# columns: phi, Z
0.55875	17.64167
0.57296	19.77422
0.58765	22.25497
0.60285	24.82417
0.61222	26.957
0.61857	28.10066
0.6234	29.25831
0.62827	30.43296
0.63485	32.03714
0.63817	33.23517
0.64152	33.80719
0.64489	34.89097