In:
Zeitschrift für Naturforschung B, Walter de Gruyter GmbH, Vol. 73, No. 9 ( 2018-09-25), p. 661-667
Abstract:
Microcrystalline powders of LaCl[CO 3 ]·3H 2 O were precipitated and isolated from stoichiometric aqueous solutions of LaCl 3 ·7H 2 O and Na 2 [CO 3 ]·10H 2 O. This confirmed the surprising emergence of corresponding single crystals during a reaction of equimolar aqueous solutions of LaCl 3 ·7H 2 O and Na[N 3 ] under ambient conditions by the uptake of atmospheric CO 2 . According to the X-ray structure analysis of colorless, transparent and rectangular single-crystals, LaCl[CO 3 ]·3H 2 O adopts an orthorhombic structure, space group Pbca with the unit-cell parameters a =856.82(5), b =1598.57(9) and c =967.68(6) pm for Z=8. The tenfold coordination polyhedron around La 3+ consists of two monodentate as well as two bidentate [CO 3 ] 2− anions together with three oxygen atoms from coordinating water molecules and one chloride anion. According to DSC/TG studies and X-ray powder diffraction, LaCl[CO 3 ]·3H 2 O loses first its water and then carbon dioxide under thermal treatment up to 900°C to leave LaOCl behind. Vibrational infrared and Raman spectra confirmed the presence of H 2 O and [CO 3 ] 2− in LaCl[CO 3 ]·3H 2 O and its stepwise degradation at elevated temperatures.
Type of Medium:
Online Resource
ISSN:
1865-7117
,
0932-0776
DOI:
10.1515/znb-2018-0111
Language:
English
Publisher:
Walter de Gruyter GmbH
Publication Date:
2018
detail.hit.zdb_id:
2078109-X
detail.hit.zdb_id:
124635-5
Permalink