It is unclear exactly why only etched sample 5 has these chlorine particles while etched

samples 2 and 3 do not even though all were exposed to similar chemistry. A possible

explanation is that gold can form chlorides. However, these chlorides are more difficult

to remove from the surface of the sample because of their low volatility as suggested by

Efremov, Kim, and Kim. Several other stars on etched sample 5 were examined for

comparison. The results for two of those stars star C and star D, are located in Appendix

A-3. Star C had no particles on its surface, thus there were no chlorine peaks in the

energy dispersive spectroscopy spectrums. Star D did have a few particles. However,

the spectrums for star D do display chlorine peaks on the particles. As was the case for

stars A and B, for stars C and D any particles that were observed in the secondary

electron images are not observed in the backscatter electron image. There was no regular

pattern as to where the particles were located (ie, the edges, the tips, or the center of the

stars). The data was inconsistent to make any reasonable assumptions as to why there

were or were not particles on the samples and why some of those particles exhibited

chlorine peaks while others did not.