Synthesis and Crystal Structure of a Tubular Hydroxyphosphite: Zn11□(HPO3)8(OH)6

✍ Scribed by M.D. Marcos; P. Amoros; A. Le Bail

• Book ID: 102604754
• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 313 KB
• Volume: 107
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1993.1345

✦ Synopsis

(\mathrm{Zn}{11} \square\left(\mathrm{HPO}{3}\right){8}(\mathrm{OH}){6}) is hexagonal, space group (P 6_{3} m c, Z=1, a=12.872(1) \AA, c=4.9772(4) \AA ; R=) 0.030 for 986 reflections from single-crystal (X)-ray diffraction data. This compound is unexpectedly isolypical with (A_{3} \mathrm{Te}{2} \mathrm{O}{6}(\mathrm{OH}){2}(A=\mathrm{Co}). (\mathrm{Ni})) and related to that of dumortierite. It is built up from zigzag (pyroxene-like) octahedra-edge-shared chains which fuse by face-sharing to form double chains. Connection of these double chains by corner sharing of octahedra builds an open tridimensional framework delimiting two kinds of channels running parallel to (c). The smaller channels are occupied by (2 / 8) of the (\mathrm{HPO}{3}) groups. On the walls of the largest tunnels are connected the remaining (\mathrm{HPO}{3}) groups, with their hydrogen atoms pointing toward the tunnel center, forming an unusual infinite chain of empty (\left[\mathrm{H}{6}\right]) octahedra sharing faces along the (c) axis. Comparison with the tellurates and the dumortierite structures is given. 1993 Academic Press. Inc.