Talk:Ammonium hydrosulfide

message: IMHO, this compound does not exist as described, probably.  The pKa of HS- (>14) is such that NH3 is too weak to deprotonate it.  The situation is akin to claims of hydrated Na2S, which are really NaOH-NaSH.  (NH4)2S is probably something like NH4+ SH- co-crystallized with NH3, all held together with extensive H-bonding.--Smokefoot 03:12, 3 April 2006 (UTC)
replies: text: Since I got no response, I plan to move this article to ammonium hydrosulfide.--Smokefoot 18:48, 11 August 2007 (UTC)
thread_title: (NH4)2S is probably fictitious

message: This is my first comment on Wikipedia, so I'm not sure if I'm following the right discussion format here.  But I noticed that the molar mass on this page doesn't match the molecular formula listed.  It does match the second formula, but not the main one listed under "Properties".  I'm basing my comments on these results:
Molar mass of (NH4)SH = 51.1114
according to this page: http://www.formulaweight.com/molarmass/(NH4)SH
Molar mass of (NH4)2S = 68.14192
according to this page: http://www.formulaweight.com/molarmass/(NH4)2S
So if the main molecular formula is listed as H5NS, I think the molar mass should say 51.111 g/mol for that particular formula (CAS number 12124-99-1).
Blueaudio 00:03, 15 October 2007 (UTC)
thread_title:  Molar mass of (NH4)SH vs. (NH4)2S 

message: Needs a safety/hazard section.  RJFJR (talk) 16:33, 25 August 2009 (UTC)
thread_title: Safety

message: Solid state, assuming a crystalline state, is not known from Earth. This would be a mineral species, which - if exists - is yet to be discovered. No rumours about its presence are known. Eudialytos (talk) 23:25, 9 August 2017 (UTC)
thread_title: Solid state on Earth

message: The 71st edition of the CRC Handbook of Physics and Chemistry (1990-1991) (which is the only one I have) lists separate properties for ammonium hydrosulfide (NH4HS), ammonium monosulfide ((NH4)2S), and ammonium pentasulfide ((NH4)2S5) on page 4-45:
Under the section: "Ammonium" in PHYSICAL CONSTANTS OF INORGANIC COMPOUNDS
No. 	Name           	Synonyms and Formulae	Mol. wt.	Crystalline form properties and index of refraction	Density or spec. gravity	Melting point, °C	Boiling point, °C	Cold water	Hot water	Other Solvents
a237	sulfide, hydro-	NH4HS                	51.11   	wh rhomb, 1.74                                     	1.17                    	11819atm         	88.419atm        	128.10    	d        	s al; NH3
a238	sulfide, mono- 	(NH4)2S              	68.14   	col yel cr (> — 18), hygr                          	...                     	d                	...              	v s       	d        	s al; v s NH3
a239	sulfide, penta-	(NH4)2S5             	196.39  	yel pr                                             	...                     	d 115            	...              	v s       	d        	s al, i eth, C22
The last 3 columns refer to "Solubility, in grams per 100 cc". I just couldn't be bothered to figure out how to format it the way they did.
Abbreviations (given on page 4-40):
wh = white
col = colorless
yel = yellow
rhomb = rhombic/orthorhombic (but not rhombohedral)
cr = crystalline
pr = prisms
hyg = hygroscopic (Presumably "hygr" means the same thing.)
d = decomposes
s = soluble
v s = very soluble
i = insoluble
s = soluble
al = alcohol (I suppose this is most likely ethanol.)
eth = ether (I suppose this is most likely diethyl ether)
Based on the other entries in the book, "0" superscript on the solubility of NH4HS in cold water presumably means that the measurement was made at 0°C. Also, I assume that the "19atm" superscript on it's melting and boiling points means that these measurements were taken at 19 atmospheres of pressure rather than atmospheric pressure. I'm not entirely sure what that implies, but it does seem likely that such measurements might be impossible at 1 atm, and high pressures do tend to allow compounds to remain stable at higher temperatures and allow liquid phases to occur in compounds that normally would have no liquid phase. Based on the Wikipedia page, the NH4HS cloud layer on Jupiter is at less than 2 atm, so I doubt that's the reason.
What's more notable is the fact that this seems to say that it boils before it melts at 19atm. That seems wrong, so I'm guessing that either they just accidentally switched the places of these two numbers, or the boiling point is for a solution and melting point is anhydrous or some other sort of crossed hairs with the data sources.
I'm not sure what "> — 18" means, but the "—" was on a line break, so it might just mean that the index of refraction is greater than 18, although that does seem incredibly high to me.
It's pretty clear that this data is all for the anhydrous phases, which is good, since that data is lacking in this Wikipedia article. I just now added the anhydrous appearance data to the info bar on the right, and I'm planning to add the citation as soon as I figure out how to write it. I'd like to incorporate some of the rest of this data if I can figure out how, too. Also, the uncited "boiling point" of 56.6°C, which I'm not sure if is for a solution or not, really bother's me, although I don't have any better data for that at 1 atm, so I probably won't replace it.75.117.222.22 (talk) 05:31, 8 September 2020 (UTC)
thread_title:  Anhydrous Properties