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Formation and Crystallization of Fe(III) Hydroxides. Influence of precipitation temperature and the nature of the starting Fe(III) salt on Fe(III) hydroxide crystallization in alkaline medium
Author(s) -
Krivoruchko O. P.,
Zolotovskii B. P.,
Buyanov R. A.,
Šolcová A.,
Šubrt J.
Publication year - 1983
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.19835040923
Subject(s) - crystallization , precipitation , ferrimagnetism , hydroxide , amorphous solid , materials science , chemical engineering , salt (chemistry) , phase (matter) , inorganic chemistry , chemistry , crystallography , magnetization , magnetic field , physics , organic chemistry , quantum mechanics , meteorology , engineering
Abstract It is shown that amorphous precipitates of Fe(III) hydroxides are composed of two phases, namely weakly magnetic primary particles and ferrimagnetic fine‐grained particles. The relative proportion of the two phases, the type of phase transitions and the rate of amorphous precipitate crystallization during the ageing process are determined by the precipitation temperature. The crystallization of Fe(III) hydroxides during the ageing in mother liquors occurs by the “oriented growth” mechanism.