Table 2 Rietveld analysis results indicating the mineral phase quantification along with the composition of Al, Fe, Si, and TREE in each ion-adsorption clay size fraction: S1 (< 0.25 mm), S2 (0.25–0.5), S3 (0.5–2 mm).

From: Impact of particle size and associated minerals on rare earth desorption and incorporation mechanisms in a South American ion-adsorption clay

Samples

Kaolinite (Al2Si2O5(OH)4) (%)

Quartz (SiO2) (%)

Cronstedtite-1T (Fe3.66Al0.02 Si1.32O5(OH)4) (%)

Goethite (Fe0.83Al0.17O(OH) (%)

Al (wt%)

Fe (wt%)

Si (wt%)

TREE (mg/kg, ppm)

S1

79.6

7.3

7.5

5.6

12.5

9.2

24.0

4603.9

S2

55.5

32.3

2.7

9.5

6.8

7.6

35.1

2785.3

S3

21.5

66.4

1.0

11.1

3.4

6.9

40.4

1653.4

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