Date: Mon, 16 May 2011 14:06:20 -0400
Reply-To: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: "Butcher, Robert" <Robert.Butcher**At_Symbol_Here**VA.GOV>
Subject: Re: Inorganic chemistry Cu + AgI or AgSe --> black solid?
In-Reply-To: <BE28425130279043A5B92A2BC7116E233D105E**At_Symbol_Here**>

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

1400 VFW Parkway

West R oxbury, 02132

857-203-6612 (office)

617-799-8605 (cell)

857-203-6689 (fax)




From: DCHAS-L Discuss ion List [mailto:DCHAS-L**At_Symbol_Here**] On Behalf Of Russell VernonSent: Monday, May 16, 2011 11:54 AM
To: DCHAS-L**At_Symbol_Here**LIST.UVM .EDU
Subject: [DCHAS-L] Inorganic chemistry Cu + AgI or AgSe --&g t; black solid?


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>

Have you-all had this experience before?




-Ru ss

Russell Vernon, Ph.D.


Environmental Health & Safet y

U niversity of California, Riverside

900 University Ave

Riverside, CA 92521


Direct (951) 827-5119

Admin (951) 827-55 28

Fax (951) 827-5122

Previous post   |  Top of Page   |   Next post

The content of this page reflects the personal opinion(s) of the author(s) only, not the American Chemical Society, ILPI, Safety Emporium, or any other party. Use of any information on this page is at the reader's own risk. Unauthorized reproduction of these materials is prohibited. Send questions/comments about the archive to
The maintenance and hosting of the DCHAS-L archive is provided through the generous support of Safety Emporium.