Table 8

EXAFS fit results for strontium sorbed to amorphous silica and goethite (R, N, σ2 and ΔE0 adjusted in fits).
Electrolyte
 pH
 T(K)
 Sr-Za
 R(Å)
 N
 σ2(Å2)
 ΔE0(eV)
Amorphous Silica, Srtotal = 10-3 M
0.1 M Na Cl
 8.1
 20
 Sr-O
 2.60
 10.0
 0.0081
 -4.9
0.1 M Na Cl
 8.9
 20
 Sr-O
 2.60
 10.1
 0.0087
 -5.4
0.1 M Na Cl
 9.4
 25
 Sr-O
 2.60
 10.6
 0.0094
 -6.1
0.1 M Na Cl
 9.7
 16
 Sr-O
 2.60
 10.3
 0.0086
 -5.9
Goethitec, Srtotal = 10-3 M
0.1 M Na Cl
 8.5
 20
 Sr-O
 2.63
 10.1
 0.0084
 -6.6



Sr-C
 3.05
 3.8
 0.0018



Sr-Sr
 4.14
 3.4
 0.0021



Sr-Sr
 4.28
 1.4
 0.0005



Sr-Sr
 4.90
 3.3
 0.0031
0.1 M Na Cl
 8.7
 RT
 Sr-O
 2.58
 8.3
 0.0126
 -5.6
0.1 M Na Cl
 9.3
 15
 Sr-O
 2.61
 9.8
 0.0081
 -5.0
0.1 M NaNO3
 9.9
 12
 Sr-O
 2.60
 9.1
 0.0077
 -6.9

aZ = backscattering atom.

bScale factor (S02) = 0.92

cGoethite samples and analyses are from Sahai et al. [26]

Carroll et al. Geochemical Transactions 2008 9:2   doi:10.1186/1467-4866-9-2