/*#Sodium Niobium Oxide (Lueshite), NaNb03
#Orthorhombic, Pbma (57), 2=8. It has a distorted perovskite structure which was
#refined by Sakowski-Cowley et al. [1969] after earlier work [Vousden, 1951; Wells
#and Megaw, 1958].
#Lattice constants of this sample
#a = 5.5687(5), b = 15.523(2), c = 5.5047(6)
#a/b = 0.3587, c/b = 0.3546
#Volume 475.84 A 3 */
seed      
index_lam 1.540596 
index_zero_error      
try_space_groups "16" 
                       
load index_th2 { 
22.71
22.89
23.41
28.57
32.11
32.49
36.37
36.61
36.88
38.00
38.25
38.41
39.81
40.13
43.19
46.35
46.79
51.11
51.94
52.30
52.45
52.60
55.11
55.32
57.49
}