#NHI =  16.39 0.1
#aUV =  0  0.25
#min aUV = -0.5
min k_C = -1.
max k_C = 1.
min k_N = -1.
max k_N = 1.
min k_Al = -1.
max k_Al = 1.
min k_Fe = -1.
max k_Fe = 1.