Allotropic transformation of Se8 to Sen

Single crystals of cycloocta -Se, unambiguously characterized by XRD were prepared and used in a study of its allotropic transformation to polycatena -Se by DSC supported by Raman spectroscopy and optical microscopy. It was found that the transformation of a Se 8 single crystal to polycrystalline Se...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2011-02, Vol.103 (2), p.429-433
Main Authors: CERNOSEK, Zdeněk, HOLUBOVA, Jana, CERNOSKOVA, Eva
Format: Article
Language:English
Subjects:
Allotropic transformation
Analytical Chemistry
Chemistry
Chemistry and Materials Science
Condensed matter: structure, mechanical and thermal properties
Differential scanning calorimetry
Equations of state, phase equilibria, and phase transitions
Exact sciences and technology
Inorganic Chemistry
Measurement Science and Instrumentation
Melting
Optical microscopy
Physical Chemistry
Physics
Polymer Sciences
Proposals
Raman spectroscopy
Single crystals
Solid-solid transitions
Specific phase transitions
Transformations
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Description
Summary:Single crystals of cycloocta -Se, unambiguously characterized by XRD were prepared and used in a study of its allotropic transformation to polycatena -Se by DSC supported by Raman spectroscopy and optical microscopy. It was found that the transformation of a Se 8 single crystal to polycrystalline Se n proceeds progressively within the volume of the monoclinic single crystal without shape change. All the results of DSC, Raman spectroscopy, and optical microscopy indicate that previous proposals on cycloocta -Se melting during transformation are not realistic.
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-010-0844-3