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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 1321-1328 
    ISSN: 0044-2313
    Keywords: Selenium Ultramarine ; Preparation ; Structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis, Colour, and Structure of a red Selenium UltramarineThe synthesis conditions for a brilliant red selenium ultramarine with pigment properties are reported. Structural and electron-microscopic investigations indicate, that these compounds possess the nosean structure with underoccupied Na+ and anionic positions, which contain the colour-determining species. It is concluded by applying various spectroscopic methods that the colour is generated by Se2- radicals. Hydrothermally grown single crystals were pink, with only very small amounts of Se2- being present, which were distinctly spectroscopically but not structurally detectable.
    Notes: Es wird über die Synthese eines brillant-roten Selen-Ultramarins mit Pigmenteigenschaften berichtet. Strukturelle und elektronenmikroskopische Untersuchungen ergaben, daß die Nosean-Struktur mit unterbesetzter Na+-Lage und einer ebenfalls defizitären anionischen Position, die die farbgebende Spezies enthält, vorliegt. Spektroskopische Messungen deuten darauf, daß die Farbe auf das radikalische Anion Se2- zurückgeht. Hydrothermal gezüchtete Einkristalle sind rosa und enthalten nur sehr geringe Mengen an Se2-, die spektroskopisch deutlich, doch strukturell nicht nachweisbar waren.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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