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  • 1
    Electronic Resource
    Electronic Resource
    Die Kristallstruktur von TlFeSe2 und TlFeS2 (1979)
    Springer
    Monatshefte für Chemie 110 (1979), S. 1045-1055 
    Details
    ISSN: 1434-4475
    Keywords: Chalcogenides ; Crystal structure ; Raguinite ; TlFeS2 ; TlFeSe2
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract TlFeSe2 is monoclinic, space groupC2/m−C 2h 3 ,a=11.973 Å,b=5.490 Å,c=7.110 Å, β=118.2°,Z=4. TlFeS2 is isotypic witha=11.636 Å,b=5.304 Å,c=6.799 Å, β=116.7°. The crystal structure of TlFeSe2 has been determined from single crystal diffractometer data. Isotypy of the sulfide has been confirmed from powder diffraction data. The crystal structure containing infinite linear chains of edgesharing FeX 4-tetrahedra, and its relationship to the thio- and selenoferrates of the alkali metals are discussed. The mineral raguinite is very probably isotypic to synthetic TlFeS2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00910952
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  • 2
    Electronic Resource
    Electronic Resource
    Na3Fe2S4, ein Thioferrat mit gemischt valenter sk∞/1[FeS2]-Kette (1981)
    Springer
    Monatshefte für Chemie 112 (1981), S. 83-89 
    Details
    ISSN: 1434-4475
    Keywords: Chalcogenides ; Na3Fe2S4 ; Thioferrates
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Na3Fe2S4 has been prepared from Na2S, S and Fe. It crystallizes in space group Pnma,a=6.6333 (5) Å,b=10.675 (1) Å,c=10.677 (2) Å,Z=4. The crystal structure, as determined from single crystal four-circle diffractometer data (R=2.8%), consists of sk∞/1[FeS2]-chains formed by slightly distorted edge sharing [FeS4]-tetrahedra, the iron atoms having a formal valency of +2.5. The sodium ions are approximately octahedrally coordinated. Exposed to air, Na3Fe2S4 readily takes up water to form a hydrate by a pertially topochemical reaction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00906245
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  • 3
    Electronic Resource
    Electronic Resource
    Thermogravimetrische Untersuchungen an zeolithischen Erdalkalithioferraten(III) (1980)
    Springer
    Monatshefte für Chemie 111 (1980), S. 475-481 
    Details
    ISSN: 1434-4475
    Keywords: Chalcogenides ; Thermogravimetry ; Zeolitic Hydrates
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The degradation of the hydrates of the alkaline earth thioferratesM(FeS2)2·xH2O,M=Ca, Sr, Ba, resulting from ion exchange on KFeS2, is studied by TG and by X-ray diffraction analysis. The zeolitic character of the very loosely bound water in these compounds is proved. There exist several cristallographically distinct phases as a function of the water content.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00903244
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