Usually, the inclusions contain Fe radical, Al radical, etc. Its leading terms are inclusion density, etch channel (dislocation) density and infrared absorption constant О±. The evaluation of artificial quartz crystal quality is specified in IEC 60758. The shapes of grown artificial quartz crystal 5.2.2 Specifications of artificial quartz crystal The growth speed is different for each crystal axis and is shown as below.ДҐ.13. At this time, solution quartz convection contributes to quartz crystal growth on the seeds. Then the pressure of the autoclave becomes about 400В MPa and convection begins. Generally, the temperature of the growth zone and the material zone are kept around 300В вЊ and 400В вЊ, respectively. Under high pressure and high temperature quartz crystal is soluble in alkaline solutions like Na 2CO 3 or NaOH, and this alkaline solution is put in the autoclave. Generally, Y-bar and/ or Z-plate are used for the seeds. Seed crystals are set in the growth zone and raw quartz called вЂlascaвЂ™ is set in the raw material zone. The upper zone is the crystal growth zone and the lower zone is the raw material zone. 5 The autoclave is divided into two zones by the baffle that controls the convection of the autoclave. They are grown in the autoclave as shown in Fig.

Artificial quartz crystals are produced by the hydrothermal process.

Quartzcrystal field