Table 2 EXAFS fitting results for the coordination state of clay-hosted Y in the regolith samples.

From: Adsorption of rare earth elements in regolith-hosted clay deposits

Sample

Depth

Shell

Path

CN

R (Å)

σ2 (Å−2)

ΔE0 (eV)

S02

χ2

R-factor

n

Zhaibei, China

 LJ316

2 m

1st

Y-O

8.3 (9)

2.38 (1)

0.007 (2)

−1.5

1

317

0.017

16

Ambohimirahavavy, Madagascar

 PIT2

4.8 m

1st

Y-O

7.9 (8)

2.37 (1)

0.007 (2)

−1.5

1

120

0.013

14

 MAD238-217

9 m, 4 m

1st

Y-O

8.1 (8)

2.35 (1)

0.008 (2)

0

1

11

0.018

5

  1. CN is coordination number. R is radial distance in ångström. n is number of merged spectra. Definitions of other fit parameters listed in this table are provided in the ‘Data Processing’ section of the methods. Errors shown within parentheses are on last digit of the fitted variable. Values without errors were fixed in the final fit.
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