Characterization of growth sectors in synthetic quartz grown from cylindrical seeds parallel to [0001] direction

In the present study, the morphology and the impurity distribution were investigated in growth sectors formed around the [0001] axis of synthetic quartz crystals. Plates containing cylindrical holes and cylindrical bars parallel to [0001] were prepared by ultrasonic machining and further used as seed-crystals. The hydrothermal growth of synthetic quartz was carried out in a commercial autoclave under NaOH solution during 50 days. The morphologies of crystals grown from cylindrical seeds were characterized by X-ray diffraction topography. For both types of crystals, +X- and X- growth sectors were distinctly observed. Infrared spectroscopy and ionizing radiation were adopted to reveal the distribution of point defects related to Si-Al substitution and OH-species. It was found a different distribution of Al-related centers in relation to the crystals grown from conventional Y-bar and Z-plate seeds.

Bibliographic Details

Main Authors:	Guzzo,Pedro Luiz, Shinohara,Armando Hideki, Costa,Harlan Allen Dantas, Raslan,Alberto Arnaldo, Suzuki,Carlos Kenichi, Azevedo,Walter Mendes
Format:	Digital revista
Language:	English
Published:	ABM, ABC, ABPol 2004
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392004000200011
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