Anhydrous potassium oxalate, phase II. A vibrational and crystallographic study

✍ Scribed by T.A. Shippey; R. Shirley

• Publisher: Elsevier Science
• Year: 1979
• Tongue: English
• Weight: 237 KB
• Volume: 68
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(79)87240-1

✦ Synopsis

Infrared and Raman studies combined with X-ray polbder diffraction studies show the most probable space group for mhydrous potaaium oualate, phase II. to be Pbam, although Pmma could not be absolutely excluded. Factor gmtip splittings indicate that the centre ofsymmetry is retamed in the site and f;tctorgroups of the oxaWe ion. Improved unit cell and powder results =e reported_ I_ introduction Higashiyama and Hasegawa (HH) [I] carried out a differential thermal anaIysis on potassium oxalate monohydrate. They identified three anhydrous phases. Phase II, stable at room temperature, was found to be orthorhombic with cell dimensions (at 17°C): Q= 10.9, b=6.11, c=3_44w_ The present study combines IR and Raman observations with X-ray powder diffraction studies to obtain further cell and symmetry information 2. ExperimentaI