Original paper

Model of textural development of layered crystal aggregates

Rodriguez-Navarro, Alejandro

European Journal of Mineralogy Volume 12 Number 3 (2000), p. 609 - 614

19 references

published: May 31, 2000
manuscript accepted: Jan 6, 2000
manuscript received: Apr 27, 1999

DOI: 10.1127/ejm/12/3/0609

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ArtNo. ESP147051203007, Price: 29.00 €

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Abstract

Abstract A two-dimensional computer model is developed to study the evolution of texture during the growth of layered mineral aggregates. The program computes the number, size and orientation (texture) of crystals forming the outer surface of the aggregate, as well as the evolution as a function of time. In particular, the analysis focuses on the influence of growth parameters such as the anisotropy of the growing crystal forms, the relative growth rate of the crystal faces, the nucleation density on the substrate surface, the flow direction of the mineralizing solution and the shape of the substrate. The simulation provides an explanation for the development of a preferential orientation in a polycrystalline material growing from randomly oriented nuclei. The calculated distribution of crystal orientations, and its evolution with time, is in agreement with textures observed in synthetic and natural polycrystalline aggregates.

Keywords

crystallographic textureanisotropic grain growthmineralizationcavitiescrystal growthflow.