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Chemical Stability of Binary Coulomb Compounds
Author(s) -
Igarashi T.,
Nakao N.,
Iyetomi H.
Publication year - 2001
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/1521-3986(200107)41:4<319::aid-ctpp319>3.0.co;2-j
Subject(s) - coulomb , ionic bonding , chemical stability , binary number , mixing (physics) , chemical physics , materials science , ion , chemical composition , range (aeronautics) , stability (learning theory) , thermodynamics , chemistry , physics , organic chemistry , quantum mechanics , arithmetic , mathematics , machine learning , computer science , electron , composite material
Chemical stability of binary Coulomb compounds is studied through extensive calculation of their Madelung energies. A remarkable finding is that the compounds with disordered ionic arrangements in a certain range of the composition are stable against chemical separation beyond the charge ratio around 6; clearly the entropic effect due to finite temperature promotes the mixing of ions of different species. For the ordered AB 3 ‐type compounds, there exists a crystalline structure which is more chemically bounded than that of Dyson (1971). Relative stability o the ordered and disordered compounds is also discussed.