| | 1 | Author
| R. Rettich, Hk Müller-Buschbaum | Requires cookie* | | | Title
| Isolierte MnCl6-Oktaeder im Oxohalogeno-Vanadat Ba5(Mg0,4Mn0,6)(V2O7)2MnCl6 Isolated MnCl6 Octahedra in the Oxohalogeno Vanadate Ba5(M g0 4Mn0 6)(V20 7)2MnCl6  | | | | Abstract
| Single crystals o f Ba5(M g0 4Mn0 6)(V20 7)2MnCl6 have been prepared by solid state reactions of M g C 0 3, Mn20 3, V20<i and BaCl2 -2H20 below the melting point of BaCl2. The new vanadium oxide chloride crystallizesowith monoclinic symmetry, space group C2h-P2/c, a = 13.345(4), b = 5.711(2), c = 15.859(4) Ä, ß = 113.69(2)°, Z = 2. Special features of the crystal structure are isolated MnCl6 octahedra and layers created by divanadat groups and (M g,M n)06 octahedra. The ^ [(Mg,Mn)V20 7] nets of Ba5(Mg0 4Mn0 6)(V20 7)2MnCl6 are discussed with respect to other oxohalogeno vanadates containing divanadate groups. | | | |
Reference
| Z. Naturforsch. 52b, 457—461 (1997); eingegangen am 15. Januar 1997 | | | |
Published
| 1997 | | | |
Keywords
| Barium, Magnesium, Manganese, Chlorine, Vanadium Oxide | | | |
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| default:Reihe_B/52/ZNB-1997-52b-0457.pdf | | | | Identifier
| ZNB-1997-52b-0457 | | | | Volume
| 52 | |
| 2 | Author
| R. Rettich, Hk Müller-Buschbaum | Requires cookie* | | | Title
| Ein [Ba(Ca,Mn)06]-Gerüst mit eingelagerten V-O-V-Gruppen in der Kristallstruktur von Ba(Ca0,6Mn0,4)V20 7 A [Ba(Ca,Mn)06] Framework with Incorporated V-O-V Groups in the Crystal Structure of Ba(CaQ 6Mn0 4)V20 | | | | Abstract
| Single crystals of Ba(Ca<).6Mn0 4)V20 7 have been prepared by crystallization from melts. X-ray investigations revealed a new quaternary vanadium oxide of the type BaMV20 7. The M positions are occupied statistically by Ca2+ and Mn2+. The compound crystallizes wi|h orthorhombic symmetry, space group D^-Pnma, a = 15.429(2), b -5.7005(12), c = 7.364(2) A, Z = 4. The crystal structure can be interpreted as a [Ba(Ca,Mn)06] network with incorporated V-O-V groups. Considering the nearest O2-neighbours of the incorporated vanadium, the V-O-V groups are complemented to give V20 7 divanadate units. Ba(Ca« 6Mn0 4)V20 7 is isotypic to BaMV20 7 (M=Ca,Cd) but not to BaMnV20 7. | | | |
Reference
| Z. Naturforsch. 52b, 785—789 (1997); eingegangen am 14. April 1997 | | | |
Published
| 1997 | | | |
Keywords
| Barium, Calcium, Manganese, Vanadium Oxide, Crystal Structure | | | |
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| default:Reihe_B/52/ZNB-1997-52b-0785.pdf | | | | Identifier
| ZNB-1997-52b-0785 | | | | Volume
| 52 | |
| 3 | Author
| AnjaL. Oose, W. Illiam, S. Sheldrick | Requires cookie* | | | Title
| Quaternary Selenidogermanates(IV) A3[AgGe4Se10]*2H2O and A2[MnGe4Se10]*3H2O (A = Rb, Cs) with Open Framework Structures | | | | Abstract
| Hydrothermal reaction of Ge and Se with Ag(CH3COO) in the presence of alkali metal carbonates affords the open framework selenidogermanates(IV) A^fAgGejSeiol ^H^O (A = Rb, Cs), 1 and 2, which contain corner linked adamantane-like Ge4Seio cages and AgSe4 tetrahedra. The analogous reaction with Mn(CHiCOO)2 yields the isostructural tetragonal compounds A2[MnGe4Seio]-3 H2 0 (A = Rb, Cs), 3 and 4. The cations are sited at a general position in the channels of the silver bridged anionic framework of 1 and 2 and exhibit a disordered pattern of occupation (s.o.f. = 0.75) with one of the two crystallographically independent water oxygen atoms 0 (2) (s.o.f. = 0.25). In contrast, the Rb+ cations in 3 are disordered over all three cation/oxygen sites, and the cation/water occupation pattern is fully reversed for the larger Cs+ cations in 4 in comparison to 1 and 2. | | | |
Reference
| Z. Naturforsch. 52b, 687—692 (1997); received March 13 1997 | | | |
Published
| 1997 | | | |
Keywords
| Selenidogermanates(IV), Silver, Manganese, Hydrothermal Synthesis, Framework Structure | | | |
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| default:Reihe_B/52/ZNB-1997-52b-0687.pdf | | | | Identifier
| ZNB-1997-52b-0687 | | | | Volume
| 52 | |
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