Temperature Dependence of the Bragg Peak-Intensity Close to the -Incommensurate- Transition in Quartz

Table 1

Values of the critical exponent for the order parameter (Bragg intensity) and amplitude within the temperature intervals indicated for the , and incommensurate phases of quartz.

Process	Phases	Temperature interval (K)		n/s·K^2β	Figure no.
Heating	INC	845.57 < < 847	−0.35	13974	Figure 1
Heating	INC	843.95 < < 845.3	−0.07	11003	Figure 2
Heating		847.23 < < 847.62	−0.53	8349	Figure 3
Cooling		847.31 < < 848.18	−0.27	4895	Figure 4
Cooling	INC	845.88 < < 846.68	−0.29	10732	Figure 5
Cooling		843.61 < < 843.95	1.32	90219	Figure 6
Cooling		844.5 < < 845.1	0.62	26903	Figure 7