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'Yttrium' in keywords
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2001 (1)
1995 (1)
1980 (1)
1Author    G. Concas, C. Muntoni, G. Spano, M. Bettinelli3, A. Speghini3Requires cookie*
 Title    Mössbauer Investigation of Eu3+ Site Occupancy and Eu-O Covalency in Y20 3 and Gd20 3 Nanocrystals  
 Abstract    Samples of nanocrystalline Yj 8Euo.20 3 and G d18Euo20 3 were examined by 151Eu Mössbauer spectroscopy. The degree of covalency of the E u-0 bond has been studied. The spectrum of the cubic Yj gEuo 20 3 sample has been resolved into 2 contributions due to europium in the C3i and C2 sites, for the first time in 151Eu Mössbauer spectroscopy. The degree of covalency and the electric field gradient of the 2 sites has been compared. The occupancy, by the lanthanide ion, of the more and less symmetric sites in the cubic structure of Yj gEuo 20 3 has been investigated and discussed. 
  Reference    Z. Naturforsch. 56a, 267—272 (2001); received November 11 2000 
  Published    2001 
  Keywords    Europium, Yttrium, Oxides, Nanocrystals, 151Eu Mössbauer Spectroscopy 
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 TEI-XML for    default:Reihe_A/56/ZNA-2001-56a-0267.pdf 
 Identifier    ZNA-2001-56a-0267 
 Volume    56 
2Author    Anne Utzolino, Karsten BluhmRequires cookie*
 Title    Zur Synthese und Kristallstruktur von manganhaltigen Boratoxiden  
 Abstract    M nF e(B 03) 0 und MnAl0,5Yo,5(B03) 0 Synthesis and Crystal Structure of Manganese Borate Oxides: M nFe(B03) 0 and MnAlo.5Yo.5(B 0 3) 0 Single crystals of the compounds M n F e(B 0 3) 0 (I) and MnAlo.5Y o.5(B 03) 0 (II), were obtained by a B20 3 flux technique. I crystallizes with orthorhombic symmetry, space group D ^ -P n m a (Nr.62), a -939.92; b = 319.41; c = 939.11 pm; Z = 4 and II with monoclinic symmetry, space group C2h-P 2 i/n (Nr. 14). a = 325.6; b = 955.1; c = 929.2 pm; ß = 90.70° ; Z = 4. I is isotypic to the mineral Warwickite, while II is a distorded variant of this structure. All metal ions are octahedrally coordinated. Both structures contain isolated, trigonal planar B 0 3 units and oxygen atoms that are not coordinated to boron. 
  Reference    Z. Naturforsch. 50b, 1146—1150 (1995); eingegangen am 5. D ezem ber 1994 
  Published    1995 
  Keywords    Manganese, Iron Aluminium, Yttrium, Borate Oxide, Crystal Structure 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1146.pdf 
 Identifier    ZNB-1995-50b-1146 
 Volume    50 
3Author    Peter Klüfers, Hermann Neumann, Albrecht Mewis, Hans-Uwe SchusterRequires cookie*
 Title    CaAl2Si2-Typ, VIII [1] AB2X2 Compounds with the CaAl2Si2 Structure, VIII [1]  
 Abstract    Thirteen new compounds were synthesized. They are supposed to crystallize with_ the CaAl2Si2 type of structure (space group P3ml) with the following constants: 
  Reference    Z. Naturforsch. 35b, 1317—1318 (1980); eingegangen am 12. Mai 1980 
  Published    1980 
  Keywords    2a-and 2b-Elements, Yttrium, Copper, Rare Earth Elements, Pnictides 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1317_n.pdf 
 Identifier    ZNB-1980-35b-1317_n 
 Volume    35