Crystal Chemistry of Lead Oxide Hydroxide Nitrates I. The Crystal Structure of [Pb6O4](OH)(NO3)(CO3)

✍ Scribed by Yaping Li; Sergey V. Krivovichev; Peter C. Burns

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 270 KB
• Volume: 153
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.2000.8784

✦ Synopsis

The new lead oxide hydroxide nitrate carbonate, Pb 6 O 4 (NO 3 )(CO 3 ), has been synthesized by hydrothermal methods. The crystal structure has been determined by single-crystal X-ray di4raction and re5ned to R1 ‫؍‬ 0.030. The compound is orthorhombic, space group Pnma, a ‫؍‬ 30.557( 6), b ‫؍‬ 5.809(1), and c ‫؍‬ 7.183(2) A s , V ‫؍‬ 1274.9(5) A s 3 , Z ‫؍‬ 4. The structure consists of (OPb 4 ) oxocentered tetrahedra linked via edges into double [O 2 Pb 3 ] chains running along the b axis. These chains are linked via (OH)Pb 2 dimers into layers parallel to the (100) plane. (NO 3 ) and (CO 3 ) groups are parallel to the (010) plane and are located between the Pb+(O, OH) layers. Pb coordination polyhedra are strongly distorted due to the in6uence of lone-pair electrons. The presence of the nitrate, carbonate, and (OH) ؊ groups has been con5rmed by Fourier transform infrared spectroscopy.