Morphology of single crystals

Growth forms are the forms of a crystal determined by the structural characteristics and the effects due to environmental conditions. Assuming that a growing crystal is bounded by two F faces only, the Tracht of the crystal is determined by the 

As discussed above, most natural diamond crystals are characterized by dislocation bundles originating from the center of a crystal and running nearly perpendicularly to the 111 surface with a growth banding pattern parallel to 111. There are, however, crystals showing complicated curved banding patterns, the origin of which will be a subject for future study. 

Some crystals exhibit a texture called a center-cross pattern, the origin of which was, at one time, a subject of controversy, as to whether the origin was by growth or by plastic deformation. The center-cross pattern is schematically illustrated in Fig. 9.12 it corresponds to a texture shown by the growth sectors of two coexisting crystal faces, lll and 100. This pattern indicates that the arms of the cross correspond to the growth sectors of 100, which disappear at the later stage of 

From these observations, we may conclude that, in the growth of natural diamond crystals, three faces, 111, 110, and 100, behave and show characteristics completely in agreement with the characteristics expected from PBC analysis. Therefore, we may conclude that, under the environmental conditions of natural diamond growth (principally in the silicate solution phase), 111 always behaves as a smooth interface under A/r/kT conditions, whereas the Ap,/lcT of 110, and particularly of 100, stays close to the origin under any conditions, and these faces behave exclusively as rough interfaces. 

In the case of synthetic diamond, grown under high-temperature, high-pressure conditions from a high-temperature solution with metal or alloy as the solvent, diamond crystals exhibit a cubo-octahedral Tracht bounded by 100 and 

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Since the evaporation of a solid would occur at the kink sites because the bonding is weaker, atoms would diffuse also to these sites before evaporation. A demonstration of this is to be found on the morphologies of single crystals after a period of heating in vacuum to cause substantial evaporation. The resultant surface shows an increase in the number of ledges and kinks relative to the area of the terraces. It is also to be expected that dislocations emerging at the surface of catalysts, either as edge or screw dislocations, would play a... 

The morphology of single crystals, the surface microtopographs of crystal... 

In this chapter, we briefly describe several techniques that provide state-of-the-art characterization of the structure and morphology of single-crystal surfaces. Such surfaces serve as models to understand and predict the behavior of nanoparticles or are directly relevant as supports (substrates) for nanoparticles. It is beyond the scope of this chapter to provide a comprehensive review of work in this field, but rather we provide a number of examples of results obtained by utilizing these surface characterization techniques which illustrates their applications. 

The correlation between the morphology of single crystals of PE and their thermal properties was in focus of many studies. Melting temperatures of 124.5 °C for the (200) sectors and of... 

Manley St., R.J. 1963. Growth and morphology of single crystals of cellulose triacetate. J Poly Sci A 1 1875-1892. 

This section describes the structure of the unit cell in polymers, principally as determined by X-ray analysis. The following sections describe the structure and morphology of single crystals, bulk crystallized crystallites, and spherulites and develops the kinetics and thermodynamics of crystallization. 

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