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'Potassium' in keywords Facet   Publication Year 1995  [X]
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1995[X]
1Author    Z. NaturforschRequires cookie*
 Title    K34[Zn2oIn85]: Eine ternäre Auffüllungsvariante des /?-rhomboedrischen Bors  
 Abstract    In the crystal structure of K34[Zn2()In85] (a = 1827.7(5) pm, c = 3980.5(8) pm, R3m , Nr. 166, Z = 3, R1 = 0.056, wR2 = 0.124) the In and Zn atoms form the /3-rhombohedral boron structure. The structure contains In84 Samson polyhedra, and clusters of 18 In and 10 Zn atoms, forming three In12 icosahedra sharing two common triangular faces. The potassium atoms occupy the centres of truncated tetrahedra -forming the Samson polyhedra -and Kasper polyhedra. 
  Reference    (Z. Naturforsch. 50b, 23 [1995]; eingegangen am 16. Juni 1994) 
  Published    1995 
  Keywords    Crystal Structure, Intermetallic Compound, Potassium, Zinc, Indium 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0023.pdf 
 Identifier    ZNB-1995-50b-0023 
 Volume    50 
2Author    F.-D Martin, Hk Miiller-BuschbaumRequires cookie*
 Title    Ein Beitrag zur Kristallchemie der Alkali-Erdalkalimetall-Oxovanadate: Synthese und Struktur von K3CaV50 15 A Contribution to the Crystal Chemistry of A lkaline-Alkaline-Earth Oxovanadates: Synthesis and Structure of K3CaV50 15  
 Abstract    Single crystals of K3CaV50 15 have been prepared by crystallization from melts. The com ­ pound shows a new structure type with orthorhombic symmetry, space group D ^-C m m a, a = 25.953(5), b = 15.688(3), c = 7.804(4) Ä , Z = 8. Typical features of K3CaV50 15 are isolated cyclic V40 12 and V60 18 groups o f corner sharing V 0 4 tetrahedra. 
  Reference    Z. Naturforsch. 50b, 243 (1995); eingegangen am 13. Septem ber 1994 
  Published    1995 
  Keywords    Potassium, Calcium, Vanadium Oxide, Crystal Structure 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0243.pdf 
 Identifier    ZNB-1995-50b-0243 
 Volume    50 
3Author    H. Szillat, Hk Müller-BuschbaumRequires cookie*
 Title    Uber das Oxomolybdat AgKCu3Mo4Oi6 mit Silber in siebenfacher Koordination About the Oxomolybdate AgKCu3Mo4O i6 with Silver in Seven-Fold Coordination  
 Abstract    Single crystals of AgKCu3Mo40 16 have been prepared by crystallization from melts and investigated by X-ray diffractometer techniques. This compound crystallizes with monoclinic symmetry, space group C |h-P 2 Je, a = 5.056(1), b = 14.546(4), c = 19.858(9) Ä, ß = 86.64(5)°, Z = 4. The crystal structure of AgKCu3Mo40 16 is closely related to K2Cu3Mo40 16 showing ribbons of edge-sharing C u 0 6 and AgÖ7 polyhedra. The ribbons are linked by tetrahedrally coordinated molybdenum and K2O 10 groups. Another kind of M o 0 4 tetrahedra occupies the cavities inside the ribbons. The crystal structure and the coordination of silver, copper, potas­ sium and molybdenum by oxygen are discussed with respect to K2Cu3Mo40 16. 
  Reference    Z. Naturforsch. 50b, 252—256 (1995); eingegangen am 19. September 1994 
  Published    1995 
  Keywords    Crystal Structure, Copper, Silver, Molybdenum, Potassium 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0252.pdf 
 Identifier    ZNB-1995-50b-0252 
 Volume    50 
4Author    Hk Müller-Buschbaum, St GallinatRequires cookie*
 Title    Synthese und Röntgenstrukturanalyse von KCuGd2Mo40 16 und KCuTb2Mo40 16 Synthesis and X-Ray Analysis of KCuGd2Mo4O i6 and KCuTb2Mo40 I6  
 Abstract    Single crystals of the so far unknown compounds KCuGd2M o4O t6 (I) and KCuTb2M o40 16 (II) have been prepared by flux technique. The compounds crystallize with monoclinic sym­ metry. space group C^h-C 2 /c with (I): a = 5.278(2), b = 12.666(5), c = 19.604(14) Ä; ß = 92.76(6)°; (II): a = 5.259(13), b = 12.616(3), c = 19.556(9) A, ß = 92.93(4)°, Z = 4. M olyb­ denum exhibits tetrahedral coordination. The surroundings of copper can be described by distorted tetrahedra, capped by two more distant oxygen atoms, and the rare earth ions show a square antiprism. Potassium is inside an irregular polyhedron. The relationship of the structures o f (I) and (II) is discussed with respect to the KLnMo2Os type compounds. Coulomb term calculations of the lattice energy indicate an oxidation state of copper higher than Cu1. 
  Reference    Z. Naturforsch. 50b, 1794—1798 (1995); eingegangen am 29. Mai 1995 
  Published    1995 
  Keywords    Potassium, Copper Rare Earth Molybdenum Oxide, Crystal Structure 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1794.pdf 
 Identifier    ZNB-1995-50b-1794 
 Volume    50