I figured I should chime in here, since I recently finis hed a dissertation on the magnetic properties of copper diazine complexes.
The great thing about copper complexes is that they display a variety of color s. A color change usually suggests the copper ion has reacted with somethin g.
If it was Copper(I) Iodide it would be tan.
Copper(I) Oxide it would be red.
Co pper(II) oxide is black.
It is possible that you have neutral Ag(0) since you mentioned that AgI and AgSe was introduced, although this is just a guess.
A p owder XRD would confirm the lattice parameters if you can scrape some off.
Rob Butcher, PhD
Boston Health Care System
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We have a small mystery.< p class="MsoNormal">In a vacuum chamber with an ion pump, the researchers recently e xperienced having all the open copper surfaces coated with a black solid
They had recently introduced AgSe (solid) to the chamber which also contained AgI
One opinion is that the chamber experie nced an ion discharge which oxidized the copper to copper oxide< /span>
Russell Vernon, Ph.D.
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