Talk:Azurite

message: The chemical composition is correct, but this is even better:
2CuCO3.Cu(OH)2, Basic Copper(II) Carbonate — Preceding unsigned comment added by 193.190.221.254 (talk) 11:53, 2 April 2004 (UTC)
thread_title: Chemical composition

message: I've noticed that on other mineral pages there is a common template.  Could we get that put in here? 169.241.28.71 22:13, 11 October 2006 (UTC)
replies: text: Eventually someone will get to including the template. SauliH 14:59, 22 January 2007 (UTC)
thread_title: Mineral Template

message: The caption underneath the photo of powdered azurite has been edited in an unsatisfactory manner.  It seems there are two threads, one stating that azurite as a pigment will discolor in the air over time, which is true.  The other thread says no, changes in color are the result of how finely the powder is ground.  That is also true, but it is non-sequitur to the first assertion which it claims to refute.  At the time of use the color (with respect to deepness of color, but not hue) is determined by particle-size.  After use, if the painting is not so thoroughly lacquered or laminated as to seal off atmospheric oxygen, the color will become more green in time, just as smelt-blue becomes more black.  This consequence of particle-size is not unique to azurite.  According to a book by Helen Rossitti of Oxford, almost any mineral pigment will, as you grind it finer and finer, become whiter and white, more pastel, as you grind smaller and smaller particles.  Nor can it be ruled out that the grinding processes catalyzes the oxidizing process, so it may also be true that longer grinding makes azurite not only more pastel but more green-tinged as well.64.131.188.104 20:24, 28 April 2007 (UTC)
replies: text: I think I'm the culprit for implying that the pictured powder (notably not protected from weathering in that instance, as would be the case in pigments) showed weathering into malachite. I added that comment on the basis that in my own experience that if I ground small, high-purity synthetic crystals of azurite, the resulting powder would be a lighter shade of blue. This is entirely in keeping with the streak test for azurite, which also gives a light blue result. I never noticed any immediate tendency towards greening for powerdering fresh, pure azurite, although I've certainly notices greening over time of samples left in the open. I will readily bow to anyone with actual experience making preparing pigment mixes, however. Terry Bollinger 03:44, 22 July 2007 (UTC)
thread_title:  Caption under powerdered azurite 

message: Does anyone have any experience with tumbling azurite? I certainly don't. The comments about it taking a "fine polish" and (especially) a "dazzling display of colors" (all blue??) after tumbling both seem a bit off when starting with a soft, all-blue stone. I mellowed the display-of-colors part some, but as I noted, tumbling azurite is not something I every would have tried in the first place, so I can't claim first-hand experience. Anyone? Terry Bollinger 03:27, 22 July 2007 (UTC)
thread_title:  Tumbling Azurite 

message: Hello! This is a note to let the editors of this article know that :File:Azurite, Burra Mine, South Australia.jpg will be appearing as picture of the day on December 1, 2010. You can view and edit the POTD blurb at Template:POTD/2010-12-01. If this article needs any attention or maintenance, it would be preferable if that could be done before its appearance on the Main Page so Wikipedia doesn't look bad. :) Thanks! howcheng  {chat} 19:26, 29 November 2010 (UTC)
thread_title:  [[:File:Azurite, Burra Mine, South Australia.jpg]] to appear as POTD soon 

message: The claim that azurite could be easily synthesized from copper sulphate and sodium carbonate is doubtful since according to http://cool.conservation-us.org/jaic/articles/jaic44-02-004_5.html azurite requires high CO2 pressure and very low copper concentration for its formation. Using sodium bicarbonate would increase the chances of azurite formation but free CO2 would probably be required too.  — Preceding unsigned comment added by 150.227.15.253 (talk) 21:55, 28 October 2012 (UTC)
thread_title: Formation

message: It has been known for half a century that azurite has a phase transition, apparently antiferromagnetic, at about 1.85 degrees Kelvin.  Nothing on this in our Wiki article?  
Here's a paper that describes some other remarkable things about azurite. 
And here is another, which points out its unusually large magnetic-elastic coupling:
https://arxiv.org/pdf/1402.1306.pdf
On another topic, this abstract indicates that the oxygen isotope content of natural azurites is unusual, unless they were formed from the water on meteors.
https://pangea.stanford.edu/research/ODEX/EG/papers/Abs95-3_files/melchiorre.pdf
Physicsjock (talk) 22:37, 15 October 2019 (UTC)
thread_title:  Magnetic Properties 

message: The section of this article devoted to the use of azurite as a pigment contains various details without a clear hierarchy of information. I would suggest keeping this section short and treating the details of azurite pigment in a standalone article. The topic of azurite's use as a pigment is vast (Gettens and Fitzhugh include a bibliography of 30+ sources on it). I have created a short stub on Azurite (pigment). I hope to integrate some of the miscellaneous information from the pigment section of this article. Owunsch (talk) 16:18, 30 December 2022 (UTC)
thread_title:  Pigment 

message: The article says (shortened version) that nickel became so named because its ore looks similar to malachite.  The rationale for this paragraph being in the azurite article is that both malachite and azurite are copper ores.  This seems like a very tenuous link to me.  The material would be better placed in the malachite article which currently has nothing on this. SpinningSpark 16:32, 30 December 2022 (UTC)
thread_title:  Naming of nickel