Zobrazeno 1 - 10
of 70
pro vyhledávání: '"J.P. Bastide"'
Publikováno v:
Thermochimica Acta. 375:81-84
The standard enthalpies of formation of KCaH3−xFx with x=1, 1.5, 2, 2.5 were determined by calorimetry using their reaction with hydrochloric acid aqueous solution (0.5 M HCl): Δ f H 0 ( KCaH 2 F , cr , 298 K )=−(874±38) kJ mol −1 Δ f H 0 (
Publikováno v:
Materials Research Bulletin. 35:545-549
The direct reaction of hydrogen on a mixture of Na + Mg or NaF + Mg allowed for synthesis of NaMgH3 and NaMgH2F, respectively. Both phases were indexed with an orthorhombic unit cell with dimensions a = 546.34, b = 770.30, c = 541.08 pm for NaMgH3 an
Autor:
A. Bouamrane, Jean-Marie Létoffé, Pierre Claudy, R Lucas, M. Diot, Serge Contreras, J.P. Bastide
Publikováno v:
Thermochimica Acta. 313:75-81
The thermal behavior of dilithium-tetrahydridoberyllate Li 2 BeH 4 has been studied up to 825 K by simultaneous DSC-TGA measurements. A solid–solid transition between the hexagonal phenakite form (Be 2 SiO 4 ) previously described and a possible hi
Publikováno v:
Journal of Thermal Analysis. 47:833-846
The thermal behaviour of complexes [Li+-EC](AlH4)− withEC=12-C-4, 15-C-5, DC 18-C-6 (cis-anti-cis andcis-syn-cis isomers) was investigated by Differential Scanning Calorimetry (DSC). These complexes were prepared as solids from benzene solutions. P
Publikováno v:
Journal of Solid State Chemistry
Journal of Solid State Chemistry, Elsevier, 1996, 123 (1), pp.68-72. ⟨10.1006/jssc.1996.0153⟩
Journal of Solid State Chemistry, Elsevier, 1996, 123 (1), pp.68-72. ⟨10.1006/jssc.1996.0153⟩
Te2O3F2crystallizes with the triclinic symmetry (space groupP-1) and the unit cell parametersa= 515.3(1) pm,b= 625.7(1) pm,c= 688.8(1) pm, α = 98.71(1)°, β = 110.31(1)°, γ = 92.72(1)°,Z= 2. Its structure was solved and refined toRvaluesR1= 0.02
Publikováno v:
Journal of Fluorine Chemistry. 74:141-147
A new non-stoichiometric lead-tellurium oxide fluoride with a disordered anion-excess fluorite-type structure has been synthesized in the solid state and characterized. Its compositional range at 200 °C has been defined within the PbF 2 -TeO 2 -TeF
Publikováno v:
Materials Research Bulletin. 29:351-358
The influence of annealing parameters (temperature and duration) on the crystallization process of vitreous sodium-trimetaphosphate has been studied by X-ray diffraction under air-free conditions. The phenomenon is undoubtly initiated by very small a
Publikováno v:
Thermochimica Acta. 224:97-104
Dulcitol, known in a single crystalline form (hereafter called I), in fact exhibits complex thermal behaviour. A second polymorph II appears when the glassy material is allowed to crystallize at room temperature. This form always coexists with I and
Publikováno v:
ChemInform. 27
PbTeF6 crystallizes with monoclinic symmetry (space group P2 1 c ) and the unit cell parameters a = 462.5(1) pm, b = 1281.2(2) pm, c = 851.9(1) pm, β = 102.36(1)°, Z = 4. Its crystal structure has been solved by a Rietveld analysis of its X-ray pow
Autor:
J.P. Bastide
Publikováno v:
Solid State Communications. 74:355-358
Credible structures for LiBeH3 and Li2BeH4 are described based on a new interpretation of powder-diffraction data given by N.A. Bell and G.E. Coates [J. Chem. Soc. A, 628.(1968)]. Both hydrides have a monoclinic distorted perovskite-type structure re