[holytriplem]

Hi,

So I'm a PhD student looking at the formation of clouds in Jupiter's atmosphere. It is usually assumed that the following reaction takes place to form an ammonium hydrosulphide cloud layer at around 2 bars:

H₂S + NH₃ NH₄SH

but I'm looking at the possibility that the following reaction also takes place to produce an ammonium (poly)sulphide cloud layer:

H₂S + NH₃ (NH₄)₂S_x

However, laboratory data is very hard to come by for this reaction, and I can't understand why since it's commonly used to make stink bombs.

I was just wondering if anyone could help me find the correct data, for instance if anyone has managed to perform some kind of experiment on the ratio of (NH₄)₂S to H₂S + NH₃ as a function of temperature, or better yet, if somebody has data on the saturation vapour pressure of (NH₄)₂S at low temperatures (down to at least 200K)? I have tried looking in all the usual places (NIST, JANAF, Handbook of Physics and Chemistry) and I've found nothing so far.

Thanks in advance,

[chenbeier]

Polysulfide you can only get, if sulfur fumes present.

(NH₄)₂S + x S => (NH₄)₂S_(x+1)