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Glycothermal Reaction of Rare‐Earth Acetate and Iron Acetylacetonate: Formation of Hexagonal ReFeO3
Author(s) -
Inoue Masashi,
Nishikawa Toshihiro,
Nakamura Tomohiro,
Inui Tomoyuki
Publication year - 1997
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1997.tb03103.x
Subject(s) - crystallite , calcination , phase (matter) , materials science , crystallography , hydrothermal circulation , ethylene glycol , amorphous solid , particle size , hexagonal phase , hydrothermal reaction , particle (ecology) , crystal (programming language) , hexagonal crystal system , chemical engineering , mineralogy , chemistry , organic chemistry , catalysis , geology , programming language , oceanography , computer science , engineering
The reaction of a mixture of iron acetylacetonate and rare‐earth (Tm‐Lu) acetate in 1,4‐butanediol at 300°C yielded a novel phase of ReFeO 3 having a hexagonal crystal system (a0 = 6.06, c 0 = 11.74 A) together with small amounts of Fe 3 O 4 and/or the garnet phase. The particle size of the product distributed in a narrow range and selected area electron diffraction from a particle having apparent polycrystalline outlines suggested that each particle was actually a single crystal grown from one nucleus. On calcination, the hexagonal phase irreversibly transformed into the perovskite phase at around 980°C. The use of ethylene glycol in place of 1,4‐butanediol of the present procedure afforded Fe 3 O 4 , while hydrothermal reaction of the same starting materials yielded a mixture of Fe 2 O 3 and an amorphous rare‐earth phase.