Table 2. Coefficients used to describe the temperature dependence of the cell parameter of Al₂O₃ using equation (4) (note that this equation uses temperature in °C).

	a	c
c0	4.75814 Å	12.99113 Å
c1	6.55 × 10−6	6.54 × 10−6
c2	1.82 × 10−9	2.60 × 10−9