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Structural stability and equation of state of thorium carbide for pressures up to 36 GPa
Author(s) -
Gerward L.,
Staun Olsen J.,
Benedict U.,
Itíe J.P.,
Spirlet J. C.
Publication year - 1986
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889886089318
Subject(s) - carbide , equation of state , bulk modulus , thorium , actinide , nitride , high pressure , materials science , chemistry , structural stability , diffraction , phase (matter) , powder diffraction , thermodynamics , derivative (finance) , crystallography , metallurgy , uranium , composite material , nuclear chemistry , physics , economics , financial economics , structural engineering , engineering , optics , layer (electronics) , organic chemistry
High‐pressure X‐ray diffraction studies have been performed on ThC powder up to 36 GPa. No structural phase transformation has been observed, the rock‐salt structure of ThC being stable over the whole pressure range. The equation of state can be described by the Murnaghan equation with the bulk modulus B 0 = 109(7) GPa and its pressure derivative B ′ 0 = 3.1(6). The high‐pressure behaviour of ThC is compared with that of other actinide carbides and nitrides and correlated with the occupation of the 5 f electron shell.