X-ray Powder Diffraction Study and Vibrational Spectra of Calcium Cadmium Formate

Autor:	Donka Stoilova, Violeta Z. Vassileva
Rok vydání:	1999
Předmět:	Chemistry Inorganic chemistry Infrared spectroscopy General Chemistry Crystal structure Condensed Matter Physics Bond length Crystallography chemistry.chemical_compound Molecular vibration General Materials Science Formate Isostructural Powder diffraction Monoclinic crystal system
Zdroj:	Crystal Research and Technology. 34:397-401
ISSN:	1521-4079 0232-1300
Popis:	It has been established that the double salt CaCd(HCOO) 4 is isostructural with CuSr(HCOO) 4 . It crystallizes in the monoclinic space group P2/c - C2h 4 with lattice parameters: a = 7.5309(2)A, b = 8.8815(4)A, c = 6.4267(2)A, β = 92.153(2)°, and V = 429.55(3)A. The analysis of the infrared spectra shows that the internal formate modes reflect the existence of two crystallographically inequivalent formate groups in the crystal lattices. The additional split of each formate mode into two components is due to the correlation field splitting. The frequency separations between the asymmetric and symmetric C-O stretching modes (ν 4 -ν 2 ) are explained in terms of different C-O bond lengths within each formate group and the frequency separation of the ν 4 components in terms of different C-O bond lengths of the formate groups.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1d3b71aaf5f462d01bcdae331a795d48 https://doi.org/10.1002/(sici)1521-4079(199903)34:3<397::aid-crat397>3.0.co Zobrazit plný text záznamu Plný text