Abstract:Quartz as a mineral has a stable crystalline phase at room temperature and atmospheric pressure; at low temperatures it is in the phase and when it is heated up, it transforms into the phase through the intermediate (incommensurate) phase within the temperature interval of nearly 1.3 K at around 847 K. The order parameter occurs due to a tilting of SiO 4 tetrahedra around the threefold axis, which can be related to variation of the peak-intensity with the temperature in quartz. In this study, we analyze the te… Show more
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