Abstract
IN connexion with a study of crystal growth from lead oxide and lead oxide–lead fluoride melts, we have recently observed growth spirals on (0001) faces of tabular magnetoplumbite (PbFe12O19) crystals. The spirals on crystals obtained from lead oxide–lead fluoride melts are polygonal, relatively open, and show concave growth fronts as well as reversed curvatures near the outer edges of the crystals. The step heights appear to be small multiples of the unit cell dimension in the c direction. The spirals on crystals grown from lead oxide melts are polygonized to various degrees, are more tightly wound, and exhibit greater step heights.
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LEFEVER, R., CHASE, A. Growth Spirals on Synthetic Magnetoplumbite Crystals. Nature 190, 255–256 (1961). https://doi.org/10.1038/190255a0
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DOI: https://doi.org/10.1038/190255a0
