6108-23-2Relevant academic research and scientific papers
Thermal and spectroscopic study of dehydration of lithium formate monohydrate single-crystals
Mouaine,Becker,Carabatos-Nedelec
, p. 807 - 816 (2008/10/08)
Differential scanning calorimetry (DSC) and thermogravimetric analysis (TG) of lithium formate monohydrate (LiHCOO·H2O) were performed in the temperature range 300-700 K. The DSC/TG measurements show that the dehydration process to anhydrous li
The Polymorphism of Alkali Metal Formates, Part 3. A Raman Spectroscopic, X-Ray and Thermoanalytical Study of the Polymorphism of Lithium Formate
Mueller, Kerstin,Heyns, Anton M.,Range, Klaus-Juergen,Zabel, Manfred
, p. 238 - 246 (2007/10/02)
The crystal structure of anhydrous lithium formate, published recently by Kansikas and Hermansson, is in fact that of a quenchable high-temperature modification (LiHCOO-I).The low-temperature modification LiHCOO-II can be obtained by thermal dehydration of the monohydrate, LiHCOO*H2O, or by drying it over P4O10.LiHCOO-II persists up to 228 deg C, at which temperature it transforms to LiHCOO-I, which in turn is stable up to its melting point at 272 deg C.LiCOO-I is also the modification which crystallizes when a melt of lithium formate is cooled down, in spite of the fact that solidification occurs only at 165 deg C, i.e. at a temperature well within the stability region of LiHCOO-II.The Raman spectra of the different forms of lithium formate are discussed in some detail.Single crystal of LiHCOO-II, obtained by slow evaporation of a saturated solution of anhydrous LiHCOO in absolute methanol, are hexagonal, space group P63, whith a = 14.915(2) Angstroem, c = 5.543(1) Angstroem and Z = 18.All lithium atoms are tetrahedrally coordinated by oxygen.The LiO4 tetrahedra are connected by corner-sharing and by bridging formate groups to form a complicated three dimensional network comprising tunnels running along .No indications for an at least partial occupation of these tunnels have been found.Keywords: Lithium Formate, Polymorphism, Raman Spectra, Crystal Structure
