| | 1 | Author
| G. Tams, Hk Miiller-Buschbaum | Requires cookie* | | | Title
| A Contribution to the Crystal Chemistry of Alcaline Alealine Earth Precious Metal Perovskites. Synthesis and Crystal Structure of NaBa4Cuo,5Pti,50 8  | | | | Abstract
| Single crystals of the phase NaBa4Cu0 5P t1 s0 8 were prepared in closed silver tubes. The black and moisture sensitive crystals were investigated by four-circle diffractometer X-ray tech niques. They show trigonal symmetry, space group D2-P321, a = 10.0644, c = 8.3811 A, Z = 3 and belong to the perovskites. The typical M20 9 double octahedra are occupied by Pt4+ and Cu2+ in a different manner. Na+ is partly in and out of the centres of trigonal prisms of oxygen. These features will be discussed with respect | | | |
Reference
| Z. Naturforsch. 49b, 585—588 (1994); eingegangen am 12. Januar 1994 | | | |
Published
| 1994 | | | |
Keywords
| Sodium, Barium, Copper, Platinum, Crystal Structure | | | |
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| default:Reihe_B/49/ZNB-1994-49b-0585.pdf | | | | Identifier
| ZNB-1994-49b-0585 | | | | Volume
| 49 | |
| 2 | Author
| C. U., D. Osterloh, Hk Müller-Buschbaum | Requires cookie* | | | Title
| Das erste Oxocuprat/-Arsenat mit Kupfer in gemischter Valenz | | | | Abstract
| ,56C u o , 4 4) C u (A s 0 4)3 The First O xocuprate/Arsenate Containing Mixed Valent Copper: Cu(Mg2.56Cu0.44)C u(A sO4) 3 Single crystals of Cu(Mg2 56Cu0 44)C u (A s0 4)3 have been prepared by C 0 2-LASER technique and investigated by X-ray diffraction methods. The light blue crystals show monoclinic sym metry, space group C2h-C 2/c, a = 11.897, b = 12.855, c -6.688 A, ß = 113.06°, Z = 4. The structure type is characterized by A s 0 4 tetrahedra, dumb-bell-like coordinated Cu(I), twisted C u 0 4 square polygons and octahedra statistically occupied by Mg/Cu2+. | | | |
Reference
| Z. Naturforsch. 49b, 589—592 (1994); eingegangen am 14. Januar 1994 | | | |
Published
| 1994 | | | |
Keywords
| Magnesium, Copper, Arsenic Oxide, Crystal Structure | | | |
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| default:Reihe_B/49/ZNB-1994-49b-0589.pdf | | | | Identifier
| ZNB-1994-49b-0589 | | | | Volume
| 49 | |
| 3 | Author
| S. Münchau, Hk Müller-Buschbaum | Requires cookie* | | | Title
| Cd0,73 Cu0,27V2 O 6: A Com pound with Brannerite Structure | | | | Abstract
| Single crystals of Cd() 73Cu<,.27V 20 6 were prepared by solid state reactions. X-ray investiga tions lead to monoclinic symmetry, space group C \h-C2lm , a = 9.339, b = 3.5604, c = 6.893 A , ß = 111.85°, Z = 2. It belongs to the Brannerite structure, showing a statistical distribution of Cd2+ and Cu2+ on one point position. The crystal structure of Brannerites is discussed with respect to the distorted O 2-octahedra around V 5+ and the influence of the Jahn-Teller active Cu-+ ion to the shortened M2+Oa octahedra. | | | |
Reference
| Z. Naturforsch. 49b, 927 (1994); eingegangen am 4. März 1994 | | | |
Published
| 1994 | | | |
Keywords
| Cadmium, Copper, Vanadium, Oxide, Brannerite Type | | | |
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| default:Reihe_B/49/ZNB-1994-49b-0927.pdf | | | | Identifier
| ZNB-1994-49b-0927 | | | | Volume
| 49 | |
| 4 | Author
| F.-D Martin, Hk Müller-Buschbaum | Requires cookie* | | | Title
| Synthese und Kristallstruktur von NaM g1?64Cu0 ,36^3^10 Synthesis and Crystal Structure of NaM glt64Cuoi36V 3 0 1o | | | | Abstract
| Single crystals of NaMg] 64Cu().36V 3O 10 have been prepared by heating mixtures of Na2C 0 3, M gC 03, CuO and V 20 5 above the melting point. The yellow crystals show triclinic symmetry, space group Cj-PT, a = 6.726(8), b = 6.743(7), c = 9.625(2) Ä , a = 100.705(9), ß -104.57(1), y = 101.700(9)°, Z = 2. N aM g164Cu0.36V 3O 10 represents a new structure type showing V 3O 10 groups, a statistical distribution of Mg2+ and Cu2+ on two point positions, and N a+ in an irregular coordination. | | | |
Reference
| Z. Naturforsch. 49b, 1329—1333 (1994); eingegangen am 6. Mai 1994 | | | |
Published
| 1994 | | | |
Keywords
| Sodium Magnesium, Copper, Vanadium Oxide, Crystal Structure | | | |
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| default:Reihe_B/49/ZNB-1994-49b-1329.pdf | | | | Identifier
| ZNB-1994-49b-1329 | | | | Volume
| 49 | |
| 6 | Author
| Holger Szillat, Hanskarl Müller-Buschbaum | Requires cookie* | | | Title
| Synthese und Kristallstruktur von KCuHo2Mo40 16 Synthesis and Crystal Structure of K C uH o2M o40 I6 | | | | Abstract
| Single crystals o f K C uH o2M o40 16 have been prepared by recrystallisation from melts and investigated by X-ray diffractometer techniques. The compound crystallizes with m onoclinic symmetry, space group C 2/c, a = 521.6(1), b = 1251.3(2), c = 1953.1(2) pm, ß = 92.903(18)°, Z -4. K C uH o2M o40 16 represents a new structure type characterized by H oO s and alternate CuO6/K O 10 polyhedra chains. The connection o f these polyhedra chains to each other and by M o 0 4 tetrahedra is described and the crystal structure discussed with respect to related com pounds o f the C uLnM o2Os and K L nM o20 8 types. | | | |
Reference
| Z. Naturforsch. 49b, 350 (1994); eingegangen am 10. Dezember 1993 | | | |
Published
| 1994 | | | |
Keywords
| Crystal Structure, Copper, H olm ium, M olybdenum, Potassium | | | |
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| default:Reihe_B/49/ZNB-1994-49b-0350.pdf | | | | Identifier
| ZNB-1994-49b-0350 | | | | Volume
| 49 | |
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