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High Pressure Research
An International Journal
Volume 20, 2001 - Issue 1-6
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Original Articles

Growth of piezoelectric quartz crystals of large dimension on seeds parallel to the (10–11) face and lengthened along the Y-axis

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Pages 211-218 | Received 10 Jan 2000, Accepted 25 Feb 2000, Published online: 19 Aug 2006
 

Abstract

We have grown crystals on seeds parallel to the side of the negative rhombohedron by the hydrothermal method. Their dimension was equal to the projection one along the Y-axis to the plane (01–11) and approximately exceeded the size of the crystal along the X-axis by one order. In Russia these crystals are referred to as - ry′. The maximal sizes of ry′ -cryszals are 410mm and 120mm along the Y- and X-axes, respectively. It is established that each crystal increases its dimension along the X-axis due to the formation of the sides of the sharpest rhombohedron (20–21). These faces form the pyramids of growth by which it is possible to get the plates from an average part of each crystal. Their dimension exceeds the initial one by 15-20mm along the X-axis. We have studied the structural and morphological properties of ry′ -crystals grown at different rates at the temperature of crystallization of 330-410°C and a pressure up to 150 MPa.

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