Talk:Osmium/Archive 1

Query
why are the first few words of the precaution section in red, no other element's are? (86.133.124.162)
 * Remnant of on older style. Removed. Femto 13:08, 6 November 2005 (UTC)

Sources?
The price is as others said greately exaggerated (1000 times!!). Also, i am failing to see any resource that Turkey has the most resources in the world for Osmium. i am having a feeling that this information is injected here (price and location) for a scam. Please correct or erase this false information.

The reserves of Osmium in Turkey and Bulgaria are unveryfied. Where is the citation? According to www.education.jlab.org, osmium and iridium are recovered primarily during the processing of Platinium and nickel ores. Thomas74 09:10, 29 September 2006 (UTC)

There are certainly big mistakes in evaluation of osmium sources. Osmium is one of the rearest elements. The main source of osmium is nickel-copper sulfide ores, which occur mainly in Canada, Cola and Taimyr Peninsulas (Russia), Australia ans South Africa. The Osmium assay in these ores only few ppb. The recovery of osmium is possible due to very high volatility of osmium tetroxide. Also together with other platinum metals osmium accompanies nickel until electrorefining operation, where osmium together with other PGM goes to the slime. Total production of osmium in the world is not more, than 50-60kg. Accordingly osmium reserve in the world is not more,than 1 metric ton. Osmium from nickel ores consists from six stable isotops (184,186,187,188,189,190). But some copper ores are enriched with rhenium, which exists as Re-187 radioactive isotope and slow transform in to Os-187 (Kazachstan). This osmium is recovered as pure isotope Os-187.

Only High importance, not Top?
I'm quite surprised to see that this article's importance rating is only "High", not "Top". If "must-have for a print encyclopedia" is the criterion, I would think that any naturally occurring chemical element would rate "Top" without controversy. Would whoever assigned the "High" importance rating please explain their reasoning?

Neuromath 02:52, 11 December 2006 (UTC)

Pictures of Osmium
I think we need a better picture of Osmium. The included photo doesn't do the metal justice. A picture that shows the beautiful blue cast of the metal would be nice.

-PiccoloNamek

Trust me, that stuff is extremely smelly, and toxic, so they often use it in an alloy if a large object requires its characteristics. AllStarZ 03:48, 13 February 2006 (UTC)

This is a beautiful image

I have a beautiful sample of Osmium metal which I was able to capture in a photograph with the blue color. It has been uploaded and will soon be in this page. (Jdurg 00:39, 18 December 2006 (UTC))

Color consistency
Osmium is referred to as being 4 different colors. In the lead, it is called blue gray and blue black. In the infobox, it is called silver blue. It is also referred to as blue white.

Wtf mate? ^^ --Cryptic C62 · Talk 01:42, 21 March 2007 (UTC)

Wrong word order?
From the article:

"As a strong oxidant, it cross-links lipids by fixing biological membranes in place."

Shouldn't this read: "As a strong oxidant, it fixes biological membranes in place by cross-linking lipids."

It seems that oxidant properties of the compound will result in the chemical change (the cross-linking of the lipids) which will then result in the physical change (fixed membranes). As the article reads now, the cross-linking occurs as a result of the immobilization of the membranes, which is misleading. Unless someone knowledgeable about the topic would like to correct me, I will fix this mistake. --Pyrochem 00:59, 28 April 2007 (UTC)


 * Just be BOLD. Femto 12:35, 28 April 2007 (UTC)

Osmium vs. iridium density
You can find a text on the subject from 1989 here. --Anshelm &#39;77 13:40, 26 October 2007 (UTC)

That is quite interesting. So why don't you edit the osmium article to reflect this information and give the paper as citation?? Plantsurfer 16:22, 26 October 2007 (UTC)

B-class review
I wanted to ask if there is anything more I can do?--Stone (talk) 17:36, 17 October 2008 (UTC)


 * well, the Compounds section is still pitiful. Nice work though. Plantsurfer (talk) 18:23, 17 October 2008 (UTC)


 * Nergaal, you must be psychic! Plantsurfer (talk) 18:26, 17 October 2008 (UTC)

Turkey and Bulgaria
I will delete the wrong info, now! The USGS : ''World resources of PGM are estimated to be 100 million kilograms. U.S. resources are estimated to be 9 million kilograms.'' 100million kilograms are 100 kilo tons or 100,000 tons all the platin metals together. This artikle says :Turkey has 127,000 tons, of Osmium alone Osmium occurence is far less than 10% of Platinum. So I get ride of it.--Stone (talk) 11:44, 16 September 2008 (UTC)
 * The info was added 3 April 2006, which mkes it two and a half years.--Stone (talk) 11:53, 16 September 2008 (UTC)
 * While rare, Osmium does not necessarily bond with any other element, so it is possible for there to be such substantial Osmium reserves in turkey
 * No! No way that there is so much Osmium there in a mineable deposit. If there would be one, Turkey would be the lagest producer of Iridium Osmium and Platinum and somebody would have put it in a science journal a book or the internet.--Stone (talk) 20:56, 29 November 2008 (UTC)

Osmium 187
What is Osmium 187 used for?

why is isotopically pure 187-OS produced at all?

Is it just because pure 187-OS happens to occur in copper ore at Zhezkazgan / Kazakhzstan?

Why do interested parties pay 30,000 .. 60,000 USD (160,000?) per gram for isotopically pure 187-OS?

Best regards, Oscar

Osmium 187 can be used to increase the range and the power of atomic weaponry. AllStarZ 03:49, 13 February 2006 (UTC)


 * http://www.nti.org/e_research/e3_42a.html says otherwise.
 * http://www.milnet.com/nukeweap/Nfaq4-1.html points out that
 * If the precious metals actually had unique capabilities for enhancing the efficiency of fissile material, it might indeed be cost effective to employ them. No one is known to have actually used any of these materials as a fission tamper however.
 * http://www.wmdnews.org/Archives/Sep2002.html mentions:
 * Russian State Duma Security Committee member Viktor Ilyukhin (Communist) told Interfax on 11 Sep. 2002 that theKazakh copper monopoly Kazakhmys illegally producing osmium-187. Osmium-187 is not of any utility in nuclear weapons production and is more often used to gull people into paying excessive sums for radioactive material. There have been recent arrests of people in Moscow, St. Petersburg, and Volgograd wih samples of Osmium 187 in their possession..
 * Many many other hits via google on this subject. For all these reasons, I've removed the statement from the article.  mdf 01:16, 10 March 2006 (UTC)

Os-187 is a naturally occurring isotope of osmium of 1.6% natural abundance. It is not radioactive. Os-187 is the only isotope of Os that has a spin 1/2 and therefore its compounds are suitable for study by nuclear magnetic resonance(NMR)spectroscopy. I was once offered pure Os-187 (i.e., 100%) and would have been interested in purchasing some but as you say it was too expensive. Drosmium Drosmium (talk) 01:15, 28 January 2009 (UTC)http://www.sfu.ca/chemistry/faculty/pomeroy/index.html

Big Error
Osmium priices are grossly exaggerated! its price is abou $100/gram I'm correcting it accordingly

Resources: 



The price of Os(99.8%; 200 mesh) from Alfa (www.alfa.com)is(Jan 30/09): $99.8US for one gram, $397US for 5 grams. 22:17, 30 January 2009 (UTC)Drosmium

There is a big discrepancy between the prices quoted per gramme and per ounce. According to the mid price today, 7 Oct 2010, is $380 per Troy Ounce, not far off the figure in the article, but this is about $12.20 per gramme, not $100. —Preceding unsigned comment added by 81.174.149.61 (talk) 11:00, 7 October 2010 (UTC)

File:Osmium crystals.jpg to appear as POTD soon
Hello! This is a note to let the editors of this article know that File:Osmium crystals.jpg will be appearing as picture of the day on September 27, 2011. You can view and edit the POTD blurb at Template:POTD/2011-09-27. 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} 17:02, 23 September 2011 (UTC)

Densest Isotope: 192Os?
The article at present states:

If one distinguishes different isotopes, then the heaviest ordinary substance would be 192Os.

I haven't seen any source for this, and the mass number (A) for 192Os is 308, while the mass number for 193Ir is 309. (The two nuclei have the same number of neutrons — 116 — and differ in nucleon content only by a single extra proton in 193Ir. Admittedly, density does not vary directly with mass number, but the presence of an extra nucleon in one of two such otherwise very similar atoms should at least raise questions.) If there is a source for the claim that 192Os is the densest isotope, it should be given; otherwise, this claim should be removed.

Also, the term "ordinary substance" is vague, and should be made more precise. Is the article only excluding obviously non-terrestrial materials like the degenerate matter of neutron stars, or would it also exclude highly unstable radioactive isotopes?

Neuromath 20:34, 10 December 2006 (UTC)


 * Sorry, but you've got that wrong: The mass number A of 192Os is 192, and that of 193Ir is 193. Nevertheless, I also have strong doubts about Os being the densest "ordinary substance" (whatever that means), but Ir might well be less dense, because along with the added proton you also get an additional electron. And it is the combination of nuclear charge and electron configuration that determines the density (plus some other factors, such as crystal structure etc.).149.217.1.6 14:02, 28 March 2007 (UTC)


 * I'd certainly expect Os-192 to be the densest elementary substance; the atomic masses of stable Os isotopes vary more than those of Ir, and already the average isotopic mixture of Os is more dense. Atomic mass is proportional to density only for isotopes of a single elements, otherwise uranium and plutonium would be much denser than osmium... --Roentgenium111 (talk) 13:29, 24 May 2012 (UTC)

Toxicity Osmium
the vapor of osmium tetroxide is extraordinarily toxic with MAC as low as 0.002 ppm.

http://www2.ece.jhu.edu/faculty/andreou/WhitakerFacility/Content/LabSafety.pdf http://www.cdc.gov/niosh/npg/npgd0473.html http://www.cdc.gov/niosh/ipcsneng/neng0528.html http://toxnet.nlm.nih.gov/cgi-bin/sis/search/r?dbs+hsdb:@term+@rn+20816-12-0 http://www1.wfubmc.edu/EHS/Chemical+Safety/SOP/Osmium+Tetroxide.htm

- Procedure to neutralize Osmium Tetroxide with corn oil (corn oil is preffered because of its high percentage of unsaturated bonds) and Disposable  nitrile gloves (NOT latex).

http://synapse-web.org/lab/howto/protocols/osmiumtetroxide.stm http://www.emsdiasum.com/microscopy/technical/techtips/osmium_tetroxide.aspx

What is the toxicity of solid osmium. Can objects made of solid osmium be kept and handled safely? How easily does the surface oxidize? Does the metal need to be in powder form to create the dangerous osmium tetra oxide? Eric Thorsgard — Preceding unsigned comment added by 68.235.66.3 (talk) 22:31, 10 July 2012 (UTC)

Lanthanide contraction?
The article attributes osmium's density to the lanthanide contraction, but (1) osmium is not a lanthanide, and (2) the reference for that claim (n.4) nowhere mentions the lanthanide contraction.

Chemistry is not my bag, but it seems that this lanthanide bit is mistaken, or else needs some explaining. --Tbanderson (talk) 20:51, 22 March 2011 (UTC)


 * A book quote might help. --Stone (talk) 21:05, 22 March 2011 (UTC)


 * The fact that the lanthanide atoms decrease in ionic radius as atomic number increases means that Y and Lu have very similar ionic radii despite being one period apart, unlike Y and La (where La3+ is appreciably larger than Y3+). So the transition metal atoms in period 6 (including Os) are smaller than expected (they're about as large as their period 5 transition metal counterparts) but are heavier than their period 5 counterparts, and thus they're denser. Double sharp (talk) 05:34, 11 July 2012 (UTC)

Densest element or densest substance?
Apart from the Osmium/Iridium question, are these only the densest pure elements or also the densest substances (including compounds, mixtures and alloys) at normal Earth conditions? -- 85.182.121.209 12:39, 24 March 2007 (UTC)
 * The neutròn and other exotic "atoms", and individual particula are more dense. -lysdexia 15:38, 12 June 2007 (UTC)
 * Sure, but that's not what I meant. I was talking about substances at normal Earth conditions. If you want me to be more exact, let me add "substances that can exist for more than a tiny fraction of a second" and "substances of which you can have a block that's large enought to be visible to the naked eye." -- 212.63.43.180 17:29, 15 June 2007 (UTC)


 * I've been wondering the same thing. This article mentions that osmium can absorb hydrogen as an interstitial impurity, so I'm wondering if you could make osmium just that little bit more dense by doping it with hydrogen (preferably deuterium). I'm not sure about other possible interstitials, but carbon and boron might work. I don't know if anyone has tried studying such things yet. Stonemason89 (talk) 02:48, 31 July 2010 (UTC)
 * Density is traditionally quoted for purest materials of highest quality (no doping, interstitials, inclusions, voids, etc.), or it would be uncertain. Materialscientist (talk) 02:53, 31 July 2010 (UTC)
 * Of course, but that does not preclude one from measuring the density of such "impure" material, just to determine if it's more dense than pure osmium. (Some transactinide elements are predicted to have a density almost twice as high as osmium; they do exist for several seconds/minutes but visible amounts cannot be created, so they're excluded by the IP's 2nd condition.) --Roentgenium111 (talk) 13:21, 24 May 2012 (UTC)


 * This article claims that an Ir-Os alloy is slightly denser (22.7 g/ccm) than either of the two elements, but I don't know how reliable it is. --Roentgenium111 (talk) 22:15, 16 July 2012 (UTC)

Application
Could one use this in tank armour? - Heaney555z (talk) 17:55, 26 February 2011 (UTC)
 * Only if you want osmium tetroxide slowly killing anyone inside the tank when someone spills their drink. Plus it would shatter, and cost too much. Basically, no. Scientific Alan 2  (Click here to talk)  (What have I done?)  22:12, 5 November 2013 (UTC)

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Need to fix Hardness Units
The hardness is given in a unit that, by itself, does not fully describe how hard the material is(GPa). The author is probably referring to Vickers hardness, but I can't be sure without checking the citations. Unfortunately all of the citations are behind paywalls, so I can't confirm. Can someone with access to the cited articles correct it? Bgovern (talk) 04:49, 22 August 2017 (UTC)