def bC_Mg_SO4_MNTR08(T, P):
    """c-a: magnesium sulfate [MNTR08]."""
    b0 = -0.03089
    b1 = 3.7687
    b2 = -37.3659
    C0 = 0.016406
    C1 = 0.34549
    alph1 = 1.4
    alph2 = 12.0
    omega = 1.0
    valid = T == 298.15
    return b0, b1, b2, C0, C1, alph1, alph2, omega, valid
