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MrHomeScientist
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Those are spectacular colors! How did you make them? Do you have a procedure posted in another thread? I'd like to try this myself.
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vano
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Quote: Originally posted by vano  |
also, cobalt selenite precipitation is a little bit hard than Cu and Ni selenites. I dissolved sodium selenite and cobalt chloride hydrates in hot
water. then I mixed the solution but nothing precipitated, then I poured the mixture into another beaker and there was cold water. then it
precipitated instantly. From my experience, you cant make the compound with a high yield just dissolve compounds in hot or cold water and mix them.
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Hi. this is the procedure.
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vano
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Selenium dioxide.
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vano
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Caesium hexabromoselenite.
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vano
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TITANIUM SELENITE(?)
We know that many compounds of Ti(III) are unstable, for example hydroxide, tungstate... but yesterday i mix some titanium trichloride and sodium
selenite solutions, it is logical to think that titanium can reduce selenite to red selenium in the solution. but when I tried this reaction in a test
tube it wasn't red allotropy.
i made more, then i filtered it and put on petri dish, i can dry it with other methods, but i use sunlight, because if there was any red selenium or
it was red selenium precipitate it must turn black color. onced i tryed to dry red alotropy under sunlight and it takes 30 minute to be black.
unfortunately i couldn't find any info about trivalent selenite.
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woelen
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Maybe the reduction by titanium(III) is so vigorous, that the selenium is reduced all the way down to selenide. That would lead to TiSe2. I don't know
the properties of that.
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vano
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I'm not sure 100% about what it is, These are just my assumptions. bad thing is that I couldn't find any info. so ill put all of my powder in nitric
acid and make some titanium dioxide hydrate. I have TiO2 but you know it's very inert, because of its calcinated temperature. and ill make some Ti(IV)
complexes, just more logical valency to work with.
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clearly_not_atara
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Selenides of titanium may be alloy-like, TiSex, rather than salt-like. Selenium is not terribly electronegative. TiS2 is a conductor IIRC.
[Edited on 04-20-1969 by clearly_not_atara]
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vano
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yes, many possible formulas, selenide, polyselenide, selenite, and different valency of titanium... unfortunately I can't make an analysis now. but
worth to try I think, but I don't recommend it for forum members. I just hate when I have chemical and I don't know exactly what it is. thanks,
everyone for your ideas!
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