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NASICON-type Li2.5K0.16Na0.34Cr2(PO4)3

✍ Scribed by Kouass, Salah ;Boughzala, Habib

Book ID: 104484737
Publisher: International Union of Crystallography
Year: 2005
Tongue: English
Weight: 325 KB
Volume: 61
Category: Article
ISSN: 1600-5368
DOI: 10.1107/s1600536805022269

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✦ Synopsis

A new NASICON-type chromium(III) phosphate, K 0.16 Na 0.34 Li 2.5 Cr 2 (PO 4 ) 3 , lithium sodium potassium dichromate tris(phosphate), has been prepared by solid-state reaction. It consists of CrO 6 octahedra and PO 4 tetrahedra sharing corners to form a three-dimensional framework. The monovalent cations are located in the M1 (six-coordinate) and M2 (four-coordinate) sites of the framework. The M1 site is occupied by Na + and K + cations with 69 (3) and 31 (3)% occupancy, respectively. The Li + ions, Li1 and Li2, are split over two M2 sites in general positions, with 60 (2) and 40 (2)% occupancy, respectively. Atom Li2 is disordered around a threefold inversion axis.

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