[sdpd] structure of Zn2GeO4 reg

[anoop menon <anoopnemom...@yahoo.com>]

hello all
  i am a research student from Cochin University of Science and  ttechnology, Kerala, India. I have some basic doubts regarding the  structure of zinc germenate.
  in the JCPDS card it is given as rhombohedral with space group R-3 but the a,b,c values are given as a=b=14.231 and c=9.53
  but normally rhombohedrals have a=b=c and alpha =beta=gamma not equal to 90.
  why this discrepancy, is it due to any specific reason. please help me  in thei gardssince i am not an expert in crystallographic analysis.
  thankyou  all in advance
  anoop menon
  

  Anoop Menon 
Research Scholar, 
Optoelectronics devices lab, 
Dept. of Physics, 
CUSAT, 
Kochi-22
   
  PH: Mob-9447033331
  visit us on http://physics.cusat.ac.in/oed/lab_oed.htm
  



		
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