Table 4 Structural parameters (coordination number, N; bond length, r; Debye–Waller factor, σ2; fraction of Nd link to borate, x and fraction of Nd link to silicate, y) for glasses Matrix-Nd10 and Matrix-Nd30 glasses obtained from the analysis of the Nd LIII-edge EXAFS spectra. The asterisk denotes values that were kept fixed in the fitting process.

From: Lanthanide (Ce, Nd, Eu) environments and leaching behavior in borosilicate glasses

Nd-LIII-edge

 

N

r (Å)

σ2 (× 10−3 Å2)

Matrix-Nd10

 

x = 0.808 ± 0.080

O

10

2.33

6.5

B

10

3.12

15.5

O

4

4.03

2.8

Nd

2

4.35

13.3

  

y = 0.192 ± 0.080

O

8

2.20

5.1

Si

6

3.50

7.3

O

3

4.03

2.8

Nd

5

4.35

13.3

Matrix-Nd30

 

x = 0.797 ± 0.040

O

10

2.33

6.5*

B

10

3.11

15.5*

O

4

4.04

2.8*

Nd

2

4.35

13.3*

  

y = 0.203 ± 0.040

O

8

2.20

5.1*

Si

6

3.48

7.3*

O

3

4.03

2.8*

Nd

5

4.34

13.3*

Nd2O3

   

O

4*

2.33

9.4

O

4*

2.61

8.1

Nd

6*

3.74

6.1

Nd

6*

3.85

6.2

O

15

4.47

14.0

O

9*

5.05

14.05

Nd

6*

5.40

8.3

O

15*

5.93

8.0

Nd

18*

6.58

17.2

Nd

12*

7.18

13.3

Back to article page