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The Crystal and Molecular structure of Sodium Magnesium Tris(oxalato)Chromate(Ⅲ) Decahydrate, NaMg$[Cr(ox)_3]{\cdot}10H_2O $

  • Suh, Jung-Sun (Department of Chemistry, Myongji University) ;
  • Shin, Jung-Yup (Department of Chemistry, Myongji University) ;
  • Yoon, Cheon-Ho (Department of Chemistry, Myongji University) ;
  • Lee, Kyu-Wang (Department of Chemistry, Myongji University) ;
  • Suh, Il-Hwan (Department of Physics, Chungnam National University) ;
  • Lee, Jin-Ho (Department of Physics, Chungnam National University) ;
  • Ryu, Bo-Young (Department of Physics, Chungnam National University) ;
  • Lim, Sung-Su (Department of Physics, Chungnam National University)
  • Published : 1994.03.20

Abstract

NaMg[$Cr(C_2O_4)_3]{\cdot}10H_2O$ crystallizes in the trigonal space group P$\bar{3}$c1, with a=b= 16.969(3), c=12.521(3) ${\AA}$, ${\alpha}={\beta}=90^{\circ},\;{\gamma}=120^{\circ},\;{\rho}=1.734 \;gcm^{-3},\;{\mu}=6.46\;cm^{-1}$, Z=6. Intensities for 1062 unique reflections were measured on a four-circle diffractometer with Mo K${\alpha}$ radiation (${\lambda}=0.71069\;{\AA}$). The structure was solved by direct methods and refined to a final ${\omega}$R value of 0.084. X-ray crystal structure showed that magnesium ion appears to be occupied over two sites with the occupancy ratio of 2:1. The crystal possesses 10 water molecules instead of previously estimated 9 water molecules.

Keywords

References

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