| | 1 | Author
| Ch Rabbow, O. Sfreddo, Hk Müller-Buschbaum | Requires cookie* | | | Title
| Uber ein Barium-Lanthanoid-Oxozinkat-Platinat(IV): Ba17Ybi6Zn8Pt40 57 On a Barium Rare Earth Oxozincate-Platinate(IV): B a j 7 Yb 16Z n8Pt40 57  | | | | Abstract
| Reactions of B a C 0 3, ZnO and Yb20 3 mixtures at temperatures up to 1300 °C using plati num crucibles led to yellow needles of B a17Y b 16Zn8Pt40 57. The compound crystallizes with a hitherto unknown tetragonal crystal structure, space group C-4h-I4/m, a = 22.731(1), c = 5.682(1) A , Z = 2. The crystal structure is characterized by P t 0 6 octahedra and tetragonal Z n 0 5 pyramids. Yb3+ shows a mono-capped trigonal prismatic coordination and Ba2+ several different coordination environments (C .N = 9 to 10, by O2"). The relationship to the Ba5Ln8M40 2i type is discussed. | | | |
Reference
| Z. Naturforsch. 51b, 220 (1996); eingegangen am 10. Juli 1995 | | | |
Published
| 1996 | | | |
Keywords
| Barium, Rare Earth, Zinc, Platinum, Crystal Structure | | | |
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| default:Reihe_B/51/ZNB-1996-51b-0220.pdf | | | | Identifier
| ZNB-1996-51b-0220 | | | | Volume
| 51 | |
| 2 | Author
| O. Sfreddo, Ch Rabbow, HkM. Üller-B, Uschbaum | Requires cookie* | | | Title
| Eine neue Verbindung im System Ba/Ln/Zn/Pt/O: Bs^Sn^Zi^PtOis On a New Com pound in the System B a/Ln/Zn/Pt/O : Ba4Sm 4Z n3P tO |5 | | | | Abstract
| Reactions of mixtures of B aC 03, ZnO, Sm20 3 (3:5: 1) heated in platinum crucibles up to 1250 °C led to big black single crystals of Ba4Sm4Zn3P t0 15. The new compound crystallizes with hexagonal symmetry, space group C^-Pö^mc, a = 1 L657, c = 6,789 A , Z = 2. It is isotypic with Ba6Nd2Al4O l5 but shows an ordered Pt4+ and Zn2+ distribution over the aluminium positions. The octahedrally coordinated barium sites of the Ba6Nd2Al40 15 type are occupied by Sm3+. In comparison to compounds of the composition Ba6Ln2M40 15 (M = Al, Fe, Co), Ba4Sm4Zn3PtOi5 is the first example containing different oxidation states at the M '+ positions. | | | |
Reference
| Z. Naturforsch. 51b, 338—342 (1996); eingegangen am 22. August 1995 | | | |
Published
| 1996 | | | |
Keywords
| Barium Rare Earth, Zinc, Platinum, Oxide, Crystal Structure | | | |
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| default:Reihe_B/51/ZNB-1996-51b-0338.pdf | | | | Identifier
| ZNB-1996-51b-0338 | | | | Volume
| 51 | |
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