| | 1 | Author
| Wolfgang Jeitschko, ElkeJ. Reinbold | Requires cookie* | | | Title
| Strukturchemische Untersuchungen an Scandium-Cobalt-Phosphiden mit einem Metall:Phosphor-Verhältnis von 2:1  | | | | Abstract
| Several new scandium cobalt phosphides were prepared by reaction of the elemental compo nents in a tin flux. ScCoP has a TiNiSi-type structure with the orthorhombic lattice constants a = 6.268(2) Ä , b = 3.750(1) Ä , c = 7.050(3) Ä. ScCo5P3 is isotypic with YCo5P3. Its orthorhom bic lattice constants are: a = 11.691(5) Ä , b = 3.583(1) A, c = 10.206(3) Ä. Sc2C o12P7crystallizes with the hexagonal Zr2F e12P7 structure with a = 8.973(3) A , c = 3.531(1) Ä. Sc5C o19P12 is of a new type which is closely related to the structure of Hf2Co4P3. It has hexagonal symmetry, space group P 62m —D 3h and the lattice constants a -12.124(7) Ä , c = 3.633(2) Ä , with Z = 1 formula unit per cell. The structure was determined and refined with isotropic thermal parameters from single-crystal counter data to a residual of R = 0.023 for 848 unique structure factors and 24 variable parameters. Considering the environments of the phosphorus atoms the structures are all closely related. There are, however, considerable differences in the coordination polyhedra of the metal atoms. | | | |
Reference
| Z. Naturforsch. 40b, 900—905 (1985); eingegangen am 26. März 1985 | | | |
Published
| 1985 | | | |
Keywords
| Tin Flux, Crystal Structure, Scandium Cobalt Phosphides | | | |
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| default:Reihe_B/40/ZNB-1985-40b-0900.pdf | | | | Identifier
| ZNB-1985-40b-0900 | | | | Volume
| 40 | |
| 3 | Author
| JörgH. Albering, W. Olfgang, Jeitschko | Requires 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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| default:Reihe_B/47/ZNB-1992-47b-1521.pdf | | | | Identifier
| ZNB-1992-47b-1521 | | | | Volume
| 47 | |
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