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  • 1
    Digitale Medien
    Digitale Medien
    Improvements to x-ray diffractometers: Heaters, hygrometry, and thermodifferential and spectra analyses (2001)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 72 (2001), S. 4005-4007 
    Details
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: We describe a newly designed stainless steel door which holds cooling fluids and permits the connection of a set of self-improvements to mechanical supplies, sensors, thermocouples, electronic circuits, and new software to traditional x-ray diffraction chambers. Some compatible analytical routines, at various gas temperatures (from 18 to 200 °C), stem from restricted combinations of stimulation sources to the sample (x irradiation and heating) and the detector sensors (Geiger x-ray diffraction spectra charge coupled devices, humidity, image TV, thermocouples differential thermal analysis installed). Phase transitions of solids can be detected by spectral, structural, geometrical, and thermodifferential methods. © 2001 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1403008
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  • 2
    Digitale Medien
    Digitale Medien
    Cell-Hosted Pyrite Framboids in Fossil Woods (1998)
    Springer
    Naturwissenschaften 85 (1998), S. 78-81 
    Details
    ISSN: 1432-1904
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie , Allgemeine Naturwissenschaft
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s001140050457
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  • 3
    Digitale Medien
    Digitale Medien
    Ultraviolet-blue ionic luminescence of alkali feldspars from bulk and interfaces (1999)
    Springer
    Physics and chemistry of minerals 26 (1999), S. 658-667 
    Details
    ISSN: 1432-2021
    Schlagwort(e): Key words Albite ; aluminosilicate ; thermoluminescence ; self-diffusion ; ionic-diffusion ; interfaces ; ultraviolet emission
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Geologie und Paläontologie , Physik
    Notizen: Abstract Laboratory driven ionic thermal exchange of alkali feldspars from K to Na produces samples which are strongly luminescent in the ultraviolet region near 320 nm. The sites providing this luminescence are suggested as being correlated with the motion of Na atoms along interface-interphases of the material (i.e. with Na-O bond fracture). The thermoluminescence peaks show multi-order kinetics. Thermal preheatings of low albite sensitize the feldspar lattice with respect to thermoluminescence generated by exposure to UV irradiation and heating produces a strong blue luminescence spread over the range 350 nm to 500 nm band in feldspars. The upper temperature for thermoluminescence in feldspars is ∼300 °C, which is also the point where ionic conductivity of albite (010) begins, but the 300 °C region is also the starting point of a large second glow peak in adularia. Whilst it seems appropriate to link the Na motion to the 350–500 nm emission, it is unclear whether these changes are the result of the large anisotropic thermal vibration of Na atoms or the massive Na jumps that occur when the lattice reaches 300 °C. A speculative model is considered in which the UV TL emissions of natural minerals are linked to different interface-interphases (grain boundaries, exsolution limits, twinning planes, antiphase domains). Increased interface coherency energies are related to the kinetic order and the spectral position of luminescence emission peaks.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s002690050231
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  • 4
    Digitale Medien
    Digitale Medien
    The potential use of annealed high-albite (AlSi3O8Na) as an ultraviolet radiation dosimeter (1999)
    Springer
    Journal of materials science 18 (1999), S. 1263-1265 
    Details
    ISSN: 1573-4811
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1006624402943
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