STRUCTURE OF THE HOFMANN CLATHRATES NI(NH3)2NI(CN)4.2C6D6 AND ZN(NH3)2NI(CN)4.2C6H6

Authors
BUTTNER HG KEARLEY GJ HOWARD CJ FILLAUX F
Citation
Hg. Buttner et al., STRUCTURE OF THE HOFMANN CLATHRATES NI(NH3)2NI(CN)4.2C6D6 AND ZN(NH3)2NI(CN)4.2C6H6, Acta crystallographica. Section B, Structural science, 50, 1994, pp. 431-435
Citations number
8
Categorie Soggetti
Crystallography
Journal title
Acta crystallographica. Section B, Structural science → ACNP
ISSN journal
01087681
Volume
50
Year of publication
1994
Part
4
Pages
431 - 435
Database
ISI
SICI code
0108-7681(1994)50:<431:SOTHCN>2.0.ZU;2-U
Abstract
Rietveld analyses of the neutron powder diffraction patterns of Ni(NH3 )2Ni(CN)4.2C6D6 and Zn(NH3)2-Ni(CN)4.2C6H6 have been performed. The sp ace group P4/m is confirmed for Ni(NH3)2-Ni(CN)4.2C6D6 with a = 7.2196 , c = 8.1007 angstrom at 25 K, a = 7.2358, c = 8.3104 angstrom at 300 K. The same space group is found for Zn(NH3)2Ni(CN)4.2C6H6 with a = 7. 3294, c = 8.0722 angstrom at 25 K. The effects of quantum free-rotatio n of the NH3 groups is seen clearly in the temperature factors of the ammine protons.