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1Author    Pb2ln2si209, J.-P Werner, Hk Müller-BuschbaumRequires cookie*
 Title    Zur Kenntnis eines synthetischen Kentrolits/Melanotekits des Indiums: On an Synthetic Kentrolite/Melanotekite of Indium: Pb2In2Si20 9  
 Abstract    Single crystals of Pb2In2Si20 9 have been prepared by crystallisation from melts of Pb(N 03)2, ln20 3 and S i0 2. The compound crystallizes with orthorhombic symmetry, space group C2v-Pna2| with the lattice constants a = 10.529(1),/?= 11.372(1) and c = 7.019(3) A, Z = 4. Despite the fact that the Kentrolite/Melanotekite structure is characterized by dissimilar occupied split positions of lead, Pb2In2Si20 9 shows completely filled and ordered point positions. The location of a dot like lone pair of Pb~+ is estimated by Coulomb term calculations of lattice energy. The results are discussed with respect to published Pb-lone pair distances using the electronic polarizability coefficient of the lone pair cation or simple geometrical considerations. 
  Reference    Z. Naturforsch. 52b, 1213—1218 (1997); eingegangen am 8. Juli 1997 
  Published    1997 
  Keywords    Lead, Indium, Silicate, Crystal Structure 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-1213.pdf 
 Identifier    ZNB-1997-52b-1213 
 Volume    52