羟基乙酸钠X射线粉末衍射数据的精确测定与指标化研究

Studies on the Refined X-ray Powder Diffraction Pattern and Indices of Sodium Hydroxyacetate

报道了羟基乙酸钠 X射线衍射数据的精确测定及指标化结果 .羟基乙酸钠为正交晶系 ,空间群为P2 1 2 1 2 ( 1 8) ,晶胞参数 :a=1 .0 581 ( 1 ) nm,b=0 .64 4 0 ( 1 ) nm,c=0 .53 0 3 ( 1 ) nm,V=0 .3 61 3 ( 1 ) nm3,Z=4 ,Dx=1 .80 2 g· cm- 3,Dm=1 .786g·cm- 3,M2 0 =3 8,F30 =51 ( 0 .0 0 88,68) ,F5 9=4 8( 0 .0 0 81 ,1 53 ) .

No diffraction data of Sodium Hydroxyacetate(sodium glycolate) has been reported in X ray powder diffraction files. It is shown that the result of index research of the X ray powder diffraction pattern of sodium hydroxyacetate was refined carefully. The refined unit cell parameters for orthorhombic system of sodium hydroxyacetate are: a =1.058 1(1) nm, b =0.644 0(1) nm, c =0.530 3(1) nm, V =0.361 3(1) nm 3 , Z =4 , D x=1.802 g·cm -3 , D m=1.786 g·cm -3 , F 20 =38, F 30 =51(0.008 8, 68), F 59 =48(0.008 1, 153). Extinction conditions indicate that the space group is P 2 12 12(18). [WT5HZ]