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Table T1. Conversion factors between oxide and elemental concentrations.
 
Oxide
(wt%)
Conversion
factor
Element
(wt%)

SiO2

0.4675

Si

Al2O3

0.5293

Al

Fe2O3

0.6994

Fe

FeO

0.7773

Fe

MnO

0.7745

Mn

TiO2

0.5995

Ti

CaO

0.7143

Ca

Na2O

0.7419

Na

K2O

0.8301

K

MgO

0.6030

Mg

P2O5

0.4365

P

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