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RAMAN FREQUENCIES CALCULATED FROM THE VOLUME DATA AS A FUNCTION OF TEMPERATURE AT HIGH PRESSURES FOR THE DISORDERED PHASE II OF NH4I
Date
2011-02-10
Author
Yurtseven, Hasan Hamit
Kavruk, D.
Metadata
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This work is licensed under a
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In this study, we calculate the Raman frequencies as a function of temperature for the fixed pressures of 706, 1080 and 6355 bars using the volume data for phase 11 of ammonium iodide. The Raman frequencies calculated here are for the translational optic nu(5) TOM (125 cm(-1)) lattice mode that is located at the zone boundary (M point) of the Brillouin zone of phase II for NH4I. For this calculation the volume data obtained at zero pressure, is used through the mode Gruneisen parameter for the disordered phase II (13 phase) which has the CsCI structure of NH4I.
Subject Keywords
Statistical and Nonlinear Physics
,
Condensed Matter Physics
URI
https://hdl.handle.net/11511/35691
Journal
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
DOI
https://doi.org/10.1142/s0217979211058146
Collections
Department of Physics, Article