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1990 (2)
1Author    Andreas Eggert, Erwin RiedelRequires cookie*
 Title    Verteilung und Valenz der Kationen in Spinellsystemen mit Eisen und Chrom, I Zur Bildung von FeCr20 4 aus Fe, Fe20 3 und Cr20 3 im Vakuum Distribution and Valence of the Cations in Spinel Systems with Iron and Chromium, I The Form ation of FeCr20 4 from Fe, Fe20 3 and C r20 3 in Vacuum  
 Abstract    The formation o f FeCr20 4 from Fe, Fe20 3 and Cr20 3 in vacuum at 800 °C has been investi­ gated by X-ray diffraction and M össbauer spectroscopy. The reaction mechanism is supposed to include a complicated redox reaction forming the intermediate ferrous com ponents magne­ tite and wüstite, and then a diffusion reaction between wüstite and gas-transported Cr20 3 forming FeCr20 4. 
  Reference    Z. Naturforsch. 45b, 1522—1528 (1990); eingegangen am 18. April 1990 
  Published    1990 
  Keywords    Iron Chromium Spinei, Formation, M össbauer Spectroscopy, X -R ay Spectra 
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 TEI-XML for    default:Reihe_B/45/ZNB-1990-45b-1522.pdf 
 Identifier    ZNB-1990-45b-1522 
 Volume    45 
2Author    Wolfgang Hönle, Leonhard Walz, Hans Georg, Von SchneringRequires cookie*
 Title    Bildung und Kristallstruktur von Ethylendiammonium-hydridotrioxophosphat(2 -) [^ N C F ^ C t^ N F y iP H C ^ p Form ation and Crystal Structure of Ethylenediammonium H ydridotrioxophosphate(2-) [HjNCFUCHoNI-ytPHO,]  
 Abstract    Ethylenediammonium H yd ridotrioxophosphate(2-) [HjNCH-jCH-jNHjJITHO:,] is formed by slow oxidation o f white phosphorus by oxygen in ethylendiamine. It crystallizes in the space group Pbca with a = 1570.6(4) pm, b = 676.9(5) pm, c = 1267.8(4) pm and Z = 8 formula units in the unit cell. The structure is built from ethylenediammonium dications and tetra­ hedral phosphonate dianions, linked by O -H -N bonds (d(O--N) = 275.8 pm). The bond distances are d (P -O) = 151.8 pm, d (P -H) = 136.9 pm, d (N -C) = 148.3 pm and d (C -C) = 151.0 pm. 
  Reference    Z. Naturforsch. 45b, 1251—1254 (1990); eingegangen am 13. Februar 1990 
  Published    1990 
  Keywords    Ethylenediammonium H ydridotrioxophosphate(2-), Crystal Structure, Formation, Phosphonate Dianion, Ethylenediammonium Dication 
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 TEI-XML for    default:Reihe_B/45/ZNB-1990-45b-1251.pdf 
 Identifier    ZNB-1990-45b-1251 
 Volume    45