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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: picatshou on May 25, 2011, 06:45:53 AM

Title: axis of symmetry of a crystal structure
Post by: picatshou on May 25, 2011, 06:45:53 AM

hi,what is the biggest order of the axis of symmetry for AlP structure ? thanks alot for anyone who can help me :)

Title: Re: axis of symmetry of a crystal structure
Post by: AWK on May 25, 2011, 09:54:23 AM

AlP shows zinc blende lattice at normal pressure

Title: Re: axis of symmetry of a crystal structure
Post by: picatshou on May 25, 2011, 11:57:01 AM

hello,I need to know the biggest order of the axis of symmetry in this structure , can you help me please ? because I have problems i identifying the order of axix , thanks a lot :)

Title: Re: axis of symmetry of a crystal structure
Post by: picatshou on May 25, 2011, 05:00:38 PM

Quote from: picatshou on May 25, 2011, 11:57:01 AM

hello,I need to know the biggest order of the axis of symmetry in this structure , can you help me please ? because I have problems i identifying the order of axix , thanks a lot :) help me pleaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaase friends

Title: Re: axis of symmetry of a crystal structure
Post by: AWK on May 26, 2011, 01:08:52 AM

Look at space group of zinc blende - it contains information you need

Title: Re: axis of symmetry of a crystal structure
Post by: picatshou on May 26, 2011, 11:21:13 AM

hi AWK , i'm sorry but i couldn't found the information concerning axis can you help me friend please ? thank you so much :)

Title: Re: axis of symmetry of a crystal structure
Post by: picatshou on May 27, 2011, 06:17:47 AM

who can help me please thanks :)

Title: Re: axis of symmetry of a crystal structure
Post by: AWK on May 27, 2011, 07:46:22 AM

From wikipedia:
_{The space group of this structure is called F43m}
Symbol of space group contains all information you nedded - these two numbers inform you about the most important axes.

Which show

Quote

the biggest order

- 4 or 3 ?

Title: Re: axis of symmetry of a crystal structure
Post by: picatshou on May 27, 2011, 07:58:31 AM

so that is it I search to know if the biggest order of axis in the structure of AlP is 3 or 4
and thank you very much for help AWK :)

Title: Re: axis of symmetry of a crystal structure
Post by: picatshou on May 27, 2011, 01:35:07 PM

  :'( help me friends  :-[

Title: Re: axis of symmetry of a crystal structure
Post by: AWK on May 30, 2011, 02:30:21 AM

Which number is bigger?