def make_opacity_dict(lam, a, k_abs, k_sca, g_sca, rho_s, zscat=None):
    """
    To mimick the behavior of the `makedustopac.py` code by Kees Dullemond:
    package the opacity information to a dictionary.
    """
    package = {'lamcm': lam, 'kabs': k_abs, 'kscat': k_sca, 'gscat': g_sca,
        'rho_s': rho_s, 'a': a, 'zscat': zscat}
    return package
