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'Ternary Thorium Iron Phosphides' in keywords
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1992 (1)
1Author    JörgH. Albering, W. Olfgang, JeitschkoRequires cookie*
 Title    Preparation and Crystal Structures of Th5Fe19P 12 and ThFe4P2  
 Abstract    The new com pounds Th5F e19P 12 and ThFe4P2 were prepared by reaction o f the elemental components in a tin flux and their crystal structures were determined from single-crystal X-ray data. Th5F e 19P 12 crystallizes with a new m onoclinic structure type: C2/m , a = 2920.3(3), b = 379.18(3), c = 931.48(8) pm, ß = 103.36(1)°, Z = 2, R = 0.031. ThFe4P2 is isotypic with SmNi4P2: Pnnm , a = 1448.9(2), b = 1074.7(2), c = 376.98(4) pm, Z = 6, R = 0.030. Both com ­ pounds belong to the large family o f structures with a m eta l: nonmetal ratio o f exactly or near­ ly 2:1. In these phosphides all phosphorus atom s have nine metal neighbors: six are forming a trigonal prism with three additional neighbors capping the rectangular faces o f the prism. In both structures the thorium atom s have trigonal prismatic or octahedral phosphorus coordi­ nation. M ost iron atoms have the usual tetrahedral phosphorus environment. In addition, the structure o f Th5F e19P l2 has iron atom s in rectangular and distorted square pyramidal phos­ phorus coordination, while the structure o f T hFe4P2 contains iron atom s with only two or three phosphorus neighbors. 
  Reference    Z. Naturforsch. 47b, 1521—1528 (1992); received March 31 1992 
  Published    1992 
  Keywords    Crystal Structure, Tin Flux, Ternary Thorium Iron Phosphides 
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 TEI-XML for    default:Reihe_B/47/ZNB-1992-47b-1521.pdf 
 Identifier    ZNB-1992-47b-1521 
 Volume    47