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  • 11
    Electronic Resource
    Electronic Resource
    Fe2P2O7 and Fe2P4O12 studied between 5–800 K (1990)
    Springer
    Hyperfine interactions 57 (1990), S. 2179-2186 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Mössbauer spectra of triclinic Fe2P2O7 indicate the existence of two crystallographic metal positions in the structure. In the paramagnetic region the two Mössbauer doublets are closely overlapping. The magnetic transition takes place at ≈ 21 K and the saturated fields are around 12 tesla for the two positions. In monoclinic Fe2P4O12 the two octahedrally coordinated metal positions give quite different quadrupole splittings (1.5 and 3 mm/s at room temperature) and hyperfine field values (42 and 12.5 Tesla at 5 K). The transition temperature is at ≈ 18.5 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02405783
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  • 12
    Electronic Resource
    Electronic Resource
    Sulphur Deposition and Damage on Limestone and Sandstone iN Stockholm City Buildings (1999)
    Springer
    Water, air & soil pollution 109 (1999), S. 147-162 
    Details
    ISSN: 1573-2932
    Keywords: car traffic ; city buildings ; exfoliation ; limestone ; pitting ; sandstone ; soiling ; stone damage ; sulphation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract 390 Stockholm city buildings with sculptural decorations, or facades, of limestone or quartzitic sandstone have been investigated. The observed damage has been expressed by digital codes. The chemical analysis was mainly undertaken with SEM/EDS. The study has verified that quartzitic sandstone is more resistant towards weathering than limestone. Coarse-grained limestone with pores and cracks are most weathering-prone. Climatic conditions and air pollution are the major causes of the degradation. The data have been evaluated by means of statistical multivariate analysis. There are significant relationships between car traffic and damage, and between car traffic and soiling, also between observed damage and present degree of sulphation at limestone surfaces. The most common damage is pitting and soiling.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005037617131
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  • 13
    Electronic Resource
    Electronic Resource
    Raman spectra of some MIIV2O6 brannerite-type metavanadates (1987)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 18 (1987), S. 405-407 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The Raman spectra of polycrystalline samples of the metavanadates MIIV2O6 (with M = Ca, Cd, Cu and Mg), belonging to the brannerite structural type, have been recorded. A general assignment, supported by comparisons with known vibrational properties of other oxovanadium species, is proposed. The compounds only give poorly defined IR spectra, which are not useful for the analysis of the vibrational behaviour.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250180606
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