Crystal structure determination of K₂Zn(PO₃)₄

Abstract

The crystal structure of K 2 Zn(PO 3 ) 4 was determined and refined using the Rietveld method based on the isostructure model of K 2 Cu(PO 3 ) 4 . This compound belongs to the monoclinic system with space group Cc and lattice parameters of a =11.0941(2) Å, b =12.5215(3) Å, c =7.6597(2) Å, and β =102.47(2)°. The chemical formula unit per unit cell is Z =4 and the calculated density is 2.938(3) g∕ cm 3 . Zigzag [PO 3 ] ∞ chains formed along the a axis, and their period contains eight PO 4 tetrahedrons.