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Structural characteristics of Zachery treated turquoise  

Kwon, Ki-Ran (Department of Materials and Chemical Engineering, Graduate School of Engineering, Hanyang University)
Bang, Sin-Young (Division of Advanced Material Science and Engineering, Hanyang University)
Park, Jong-Wan (Department of Materials and Chemical Engineering, Graduate School of Engineering, Hanyang University)
Shim, Kwang-Bo (Division of Advanced Material Science and Engineering, Hanyang University)
Abstract
The surface characteristics of Zachery-treated turquoise stones have been studied in detail with a comparison of natural and plastic-impregnated turquoise. The SEM-EDS analysis exhibited that Zachery-treated turquoise was characterized by the uniform distribution of potassium element through the specimen and did not show the sharp crystalline $SiO_2$ facet and boundary phase which are common in natural ore. The potassium element shown in the Zachery-treated turquoise seemed to be occurred during the treatment process for the improvement of durability. The bar-shaped crystals observed in the pore was found to be a feature of Zachery treated turquoise and are expected to influence on their stability and durability, while the pore sizes in turquoise stones depends on the parameter of the treatment procedure.
Keywords
Turquoise; Zachery treatment; Potassium; Bar-shaped crystals;
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Times Cited By KSCI : 2  (Citation Analysis)
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11 JCPDS cards No. 50-0302