Excellent Crystal Coloration and An Extraordinary Improvements of Developing Synthetic Quartz Single Crystals Growth and Defects
Journal Title: Archives of Organic and Inorganic Chemical Sciences - Year 2018, Vol 3, Issue 3
Abstract
The analysis of the impurity content crystals grown in sodium carbonate solution is carried out using flame technique. Colored crystals have been produced from aqueous solutions of potassium carbonate under laboratory conditions and using a steel autoclave. The seeds were slices cut parallel to the planes (0001). With the impurity of aluminum and irradiation, defective color centers have generated quartz coloration phenomenon. This is occurred on the base of the electrical balance by exchanging aluminum ions with tetravalent silicon ions in the presence of alkali elements (monvalent) i.e. Na+ or Li+. Interestingly, the current paper introduces a method suggests the utilization of silica-rich rocks to develop the growth of large crystals of synthetic quartz. Until recently, all the quartz required for the production of oscillator crystals for frequency control has been obtained from natural resources. Although quartz is one of the most abundant minerals in the earth’s crust, it is only found in large crystals of the required quality in a few isolated regions. During the past 20 years, work has been carried out to develop processes for the controlled growth of quartz in the laboratory [1,2]. Considerable success has been obtained by many teams [3], crystals of piezoelectric-quality weighing over 1 lb. having been grown [4]. All the modern processes used for the growth of synthetic quartz have been developed by pioneering works [5,6] in the current century. Although the methods adopted by various workers in this field are basically similar, there are certain fundamental differences which affect the properties of the crystals. Because of its glass forming properties and its allotropic modifications it is not possible to grow quartz from the vapor or the melt. Growth from solution must be used and as quartz is virtually insoluble in aqueous media under ordinary ambient conditions it is necessary to use elevated temperatures and pressures to obtain sufficient solubility. These so-called hydrothermal conditions are probably similar to those in which much natural quartz has been formed. At temperatures approaching 400°C and pressures of 1000 atm (about 7 tons/in.2) quartz is readily soluble in alkaline solutions such as sodium carbonate.
Authors and Affiliations
Loai Aljerf, Nuha AlMasri
Keywords
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- EP ID EP603565
- DOI 10.32474/AOICS.2018.03.000164
- Views 68
- Downloads 0
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