Growth habit of rutile and alpha-Al2O3 crystals

Citation
Wj. Li et al., Growth habit of rutile and alpha-Al2O3 crystals, J CRYST GR, 208(1-4), 2000, pp. 546-554
Citations number
12
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
JOURNAL OF CRYSTAL GROWTH
ISSN journal
00220248 → ACNP
Volume
208
Issue
1-4
Year of publication
2000
Pages
546 - 554
Database
ISI
SICI code
0022-0248(200001)208:1-4<546:GHORAA>2.0.ZU;2-U
Abstract
The growth habits of TiO2 and alpha-Al2O3 crystals are observed on the synt hetic crystals in the hydrothermal or glycothermal solutions by means of TE M and ED analysis. It is concluded that the habit of alpha-Al2O3 crystal sh ould be the hexagonal platy {0 0 0 1} with the {1 1 (2) over bar 3} faces; the growth habit of rutile is an elongated prism, bounded by {1 1 0}, {1 0 0} and {1 0 1} forms. These results are successfully explained by a new rul e concerning growth habit proposed by Wen-Jun Li et al. (J. Crystal Growth, 1999, to be published). Moreover, the growth habit of rutile is related to the concentration of precursor (TiCl4 solution). When the concentration of TiCl4 solution increases from 0.25 to 1 mol/l, the morphology of particles is changed from prismatic form to elongated prismatic form. Its habit chan ge is analyzed through the study of the growth mechanism of rutile. (C) 200 0 Elsevier Science B.V. All rights reserved.