THE CRYSTAL-STRUCTURES OF THE WEBERITES N A2CUSCF7 AND NA2ZNALF7

Authors
DAHLKE P BABEL D
Citation
P. Dahlke et D. Babel, THE CRYSTAL-STRUCTURES OF THE WEBERITES N A2CUSCF7 AND NA2ZNALF7, Zeitschrift fur anorganische und allgemeine Chemie, 620(10), 1994, pp. 1692-1697
Citations number
28
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Zeitschrift fur anorganische und allgemeine Chemie
ISSN journal
00442313 → ACNP
Volume
620
Issue
10
Year of publication
1994
Pages
1692 - 1697
Database
ISI
SICI code
0044-2313(1994)620:10<1692:TCOTWN>2.0.ZU;2-R
Abstract
At single crystals of the orthorhombic weberites Na2CuScF7 (Pmnb, Z = 4) and Na2ZnAlF7 (Imma, Z = 4) X-ray structure determinations were per formed. Na2CuScF7 (Na2ZnAlF7): a = 726.0 (709.2), b = 1053.4 (1009.2), c = 765.8 (733.7) pm; R1 = 0.030 (0.042) for 887 (363) observed and i ndependent reflections. The resulting average distances of the octahed rally coordinated metal atoms are: Cu-F = 200.7 pm, Sc-F = 201.7 pm; Z n-F = 198.8 pm, Al-F = 180.1 pm. Some structural relations and the var iation in the bridge angles of the corner-sharing octahedra are discus sed.