| | 1 | Author
| Schaffrath, R. Gruehn | Requires cookie* | | | Title
| U  | | | | Abstract
| Single crystals of the new oxochlorotantalate Nd 7 , 1 Ta 8 0 2H Cl f , could be obtained only by chemical transport reactions (T 2 —» T,; T 2 — 1000 °C, T, = 900 °C) with mixtures of Cl 2 /TaCl 5 as transport agent. NdTa0 4 was chosen as the starting material. A direct preparative route to Nd 7 ,,Ta s 0 2x Cl(, from binary and ternary components, however, was not successful. Nd 7 33 Ta H Oi x Clf, crystallizes in the space group Cmmm with a = 10.3381(8) Ä, b = 18.865(1) A, c — 3.9152(3) A; Z = 1. The structure was refined to R — 4.42%, R w = 2.76%. Main building units are pairs of edge-sharing Ta0 6 -octahedra which are connected with threefold capped trigonal prisms around Nd. Especially remarkable is one Nd position with an occupation factor of 0.833. The relationship of this new structure type with Nd 2 Ta 2 0 7 Cl 2 is considered. Furthermore, we have measured the magnetic susceptibilities of both Nd-compounds in a temperature range from 3,6 to 251,3 K. The results are compared with calculated data. | | | |
Reference
| Z. Naturforsch. 43b, 1567—1574 (1988); eingegangen am 7. Juli 1988 | | | |
Published
| 1988 | | | |
Keywords
| Oxochlorotantalates, Thermal Decomposition, Preparation, Chemical Transport Crystal Structure | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/43/ZNB-1988-43b-1567.pdf | | | | Identifier
| ZNB-1988-43b-1567 | | | | Volume
| 43 | |
|
