## Experimental Data on [GaAs, GaP, InP and Si]

<jabberwocky><div class="vbmenu_control"><a href="jabberwocky:;" onClick="newWindow=window.open('','usenetCode','toolbar=no,location=no, scrollbars=yes,resizable=yes,status=no,width=650,height=400'); newWindow.document.write('<HTML><HEAD><TITLE>Usenet ASCII</TITLE></HEAD><BODY topmargin=0 leftmargin=0 BGCOLOR=#F1F1F1><table border=0 width=625><td bgcolor=midnightblue><font color=#F1F1F1>This Usenet message\'s original ASCII form: </font></td></tr><tr><td width=449><br><br><font face=courier><UL><PRE>Hi all!\n\nI am in need of some data on the thermal expansion of GaAs, Gap Inp\nand/or Si.\n\nThe end result that I require is a way to very accurately calculate the\nbulk lattice parameter for temperatures between 0 K and 1500 K, which\nmeans I\'ll either need experimental values for the lattice constants, or\nthe linear thermal expansion coefficient.\n\nI have written a crude program to do this for GaAs between 21.6 K and\n1000 K, but this was done based on data read from a graph in an old book\n(very inaccurate).\n\nIf anyone could point me towards some papers (free, since at the moment,\nI don\'t have subscriptions to journals), or if you happen to have any\nraw numbers laying around, that would be great too!\n\nEven if you just have a couple of known points, it could help, so please\npost.\n\nThank you all so much. Cheers!\n\n</UL></PRE></font></td></tr></table></BODY><HTML>');"> <IMG SRC=/images/buttons/ip.gif BORDER=0 ALIGN=CENTER ALT="View this Usenet post in original ASCII form">&nbsp;&nbsp;View this Usenet post in original ASCII form </a></div><P></jabberwocky>Hi all!

I am in need of some data on the thermal expansion of GaAs, Gap Inp
$and/or Si$.

The end result that I require is a way to very accurately calculate the
bulk lattice parameter for temperatures between K and 1500 K, which
means I'll either need experimental values for the lattice constants, or
the linear thermal expansion coefficient.

I have written a crude program to do this for GaAs between 21.6 K and
1000 K, but this was done based on data read from a graph in an old book
(very inaccurate).

If anyone could point me towards some papers (free, since at the moment,
I don't have subscriptions to journals), or if you happen to have any
raw numbers laying around, that would be great too!

Even if you just have a couple of known points, it could help, so please
post.

Thank you all so much. Cheers!

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Timtro wrote: > > Hi all! > > I am in need of some data on the thermal expansion of GaAs, Gap Inp > $and/or Si$. > > The end result that I require is a way to very accurately calculate the > bulk lattice parameter for temperatures between K and 1500 K, which > means I'll either need experimental values for the lattice constants, or > the linear thermal expansion coefficient. > > I have written a crude program to do this for GaAs between 21.6 K and > 1000 K, but this was done based on data read from a graph in an old book > (very inaccurate). > > If anyone could point me towards some papers (free, since at the moment, > I don't have subscriptions to journals), or if you happen to have any > raw numbers laying around, that would be great too! > > Even if you just have a couple of known points, it could help, so please > post. Do you have access to the ICSD database? (Department of Geology or Inorganic Chemistry should have a CD) http://www.fiz-informationsdienste.d...csd/index.html http://journals.iucr.org/ SEARCH option http://www.semiconfareast.com/lattice_constants.htm Tetrahedral structures and phase transitions in III-V semiconductors. Phys. Rev. B $50 8389-8401$ (1994) Coefficient of expansion of gallium arsenide from -62 to 200°C Acta Cryst. 21 290 (1966) Acta Cryst. A48 4-9 (1992) Ultra-high-angle double-crystal X-ray diffractometry (U-HADOX) for determining a change in the lattice Acta Cryst. A60 $33-39$ (2004) Temperature factor of silicon by powder neutron diffractionspacing: experiment Acta Cryst. A46, $435-437$ )1990) Google, Scirus Powder some stuff, stick it in a powder X-ray diffraction rig, and run data vs. temp. -- Uncle Al http://www.mazepath.com/uncleal/ (Toxic URL! Unsafe for children and most mammals) http://www.mazepath.com/uncleal/qz.pdf

 Timtro wrote: > > Hi all! > > I am in need of some data on the thermal expansion of GaAs, Gap Inp > and/or Si. > > The end result that I require is a way to very accurately calculate the > bulk lattice parameter for temperatures between 0 K and 1500 K, which > means I'll either need experimental values for the lattice constants, or > the linear thermal expansion coefficient. > > I have written a crude program to do this for GaAs between 21.6 K and > 1000 K, but this was done based on data read from a graph in an old book > (very inaccurate). > > If anyone could point me towards some papers (free, since at the moment, > I don't have subscriptions to journals), or if you happen to have any > raw numbers laying around, that would be great too! > > Even if you just have a couple of known points, it could help, so please > post. Do you have access to the ICSD database? (Department of Geology or Inorganic Chemistry should have a CD) http://www.fiz-informationsdienste.d...csd/index.html http://journals.iucr.org/ SEARCH option http://www.semiconfareast.com/lattice_constants.htm Tetrahedral structures and phase transitions in III-V semiconductors. Phys. Rev. B 50 8389-8401 (1994) Coefficient of expansion of gallium arsenide from -62 to 200°C Acta Cryst. 21 290 (1966) Acta Cryst. A48 4-9 (1992) Ultra-high-angle double-crystal X-ray diffractometry (U-HADOX) for determining a change in the lattice Acta Cryst. A60 33-39 (2004) Temperature factor of silicon by powder neutron diffractionspacing: experiment Acta Cryst. A46, 435-437 )1990) Google, Scirus Powder some stuff, stick it in a powder X-ray diffraction rig, and run data vs. temp. -- Uncle Al http://www.mazepath.com/uncleal/ (Toxic URL! Unsafe for children and most mammals) http://www.mazepath.com/uncleal/qz.pdf