Reinvestigation of the structure of (ND4)3D(SO4)2 and (NH4)3H(SO4)2 at room temperature

✍ Scribed by I Tamura; Y Noda; Y Morii

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 113 KB
• Volume: 60
• Category: Article
• ISSN: 0022-3697
• DOI: 10.1016/s0022-3697(99)00129-8

✦ Synopsis

The space group of (ND 4 ) 3 D(SO 4 ) 2 and (NH 4 ) 3 H(SO 4 ) 2 was reported in the literature to be A2/a at the room temperature phase. However, several new Bragg reflections which violated the extinction rule of the a-glide symmetry of the space group A2/a were found by neutron scattering experiments. Therefore, the space group of (ND 4 ) 3 D(SO 4 ) 2 and (NH 4 ) 3 H(SO 4 ) 2 at the room temperature was newly determined as A2. Structure analysis of (ND 4 ) 3 D(SO 4 ) 2 was performed by powder neutron diffraction experiments at 293 K based on the space group A2. The deviation from the space group A2/a is mainly due to the distortion of the ND 4 ions.