Journal
MATERIALS LETTERS
Volume 54, Issue 2-3, Pages 108-113Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0167-577X(01)00546-8
Keywords
goethite; (alpha-FeOOH) tetramethylammonium hydroxide; acicular particles; XRD; FT-IR; TEM; FeOOH goethite
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The acicular alpha-FeOOH particles were synthesized from FeCl3 solutions at a very high pH using tetramethylammonium hydroxide as a precipitating agent. Samples were characterized by X-ray powder diffraction, FT-IR spectroscopy and transmission electron microscopy, alpha-FeOOH precipitated as a single phase from room temperature to 160 degreesC in a broad aging time interval. The ratio of the length to the width of alpha-FeOOH particles depended on the temperature and concentration of the starting FeCl3 solution, Multidomainic character of alpha-FeOOH particles gradually decreased with an increase in the temperature and time of aging. (C) 2002 Elsevier Science B.V. All rights reserved.
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