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Subject: Dog detection strategies beyond Hg...
Date: Mon, 16 May 2011 12:42:15 -0400
Author: "Secretary, ACS Division of Chemical Health and Safety" 		Next by Date:
Subject: Re: Inorganic chemistry Cu + AgI or AgSe --> black solid?
Date: Mon, 16 May 2011 14:17:06 -0400
Author: ILPI


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**EXCH-MBOX-1.exch.ucr.edu>

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)

Robert.Butcher**At_Symbol_Here**va.gov

 

 

From: DCHAS-L Discuss ion List [mailto:DCHAS-L**At_Symbol_Here**list.uvm.edu] 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?

 

Ideas?

Thanks,

-Ru ss

Russell Vernon, Ph.D.

Director

Environmental Health & Safet y

U niversity of California, Riverside

900 University Ave

Riverside, CA 92521

www.ehs.ucr.edu

russell.vernon**At_Symbol_Here**ucr.edu

Direct (951) 827-5119

Admin (951) 827-55 28

Fax (951) 827-5122

 

https://www.uctrips-insurance.org

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