83 Secondary electron image of star D on sample 5 etched in chlorine/argon
 plasm a ......... .... .............. .................................... ...........................72

84 Backscatter electron image of star D on sample 5 etched in chlorine/argon
 plasm a ......... .... .............. .................................... ...........................72

85 Secondary electron image of star D with a map of EDS points ..........................73

86 EDS spectrum for point 1 on star D of sample 5 etched.......................................73

87 EDS spectrum for point 2 on star D of sample 5 etched.......................................74