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In situ X‐ray observation of iron using Kawai‐type apparatus equipped with sintered diamond: Absence of β phase up to 44 GPa and 2100 K
Author(s) -
Kubo Atsushi,
Ito Eiji,
Katsura Tomoo,
Shinmei Toru,
Yamada Hitoshi,
Nishikawa Osamu,
Song Maoshuang,
Funakoshi Kenichi
Publication year - 2003
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2002gl016394
Subject(s) - diamond , phase (matter) , in situ , materials science , phase boundary , stability (learning theory) , phase transition , diamond anvil cell , analytical chemistry (journal) , mineralogy , thermodynamics , crystallography , chemistry , metallurgy , physics , computer science , chromatography , machine learning , organic chemistry , high pressure
Stability relations of iron have been studied by means of in situ X‐ray observations using an eight cubic anvil system (Kawai‐type apparatus) equipped with sintered diamond (SD), in order to explore the stability of β‐iron. By observing the forward and reverse transitions, it has been confirmed that ε‐iron directly transforms into γ phase up to ca. 44 GPa and 2100 K, excluding the stability of β phase. The constrained ε‐γ phase boundary is expressed by the equation T (K) = 25 × P (GPa) + 540.