Kinetics and mechanism of transformations in iron-rich pyrrhotites and in troilite-pyrrhotite metastable assemblages

Autor:	V. I. Popov, G. V. Novikov, V. K. Egorov, L. V. Sipavina
Rok vydání:	1977
Předmět:	Chemistry Kinetics Thermodynamics engineering.material Decomposition Troilite Thermodynamic model Condensed Matter::Materials Science Crystallography Geochemistry and Petrology Metastability Mössbauer spectroscopy engineering General Materials Science Pyrrhotite Powder diffraction
Zdroj:	Physics and Chemistry of Minerals. 1:1-14
ISSN:	1432-2021 0342-1791
Popis:	Iron-rich pyrrhotites proved to be metastable and to decompose at 70–140° C to troilite and pyrrhotite with less iron content as shown by nuclear gamma-resonance (Mossbauer) studies at high temperatures. Coherence of decomposition product lattices was established by studying powder samples textured in a magnetic field. Detailed X-ray powder diffraction and Mossbauer investigations revealed two different mechanisms of transformation in metastable associations. Kinetic phenomena are discussed in terms of a thermodynamic model of two-phase assemblage.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::dd2c1e7557c4bbad0cc4029162773aa0 https://doi.org/10.1007/bf00307975 Zobrazit plný text záznamu