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Table T10. Average measured values and 3σ for major elements, Expedition 338.

Component Standard Sample JB-3 Standard Sample JA-1
Reference value (100% normalized) Measured value (average) Standard deviation (3σ) Relative standard deviation
(%) 		Reference value (100% normalized) Measured value (average) Standard deviation (3σ) Relative standard deviation
(%)
Na2O 2.720 2.713 0.106 1.3 3.867 3.821 0.155 1.4
MgO 5.170 5.109 0.085 0.6 1.581 1.541 0.097 2.1
Al2O3 17.135 17.173 0.08 0.2 15.325 15.300 0.092 0.2
SiO2 50.767 50.842 0.141 0.1 64.413 64.342 0.227 0.1
P2O5 0.293 0.286 0.014 1.6 0.166 0.144 0.012 2.7
K2O 0.777 0.764 0.02 0.9 0.775 0.783 0.034 1.5
CaO 9.753 9.789 0.049 0.2 5.739 5.691 0.031 0.2
TiO2 1.435 1.432 0.032 0.7 0.856 0.855 0.025 1.0
MnO 0.176 0.184 0.005 0.9 0.158 0.159 0.006 1.2
Fe2O3 11.775 11.810 0.065 0.2 7.119 7.077 0.062 0.3

Values determined on the Supermini (Rigaku) X-ray fluorescence spectrometer from a selection of standard samples.

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