Crystal Structure and Magnetic Properties of BaCu2(PO4)2 Phosphate

✍ Scribed by A. Moqine; A. Boukhari; J. Darriet

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 207 KB
• Volume: 107
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1993.1359

✦ Synopsis

The crystal structure of (\mathrm{BaCu}{2}\left(\mathrm{PO}{4}\right){2}) has been determined from X-Ray single crystal data. The crystal symmetry is triclinic, space group (P \overline{1}), with unit celt constants (a=9.226(1) \AA, b=9.271(1) \AA, c=) 10.516(1) (\AA, \alpha=106.76(5)^{\circ}, \beta=101.69(5)^{\circ}), and (\gamma=115.70(5)^{\circ}). The structure was solved using 2802 independent reflections (\left(R=0.0411, R{\mathrm{w}}=0.0413\right.) ). The framework corresponds to isolated sheets of mixed (\mathrm{CuO}{5}) and (\mathrm{PO}{4}) polyhedra which are linked by the (\mathrm{Ba}^{2+}) cations. The copper atoms constitute isolated magnetic chains parallel to the [110] direction. The magnetic susceptibility of (\mathrm{BaCu}{2}\left(\mathrm{PO}{4}\right)_{2}) has been interpreted in terms of a one-dimensional magnetic system. 1993 Academic Press, Inc.