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Fig. 9


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Comparison of chemical analyses of actinolite asbestos carried out with EDS versus WDS reported on a diagram (Si apfu vs Mg/Mg+Fe2+). The calculated uncertainty of the WDS measurements on the Mg/Mg+Fe2+ ratio is negligible, on S iapfu it is plus or minus 0.3%, with the EDS it is 2.4% on both values. The WDS measurements are represented by a line, the EDS measurements by a rectangle whose sides are proportional to the uncertainty.

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