Talk:Osmium

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Article changed over to new Wikipedia:WikiProject Elements format by maveric149. Elementbox converted 11:27, 14 July 2005 by Femto (previous revision was that of 22:25, 27 May 2005).

Contents

[edit] Information Sources

Some of the text in this entry was rewritten from Los Alamos National Laboratory - Osmium. Additional text was taken directly from USGS Osmium Statistics and Information, USGS Periodic Table - Osmium, from the Elements database 20001107 (via dict.org), Webster's Revised Unabridged Dictionary (1913) (via dict.org) and WordNet (r) 1.7 (via dict.org). Data for the table were obtained from the sources listed on the subject page and Wikipedia:WikiProject Elements but were reformatted and converted into SI units. Information in the main article concerning the infobox's value of Osmium's bulk modulus -- the value from a (controversial?) 2002 experimental result on osmium's compressibility -- was taken from journal articles by H Cynn et al in Phys. Rev. Lett. (original paper) and by B R Sahu et al in Phys. Rev. B (example of refutation), both of which are cited in full in the main article's References section.

[edit] Talk

[edit] 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)

[edit] 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 [1]

[edit] 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)

i have to do a project on this : (

[edit] Big Error

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

Resources: [2]

[3]

[edit] 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.

[edit] 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)

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