Table 1.

Experimental and calculated interplanar distances, the associated Miller indices, and relative intensity characterizing the R3̄ m (space group 166) phase from a sample containing 52.9 wt % surfactant at 30°C

dexp/nm	h	k	l	Relative intensity	dcalc	% error
6.63	1	0	1	0.79	6.60	−0.39
5.70	0	0	3	1	5.70	0.00
5.52	0	1	2	0.81	5.47	−0.557
4.13	1	1	0	0.34	4.13	0.00
3.67	1	0	4	0.42	3.67	−0.08
3.50	0	2	1	0.32	3.50	0.06
3.09	0	1	5	0.40	3.08	−0.20
2.86	0	0	6	0.50	2.85	−0.25
1.90	1	3	1	0.13	1.97	3.55

h, k, and l are the Miller indexes. The calculated Bragg peak positions were obtained according to (1/d_calc)² = (4/3)·(h² + hk + k²)/a² + l²/c², with the condition limiting possible reflections −h + k + l = 3n, with n integer (30). a = b ≠ c are the unit cell parameters and γ = 120° is the angle between a and b forming a plane perpendicular to the direction of c. The unit cell dimensions are a = 2d₁₁₀ = 8.26 nm and c = 3d₀₀₃ = 17.08 nm. The error was estimated by 100(d_exp − d_calc)/d_calc.