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In‐situ Study of the Solid‐Gas Reaction of BiCl 3 to BiOCl via the Intermediate Hydrate BiCl 3 ·H 2 O
Author(s) -
Wosylus Aron,
Hoffmann Stefan,
Schmidt Marcus,
Ruck Michael
Publication year - 2010
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201000032
Subject(s) - chemistry , monoclinic crystal system , hydrate , crystallography , x ray crystallography , crystal structure , hydrolysis , inorganic chemistry , clathrate hydrate , bismuth , powder diffraction , diffraction , organic chemistry , physics , optics
At ambient conditions the hydrolysis of BiCl 3 to BiOCl proceeds via the intermediate hydrate BiCl 3 · H 2 O as has been revealed by time dependent in‐situ X‐ray powder diffraction as well as time and temperature controlled TG‐MS experiments. Below 50 °C the topochemical formation of thehydrate can be reversed by reducing the H 2 O vapour pressure. Above this temperature the hydrate is unstable and the mechanism of the hydrolysis changes. BiCl 3 · H 2 O crystallizes in the monoclinic space group C 2/ m with lattice parameters a = 1114.25(1) pm, b = 876.82(1) pm, c = 584.20(1) pm, and β = 106.64(1)°.