Table 4 Comparison between the site scattering (s.s.) of extra-framework (EF) cation sites calculated from SEM-EDS chemical data (s.s. from partition) and Rietveld refinement (s.s. from Rietveld refinement).
From: The mechanism of iron binding processes in erionite fibres
Site | KCl exchanged | Fe-exchanged | ||||
|---|---|---|---|---|---|---|
EF cation | s.s from partition (e−) | s.s. from Rietveld refinement (e−) | EF cation | s.s from partition (e−) | s.s. from Rietveld refinement (e−) | |
Ca1 | Mg0.6 | 7.2 | 4.1 (7) | |||
Ca2 | Na1.5K0.6 | 27.9 | 26.1 (8) | Na0.6(1.5) | 6.6 (16.5) | 24.3 (6) |
Ca3 | Mg0.3 | 3.6 | 5.3 (5) | Fe0.8 | 20.8 | 20.2 (9) |
K1 | K2 | 38 | 38 | K2 | 38 | 38 |
K2 | K1.3 | 24.7 | 24.7 (7) | K1.1 | 20.9 | 23.1 (6) |
OW7–12 | K2 | 38 | 37 | K1.1 | 20.9 | 23 |
total | 132.2 | 131 (2) | total | 124.3 (134.2) | 133 (3) | |
