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  • ternary lanthanide chlorides  (2)
  • Solid state detectors
  • 1
    Electronic Resource
    Electronic Resource
    Retarded solid state reactions III [1] (1997)
    Springer
    Journal of thermal analysis and calorimetry 49 (1997), S. 1207-1210 
    Details
    ISSN: 1572-8943
    Keywords: metastable states ; reconstructive phase transitions ; ternary lanthanide chlorides ; thermal hysteresis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Solid state reactions and reconstructive phase transitions exhibit more or less a large hysteresis between reaction temperatures taken from DTA-heating and -cooling curves. For ternary lanthanide chlorides the equilibrium temperatures could be obtained bye.m.f.-measurements in galvanic chlorine cells for solid electrolytes usingA +-ion (A=alkaline metal) conducting diaphragms. By quenching, high-temperature phases can often be transformed to metastable room-temperature phases. In this case the equilibrium state must be established by annealing at sufficiently high temperature, or it must be tried to synthesize the compound in its stability range from suitable precursor systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01983676
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Interaction of Thulium, Ytterbium(III) and Lutetium Chlorides with Sodium Chloride (1999)
    Springer
    Journal of thermal analysis and calorimetry 57 (1999), S. 203-208 
    Details
    ISSN: 1572-8943
    Keywords: crystal structures ; phase diagrams ; ternary lanthanide chlorides ; thermodynamic properties
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The pseudobinary systems NaCl—LnCl3 (Ln=Tm, Yb, Lu) were investigated by DTA and X-ray diffraction. Two types of ternary chlorides exist: congruently melting compounds Na3LnCl6 with the cryolite-structure, incongruently melting compounds NaLnCl4 with the NaErCl4-Ln (Ln=Tm) or the NaLnCl4-structure (Ln=Yb, Lu). All these structure types contain [LnCl6]-octahedra. By solution calorimetry and e.m.f. measurements in galvanic cells for solid electrolytes could be proved that all compounds are formed from NaCl and LnCl3 by gain in lattice enthalpy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010115407242
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  • 3
    Electronic Resource
    Electronic Resource
    First results from the TGRS high-resolution GRB Spectrometer (1995)
    Springer
    Astrophysics and space science 231 (1995), S. 161-164 
    Details
    ISSN: 1572-946X
    Keywords: GRBs ; High resolution spectroscopy ; Solid state detectors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The Transient Gamma Ray Spectrometer (TGRS) is a 215 cm3 passivelycooled germanium detector designed primarily to study spectral features of gamma ray bursts. Since shortly after its launch on 1994 Nov. 1 it has been producing high-resolution spectra of GRBs and solar flares. Some of these spectra are presented here. Although it has not yet detected any line features in GRBs-none were expected so early in the mission-several bursts have been seen simultaneously by TGRS, the Konus instruments on the same spacecraft, and the BATSE instrument on Compton GRO. A comparison of the spectra obtained by these various instruments, as presented here, may resolve the question of whether line features actually exist, and if so provide detailed spectroscopy to determine their physical origin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00658608
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