387 23
Analysis with a compromised sample shape:
surface gouge crater left by tool impact
a
Mg (normalized weight percent)
Fe (normalized weight percent)
Analysis of K411: Bulk polished and tool gouge crater
0
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BULK-K411
BULK-600grit
1
Extent of ideal
flat specimen
measurements
b
. Fig. 23.8 a SEM (ET+)
SE + BSE image of a crater pro-
duced in polished K411 glass
after gouging with a diamond
scribe. b Plot of the normalized
Mg and Fe concentrations calcu-
lated for measurements at vari-
ous locations in this crater
23.4 · Useful Indicators of Geometric Factors Impact on Analysis