {The phase diagram of NH{sub 4}SCN was investigated by neutron powder diffraction and acoustic methods, in order to search for a possible triple point and to reveal possible peculiarities near 200 K, observed by other authors, by Raman light scattering. The transition from the monoclinic to the orthorhombic phase was determined on the p-T phase plane in the range of 193-323 K and up to 1.6 GPa by the acoustic method. The temperature dependences of the unit cell parameters and volume and of the transversal wave velocity reveal some anomalies in the monoclinic NH{sub 4}SCN phase near 200 K. It is possible that these observed anomalies are due to a freezing of the reorientation processes of NH{sub 4}{sup +} ions. 13 refs., 6 figs.}
place = {JINR}
year = {1994}
month = {Dec}
}
title = {The Neutron Powder Diffraction and Acoustic Investigations of the NH{sub 4}SCN Phase Diagram}
author = {Smirnov, L S, Natkaniec, I, Bragin, S I, Solov`ev, A I, Brankowski, J, Goncharova, V A, Gromnitskaya, E L, Il`ina, G G, and Stal`gorova, O V}
abstractNote = {The phase diagram of NH{sub 4}SCN was investigated by neutron powder diffraction and acoustic methods, in order to search for a possible triple point and to reveal possible peculiarities near 200 K, observed by other authors, by Raman light scattering. The transition from the monoclinic to the orthorhombic phase was determined on the p-T phase plane in the range of 193-323 K and up to 1.6 GPa by the acoustic method. The temperature dependences of the unit cell parameters and volume and of the transversal wave velocity reveal some anomalies in the monoclinic NH{sub 4}SCN phase near 200 K. It is possible that these observed anomalies are due to a freezing of the reorientation processes of NH{sub 4}{sup +} ions. 13 refs., 6 figs.}
place = {JINR}
year = {1994}
month = {Dec}
}