Table 11. — Comparison of X-ray data for pellets sepcv- 



rated from core E-31, 20-23 cm,, with data for the 



mineral vivianite 



Table 12. — Distribution of iron and manganese in core 

 E-26 



Observed 

 pattern 



7.95 



6.78 



4.91 



4.55 



4.32 



4.07 



3.85 



3.35 



3.21 



2.97 



2.71 



2.64 



2.53 



2.43 



2.32 



2.23 



2.18 



2.07 



1.93 



1.91 



1.82 



1.77 



1.68 



1.58 



Observed 



intensity 



M 



vs 



M 

 W 



w 



vw 



M 



M 



M 



S 



s 

 vw 



M 

 M 

 W 

 W 



w 

 w 



w 

 w 

 vw 

 vw 

 w 

 w 



Vivianite 

 (ASTM No. 3-0070) 



dA 



I/I, 



8.00 

 6.80 

 4.91 

 4.50 

 4.32 

 4.09 

 3.84 

 3.65 

 3.33 

 3.20 

 2.97 

 2.71 

 2.64 

 2.52 

 2.42 

 2.31 

 2.23 

 2.19 

 2.07 

 2.01 

 1.96 

 1.92 

 1.89 

 1.82 

 1.78 

 1.67 

 1.59 

 1.55 

 1.52 

 1.49 

 1.47 



27 



100 



40 



13 



4 

 13 

 40 



5 



3 

 53 

 67 

 67 



8 

 33 

 40 

 27 

 20 

 20 

 23 



33 



20 

 11 

 13 

 40 

 23 



7 

 11 

 12 



7 



Core 



No. 



E-26 



Interval 



(cm) 



Fe 



(weight 

 percent) 



Mn 

 (weiTht 

 percent) 



Mn/Fe 



34 



