Talk:Silver iodide

Untitled
I heard about AgI being used to seed clouds but I don't think that the structure is anything like ice, quote: "Its use in cloud seeding comes from its resemblance to ice crystals, which is apparent under X-ray crystallography" I'm very certain the second half is wrong - anyone out there to confirm this?HappyVR 11:26, 14 March 2006 (UTC)


 * Having looked more at this it seems there may be some truth to the sentence I removed but it needs clarifying significantly.HappyVR 11:52, 14 March 2006 (UTC)

"The crystalline structure of β-AgI is similar to that of ice, allowing it to induce freezing by the process known as heterogeneous nucleation."

"Heterogeneous Nucleation" is not the cause, it's the observed effect...implicitly related to the crystal structure's similarity to ice; however, without a specific citation explaining otherwise, the crystal structure's similarity to that of ice was indeed the original inspiration for cloud seeding & it worked; however, there is now doubt that the crystalline structure's similarity to ice has really any significance in the formation of ice as we thought it did (Nucleation). Why or how it works is still largely unknown.

So, unless "Heterogeneous Nucleation" is specifically cited or linked to a specific article with substantial explanation, I believe the sentence is at least misleading or disingenuous; at most, completely incorrect. So, either the sentence needs reworked &/or, again, requires a proper source for the specific term "Heterogeneous Nucleation" Omikron.777 (talk) 15:27, 28 August 2019 (UTC)

Temperatures Not Cited
And there's no reference, so I can't check it. —Keenan Pepper 02:20, 28 June 2006 (UTC)

Rainmaking Properties Explained
Could I beg a subject matter expert (or anyone versed on the subject), to add a quick blurb in the main article regarding Silver Iodide's mechanism for 'creating rain'? -- ViaBest 15:12, 16 February 2007 (UTC)

used in ... rainmaking and cloud seeding What kind of rainmaking other than cloud seeding is it used for? Rain dances?--87.162.66.236 18:53, 25 April 2007 (UTC) These kinds of childish articles (distinguishing rainmaking and cloud seeding) illustrate why one should not rely on too much on Wikipedia. --Smokefoot (talk) 20:42, 1 February 2012 (UTC)

I am not sure where to ask this question: it says in this article on Silver Iodide that tons of it are used in 'cloud seeding' every year - which is sprayed into the atmosphere by various methods including planes... BUT then right after that it WARNS: DO NOT come in contact with this chemical - do not breath, do not let it come into contact with skin etc... That seems like a contradiction - if it is sprayed by the TON - are we not being exposed to this ???????? — Preceding unsigned comment added by 75.47.226.73 (talk) 20:49, 22 March 2013 (UTC)

Colour
Appearance: Yellow, crystalline solid Photo: Grey, crystalline solid

Probably explainable if one's a chemist. If not, it is just plain confusing. Olliffe Φ  Obscurity  18:32, 1 February 2012 (UTC)
 * ✅Smokefoot (talk) 20:42, 1 February 2012 (UTC)

Solubility
"Soluble in acid" seems a bit dubious. I just tried cleaning a frit after filtering off some AgI with stock HCl and absolutely nothing dissolved. It might be more appropriate to say "soluble in HI." — Preceding unsigned comment added by 98.101.152.2 (talk) 16:46, 23 May 2018 (UTC)

Photosensitive
From my experiments with silver iodide in direct sunlight or with artificial UV light from a black light I can not get the stuff to decompose to its elemental silver form. Silver chloride and bromide decompose in a matter of seconds when I expose them to UV light. I am no doctorate of science but I disagree with the statement that silver iodide is highly photosensitive sensitive. 2601:281:D880:55C0:683D:4F76:39E3:5093 (talk) 05:18, 26 May 2023 (UTC)
 * As you seem to know, we cant insert personal observations, but such observations certainly are useful in causing reinspection of the article. According to one preparation (Brauer's book, which is cited) "The product (AgI) may be exposed to daylight only when it is completely free of impurities"  So the sensitivity depends on other components.  I also have heard from people in the industry that the photographic emulsions are virtually "black magic" with all sorts of stuff added to influence the film's behavior. You will notice that the specimen of iodargyrite looks nice and golden.  No photosensitivity there.  In any case, I tweaked the wording.--Smokefoot (talk) 12:43, 26 May 2023 (UTC)