Table 3.

Fitting parameters a and b for Sr fits by Eqs. (8) and (9) used in the plots shown in Fig. 4. The values for $K_d^{int}$are fixed according Puukko et al. (2018).

	Fitted Eq.	$K_d^{int}$ (m3/kg)	a (m3/kg)	b (-)
PP219_1	Eq. (8)	–	0.0171 ± 0.0002	0.179 ± 0.013
	Eq. (9)	0.0044	0.0127 ± 0.0002	0.235 ± 0.014
PP219_2	Eq. (8)	–	0.0239 ± 0.0004	0.10 ± 0.02
	Eq. (9)	0.0044	0.0195 ± 0.0004	0.12 ± 0.03
PP309	Eq. (8)	–	0.0195 ± 0.0005	0.10 ± 0.03
	Eq. (9)	0.0044	0.0151 ± 0.0005	0.13 ± 0.04
PP175	Eq. (8)	–	0.050 ± 0.002	0.12 ± 0.03
	Eq. (9)	0.0073	0.043 ± 0.002	0.14 ± 0.03
KR56	Eq. (8)	–	0.0053 ± 0.0006	0.29 ± 0.06
	Eq. (9)	0.003	0.0024 ± 0.0006	0.48 ± 0.12