✦ LIBER ✦

Crystal Structure of Na2ZnP2O7: Reinvestigation

✍ Scribed by I. Belharouak; P. Gravereau; C. Parent; J.P. Chaminade; E. Lebraud; G. Le Flem

Publisher: Elsevier Science
Year: 2000
Tongue: English
Weight: 237 KB
Volume: 152
Category: Article
ISSN: 0022-4596
DOI: 10.1006/jssc.2000.8714

No coin nor oath required. For personal study only.

✦ Synopsis

In the context of a detailed investigation of the luminescent properties of the Na 2؊x Ag x ZnP 2 O 7 compounds, the structure of the pure sodium phosphates was 99revisited.:: The crystal structure of Na 2 ZnP 2 O 7 has been determined by X-ray di4raction using single crystals. A new model explaining the actual large unit cell (a ‫؍‬ b ‫؍‬ 2177.1(3) pm, c ‫؍‬ 1028.5(2) pm, P4 2 /n, Z ‫؍‬ 32) was determined by assuming the existence of twins. The structure is made up of [ZnP 2 O 7 ] layers consisting of corners sharing [P 2 O 7 ] groups and [ZnO 4 ] tetrahedra, and the sodium atoms are located between the layers in 7-or 8-fold coordinated sites. This model is discussed with respect to the crystal chemistry of the monovalent cation zinc phosphate.

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