Review on Selection and Experiment Method of Commonly Studied Simulated Radionuclides in Researches of Nuclear Waste Solidification

Table 3

Unit cell dimensions and fit parameters from the Rietveld refinement of Ba_1.15−xCs_2xCr_2.3Ti_5.7O₁₆.

Composition		x = 0	x = 0.15	x = 0.25
Space group		I4/m	I2/m	I2/m
Unit cell parameters	a (Å)	10.0561 (2)	10.0244 (6)	10.192 (1)
	b (Å)	—	2.9333 (2)	2.911 (0)
	c (Å)	2.95210 (7)	10.0075 (6)	10.159 (1)
	β	—	90.058 (2)	90.126 (3)
	Volume, V (Å^3)	298.53 (2)	298.95 (3)	303.34 (7)
	d, Å	5.08	5.09	5.18
Refinement residual	Rwp (%)	3.72	3.68	4.83

“d” is the mean diagonal length of the tunnel cross section, and “R_wp” is the weighted Rietveld parameter [20].