Premium
X‐ray diffraction study of MgCl 2 aqueous solutions
Author(s) -
Caminiti R.,
Licheri G.,
Piccaluga G.,
Pinna G.
Publication year - 1979
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/s0021889879011729
Subject(s) - aqueous solution , diffraction , octahedron , ion , chemistry , crystallography , coordination number , molecule , ionic bonding , ionic radius , x ray crystallography , inorganic chemistry , crystal structure , physics , optics , organic chemistry
X‐ray diffraction data for three aqueous solutions of MgCl 2 were analyzed. It is shown that in a very concentrated solution the structure and correlation functions can be reproduced almost completely by using a nearest‐neighbor model of ionic hydration, whereas in the more dilute solutions a certain number of interactions between the hydrated cation and external water molecules must also be considered. The mean coordination geometry for the close hydration was found to be octahedral both for cation and anion with mean cation–water distances (2.10–2.12 Å) and mean anion–water distances (3.11–3.14 Å) in accordance with results found in other cases.