Talk:Crystallization

message: :Crystallization is more than just a wet chemistry technique.  You or I should look through Special:Whatlinkshere/Crystallization Processes for the topics of interest, and expand the article into something more comprehensive.--Joel 18:07, 10 October 2005 (UTC)
thread_title:  crystallization process principle and operation 

message: I might translate the article on crystallization I made for it.wiki, if this is of interest- in case, let me know here. I would need a colleague chemical engineer to revise my English, probably good but not perfect. UbUb 20:29, 4 April 2006 (UTC)
thread_title:  Revision of the article 

message: I am not a user of en.wiki, so you may probably know better. But merging the articles is tantamount to merging car with engine.--UbUb 06:15, 27 June 2006 (UTC)
replies: text: I'd say no to merging currently. This short article has a focus on crystal chemistry in nature (mineralogy, petrology, meteorology ...) whereas the newly translated (good work UbUb!) crystallizer article focuses on chemical engineering applications. I think there is sufficient info available to significantly expand this article and keep that article with its current focus. --Vsmith 12:13, 27 June 2006 (UTC)
thread_title:  Merging Crystallization and [[Crystallizer]] 

message: There a quite a few articles on aspects of crystals and Crystallization. I wonder to what degree some of these articles could be merged. For example, It seems that crystal growth is quite closely related to Crystallization (engineering aspects) Crystallization (if not the same) and Recrystallization_(chemistry).
:See also:
:Crystallization 
:Crystal growth 
:Recrystallization 
:Crystal
:Crystal structure
:Crystallite
:Fractional crystallization
:Seed crystal
:Single crystal 
:and articles cited therein also!
:I suspect it would take a brave person to try and untangle/merge these articles !! -- Quantockgoblin 13:43, 23 January 2007 (UTC)
replies: text:  Updated above to propose  merger of only three of the most closely related articles, particularly the first two. -- Quantockgoblin (talk) 19:48, 5 October 2009 (UTC)
replies: text: I'm no expert on the topics, so take anything I say with a grain of salt. The article titles and topics seem very closely related, but just glancing through each of them, they currently seem like well established articles that might be difficult to merge. I could be mistaken because of possible overlap. Wizard191 (talk) 20:50, 5 October 2009 (UTC)
replies: text: Technically, all these terms and phenomena (Recrystallization (chemistry), Crystal growth and Crystallization) are rather different. The articles do not fully cover the topics defined by their names, but they are quite different and reasonably developed. I am a specialist in this area and like merging articles, but I would pass here and would not recommend others to merge. I would try to develop (fix) the articles individually and then see what happens - actually long hoping to do that, just can't find time. Materialscientist (talk) 04:22, 7 October 2009 (UTC)

text: If as a result of merging you could rewrite those articles, it would be wonderful and I would help is necessary. All those articles need rewriting anyway. Materialscientist (talk) 11:34, 7 October 2009 (UTC)
thread_title: Proposed merge of [[Recrystallization (chemistry)]] and [[Crystal growth]]

message: The article says that crystalization requires a supersaturated solution.
But crystalization doesn't require a solution at all. If you freeze (nearly) pure water at the correct rate, it crystalizes. If you cool red-hot steel at the correct rate, it develops a crystaline structure. In fact, a lot of crystals are formed from conditions other than supersaturated solutions. 
Is there some other word for this, from a very technical perspective? Is some chemical engineer going to say "being crystaline or crystalization are two completely different things"? If so, then that should be clarified in this article, as well. And if not, then the article shouldn't say you must have a supersaturated solution to make crystals, only that it's ONE way to make them, and then should go on to talk about how and why crystals form when certain substances cool rapidly, et cetera.--Kaz 05:11, 17 July 2006 (UTC)
replies: text: Water freezes at triple point. IMHO, the austenitic structure of steel, for example, is more related to freezing than to crystallization (aren't we talking of solid solutions?), and freezing is an equal-ranking unit process as crystallization is. However, I confess I am not so informed  about metallurgy. Interesting question, though. --UbUb 14:14, 27 August 2006 (UTC)
thread_title:  What about Water and Steel? 

message: # "Crystallization is the (natural or artificial) process of formation of solid crystals from a homogeneous solution".  Errors (?): 
## the "homogeneous pre-condition" is understable only for Chemical's... here on wikipedia we only find that "a solution is a homogeneous mixture of one or more substances (the solutes) dissolved in another substance (the solvent)" on mixture. Need define homogeneous solution. If it is "only 1 solvent and 1 solutes" solution, it is a error. We can mix salt and sugar into the water and growth little salt crystals. Molecules find your similars. — Krauss  29 July 2006 (UTC).
##  "Crystalization doesn't require a solution at all" (Kaz)... yes, not very didactic ... on engineer models we aproximate the concept of solution, "a solid/liquid mixture"... more didactic can be good. — Krauss  29 July 2006 (UTC).
wtf y merge?
Shouldn't it be more general, simply "formation of solid crystals from a non-crystalline phase"? That would include solutions, molten material, amorphous solids..., but exclude recrystallization in the metallurgical or geophysical sense.  --Anastasius zwerg 10:00, 8 October 2007 (UTC)
thread_title:  Conceptual/didactic errors to correct? 

message: The article says:
«Textbook thermodynamics says that melting occurs because the entropy, S,  gain in your system by spatial randomization of the molecules has overcome the enthalpy, H, loss due to breaking the crystal packing forces»
Is it exactly true? I think that a better explanation would be related with free energy, i.e. something like this:
«On the one hand, the crystal packing forces in the solid state yield a low enthalpy, H.
On the other hand, the spatial randomization of the molecules in the liquid state yield a high entropy, S.
But the physical transformations of a system are known to be guided by the minimization of its free energy, F=H-TS (where T is the temperature of this system). Thus, the lower the temperature is, the more the minimization of F relies on the minimization of H, that is, the more solid state is favorised. On the contrary, the higher the temperature is, the more the minimization of F relies on the maximization of S (hence the minimization of -TS), that is, the more the liquid state is favorised. It follows that, for some sharply defined temperature, the entropic factor overcomes the enthalpic factor: the crystal melts.»
88.183.11.75 (talk) 16:02, 10 December 2008 (UTC)
thread_title: Thermodynamic viewpoint

message: This merger was proposed five years ago, but did not occur because it was argued that Crystallization (engineering aspects) was the technical version of Crystallization. Much has changed in the past five years with regards to how articles are organized and I believe the merger should be revisited. According to Wikipedia's policy on article title format, articles should "not use titles suggesting that one article forms part of another". The "(engineering aspects)" portion of the title does just that and demonstrates that these two articles discuss the same topic. For this reason and also because the relevance of crystallization to engineering is already discussed in Crystallization, Crystallization (engineering aspects) should be merged here. Neelix (talk) 21:35, 22 January 2011 (UTC)
replies: text: Support: "Crystallization (engineering aspects)" is a bad lemma, and should be merged into Crystallization. Later, some very detailed sections could be exported into separate articles Cooling crystallization and Evaporative crystallization, with a short summary and a  link in crystallization. -- Marie Poise (talk) 08:37, 23 January 2011 (UTC)
replies: text: Support per the nom. Wizard191 (talk) 19:09, 23 January 2011 (UTC)
thread_title: Merge with [[Crystallization (engineering aspects)]]

message: I've posted an image that represent the artificial crystallization process. I hope that for you it's ok.  — Preceding unsigned comment added by Elisavir (talk • contribs) 11:10, 2 December 2014 (UTC)
replies: text: The image is hard to read and hard to understand for a non-specialist. The article is already overloaded with images. Materialscientist (talk) 11:13, 2 December 2014 (UTC)
thread_title:  Crystallization Process 

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thread_title:  External links modified