fig7
![Recent advances in the marketing, impurity characterization and purification of quartz](https://image.oaes.cc/036f0845-0107-47fd-9d89-518c1048755f/mmm2017.fig.7.jpg)
Figure 7. Diagram of the structural transformation of quartz crystals at different temperatures. (A) α-quartz; (B) β-quartz; (C) phosphor-quartz; (D) square quartz.
Figure 7. Diagram of the structural transformation of quartz crystals at different temperatures. (A) α-quartz; (B) β-quartz; (C) phosphor-quartz; (D) square quartz.
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