Crystal morphology of bismuth germanate (Bi 4Ge 3O 12)

The periodic bond chain (PBC) theory is applied to the crystal structure of bismuth germanate (BGO). Seven F slices were found and their morphological importance (MI) was determined. Good agreement was obtained with the results of sphere growth experiments of BGO and with literature data of hydrothe...

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Bibliographic Details
Published in:Journal of crystal growth 1989-09, Vol.97 (2), p.430-442
Main Authors: Smet, F., Bennema, P., van der Eerden, J.P., van Enckevort, W.J.P.
Format: Article
Language:English
Subjects:
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Methods of crystal growth
physics of crystal growth
Physics
Theory and models of crystal growth
physics of crystal growth, crystal morphology and orientation
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Summary:The periodic bond chain (PBC) theory is applied to the crystal structure of bismuth germanate (BGO). Seven F slices were found and their morphological importance (MI) was determined. Good agreement was obtained with the results of sphere growth experiments of BGO and with literature data of hydrothermally and flux grown eulytine-type crystals. The most predominant F faces appear to be {112} and {1̄1̄2̄}, at some distance followed by {220}, {310}, {400} and {123}. For the corresponding two-dimensional connected nets, the Ising critical temperatures were calculated. Careful analysis of bond energies, taking the liquid phase composition and experimental data on the roughening temperatures of the crystal faces into account, leads to a value for the solid-liquid interaction in terms of wetting.
ISSN:0022-0248
1873-5002
DOI:10.1016/0022-0248(89)90224-8