def calc_relativistic_correction(stoichiometry):
    """Calculate the relativistic correction to the Kramers-Kronig transform.

	Parameters:
	-----------
	stoichiometry : array of integer/float pairs
		Each pair in the list consists of an atomic number and the relative proportion of that element.

	Returns
	-------
	This function returns a ``float`` holding the relativistic
	corection to the Kramers-Kronig transform.

	"""
    correction = 0
    for z, n in stoichiometry:
        correction += (z - (z / 82.5) ** 2.37) * n
    return correction
