ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 963-968 
    ISSN: 0044-2313
    Keywords: Dysprosium sulfidebromide ; dysprosium sulfideiodide ; crystal structure ; magnetic susceptibility ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: DySBr and DySI - Synthesis, Crystal Structure, and MagnetismBy reaction of Dy2S3 with Dy metal and Br2 (I2) at 750°C (900°C), single phase crystalline DySBr (DySI) has been synthesized. Crystal structure refinement of DySBr confirms the FeOCl-type structure (R = 0.049; space group Pmmn, Z = 2, lattice parameters (in Å): a = 5.349(2), b = 4.079(2), c = 8.066(2)) which is also ascertained for DySI (R = 0.059; lattice parameters (in Å): a = 5.320(2), b = 4.168(1), c = 9.224(5)). The magnetic susceptibilities (temperature range 3.4 K - 295 K) can be described on the basis of simple models (cubic crystal field, molecular field approximation) above 5 K and 15 K respectively. The deviations at low temperature are assumed to be related essentially to Dy - Dy exchange interactions which are not adequately described with the molecular field approach.
    Notes: Durch Reaktion von Dy2S3 mit Dy und Br2 (I2) bei 750°C (900°C) entsteht DySBr (DySI) in phasenreiner, kristalliner Form. Für DySBr bestätigt die Strukturverfeinerung den FeOCl-Typ (R = 0,049; Raumgruppe Pmmn; Z = 2; Gitterkonstanten (in Å): a = 5,349(2), b = 4,079(2), c = 8,066(2)), der auch bei DySI vorliegt (R = 0,059; Gitterkonstanten (in Å): a = 5,320(2), b = 4,168(1), c = 9,224(5)). Die magnetischen Suszeptibilitäten (Temperaturbereich 3,4 K - 295 K) lassen sich oberhalb von 5 K (DySBr) bzw. 15 K (DySI) durch einfache Modelle (oktaedrisches Kristallfeld, Molekularfeldnäherung) beschreiben. Abweichungen unterhalb dieser Temperaturen sind im wesentlichen auf kooperative Effekte zurückzuführen, die in der Molekularfeld-Näherung nicht adäquat beschrieben werden.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...