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Old 08-24-2017, 05:48 PM
Ron Mynatt Ron Mynatt is online now
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Tellurium

Does anyone know what color Tellurium imparts to glass? This is a payback for help on sodium silicate ."Tellurium is also used to color glass and ceramics and is one of the primary ingredients in blasting caps". Ron
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Old 08-24-2017, 06:45 PM
Ron Mynatt Ron Mynatt is online now
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I checked Coloured Glasses by W.A.Weyl and he had a section on it so I think I have an answer that I can pass on.
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Old 08-27-2017, 09:03 PM
Dave Bross Dave Bross is offline
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Paraphrasing Volf from Chemical approach:

Heavy reduction or it volatilizes.

Coral red under heavy reduction, steel grey if annealed slowly.

Pink to purple-red i phosphate glasses on cooling.
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Old 09-22-2017, 11:47 AM
Bradley Howes Bradley Howes is offline
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Looking at Weyl's book, though he and Smiley were able to produce a purple glass (Glass Science Bull., 1947, 6, 38.), he doesn't consider it "practical'. Under oxidizing conditions, a sodium-barium-aluminum phosphate glass with 1% metallic Tellurium produced the purple glass. He also says it can be considered an analogue of selenium pink, which I believe is colloidal.
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