Feito de osmio
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Feito de osmio
Editado pela última vez por almondega em 01 Abr 2005, 22:45, em um total de 1 vez.
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pivA
- Mensagens: 547
- Registrado em: 20 Out 2004, 16:30
- Localização: São Bernardo do Campo - SP
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The metal is lustrous, bluish white, extremely hard, and brittle even at high temperatures. It has the highest melting point and the lowest vapor pressure of the platinum group. The metal is very difficult to fabricate, but the powdered or spongy metal slowly gives off osmium tetroxide, which as a powerful oxidizing agent and has a strong smell. The tetroxide is highly toxic, and boils at 130oC.
The measured densities of iridium and osmium seem to indicate that osmium is slightly more dense than iridium, so osmium has generally been credited with being the heavier element. Calculations of the density from the space lattice which may be more reliable for these elements than actual measurements, however, give a density of 22.65 for iridium compared to 22.661 for osmium. Despite this information, no decision has been made as to which is heavier.
Cost
The price of 99% pure osmium powder - the form usually supplied commercially - is about $100/g, depending on quantity and supplier.
The measured densities of iridium and osmium seem to indicate that osmium is slightly more dense than iridium, so osmium has generally been credited with being the heavier element. Calculations of the density from the space lattice which may be more reliable for these elements than actual measurements, however, give a density of 22.65 for iridium compared to 22.661 for osmium. Despite this information, no decision has been made as to which is heavier.
Cost
The price of 99% pure osmium powder - the form usually supplied commercially - is about $100/g, depending on quantity and supplier.
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Claudio H. Picolo
- Mensagens: 1233
- Registrado em: 07 Dez 2003, 00:53
- Localização: Campinas, SP
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Outro FreeHand "primeirodeabrilzado"???
Com esse já temos FreeHands de ósmio, plutônio, uma "liga" feita com a tabela periódica inteira e até criptonita...
Seguem links para outros FreeHands "exóticos"...
http://ioiobrasil.rednuht.org/viewtopic.php?t=5302
http://ioiobrasil.rednuht.org/viewtopic.php?t=5299
Com esse já temos FreeHands de ósmio, plutônio, uma "liga" feita com a tabela periódica inteira e até criptonita...
Seguem links para outros FreeHands "exóticos"...
http://ioiobrasil.rednuht.org/viewtopic.php?t=5302
http://ioiobrasil.rednuht.org/viewtopic.php?t=5299