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Morphology of β‐BaB 2 O 4 (BBO) Crystals in Relation to its Structure and Growth Conditions
Author(s) -
Wang B. G.,
Lu Z. P.,
Shi E. W.,
Zhong W. Z.
Publication year - 1998
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/(sici)1521-4079(1998)33:2<275::aid-crat275>3.0.co;2-w
Subject(s) - morphology (biology) , crystallography , trigonal crystal system , crystal structure , character (mathematics) , crystal growth , crystal (programming language) , chemistry , materials science , geometry , mathematics , geology , computer science , programming language , paleontology
β‐BaB 2 O 4 (BBO) crystals with well‐defined morphology have been grown from Na 2 O solutions using the top seeded solution growth (TSSG) method. The crystal morphology in relation to its structure and growth conditions has been studied in detail on the basis of crystallography and crystal chemistry. It is found that the morphological characteristics are related to the orientations of structural unit (B 3 O 6 ) 3— anion rings in the crystal. On the other hand, the growth parameters may greatly affect the appearance of faces of the crystal, but the crystals still generally take trigonal in outline and have a diagnostic character of point group 3 m . The observed morphology is in disagreement with BFDH and PBC analyses and is explained from the incorporation of the growth units on the faces and facets. Since the incorporation rates of the growth units are different on different faces, the boule habits with well‐defined morphology are formed.