Diamond

Discussion in 'Chemistry' started by arauca, Oct 11, 2013.

  1. arauca Banned Banned

    Messages:
    4,564
    Diamond been a Crystal ,cam it go trough melting and recrystallizing ?
     
  2. Google AdSense Guest Advertisement



    to hide all adverts.
  3. spidergoat Valued Senior Member

    Messages:
    51,740
    Yes, you can melt it at high temperature and pressure.
     
  4. Google AdSense Guest Advertisement



    to hide all adverts.
  5. arauca Banned Banned

    Messages:
    4,564
    Wow now we get some science.
    Are you saying is going to melt , Hi. Temp. & Pressure . My leading question Ok. it is molten but now I am going to reduce the pressure and reduce tem. solidification will take place . question : will the solid become a diamond or just graphite or solid carbon ?
     
  6. Google AdSense Guest Advertisement



    to hide all adverts.
  7. exchemist Valued Senior Member

    Messages:
    6,298
    Come on Arauca, if you google "carbon phase diagram" you get this in about 15 seconds:

    http://www.google.co.uk/imgres?imgu...a=X&ei=IDRYUtz9O8qJ0AWC6YCACw&ved=0CDEQ9QEwAA
     
  8. arauca Banned Banned

    Messages:
    4,564
  9. Trippy ALEA IACTA EST Staff Member

    Messages:
    10,890
    As with all substances.
     
  10. arauca Banned Banned

    Messages:
    4,564
    I believe you are wrong In a gas system you liquify
     
  11. Read-Only Valued Senior Member

    Messages:
    10,296
    Oh, ye of so little understanding of basic things! That's simply a step away from solidification / crystallization.
     
  12. arauca Banned Banned

    Messages:
    4,564
    I don't understand the bullshit you are pulling . If you are so smart and I so dumb so show to this idiot your wisdom.
     
  13. Read-Only Valued Senior Member

    Messages:
    10,296
    No BS and of course you don't understand. That would require just a tiny bit of scientific knowledge - which you do NOT have. Try reading about phase change or phase transition.

    http://en.wikipedia.org/wiki/Phase_transition

    Be warned - it contains words of more than one syllable, but if you try really hard you might be able to understand some of it.
     
  14. sunshaker Registered Member

    Messages:
    84
    Just thought i would add this periodic table, it is one of the best i have found, there is a temp slider at the top, It tells you what state each element is at different temps, Carbon is the first element to become a solid as temps drop from 6000degrees.
    http://www.ptable.com/
     
  15. Walter L. Wagner Cosmic Truth Seeker Valued Senior Member

    Messages:
    2,520
    great periodic table. thanks for locating that.
     
  16. arauca Banned Banned

    Messages:
    4,564

    At what temperature diamond ignited in air at atmospheric pressure ?
     
  17. Seattle Valued Senior Member

    Messages:
    2,201
    It doesn't melt at our normal atmospheric pressure.
     
  18. arauca Banned Banned

    Messages:
    4,564

    That was settled with the phase diagram at post #4
     
  19. Seattle Valued Senior Member

    Messages:
    2,201
    Don't you have Google? 1500 F or so.
     
  20. KitemanSA Registered Senior Member

    Messages:
    624
    Why should he Google when he can get folks like you to do it for him?
     
  21. arauca Banned Banned

    Messages:
    4,564
    I don't believe that was my objective .
    Does diamond and graphite have the same kindling point then, what is the difference between nuclear grade graphite and does it have the same kindling point as diamond .

    Do you see how well both of you can read mind
     
  22. exchemist Valued Senior Member

    Messages:
    6,298
    I'm not sure your question has a single answer. The temperature at which forms of a solid catch fire depends on their physical form, notably their surface/volume ratio. Powders burn far more readily than slabs of material. Think of iron filings. Coke burns fairly easily, though you have to heat it up quite a bit to get it going. Solid graphite, as used in a nuclear reactor for example, will I'm sure need a lot more heat.

    I don't know where you are going with the idea of diamond, but obviously this could never be used as the moderator in a reactor. Apart from the expense, you can't machine it and it has totally different (far inferior) heat transfer properties.
     
  23. arauca Banned Banned

    Messages:
    4,564
    What are the( optical ) indication that the diamond burns ? or by the same argument graphite
     

Share This Page