| | 1 | Author
| J. Feldmann, Hk Miiller-Buschbaum | Requires cookie* | | | Title
| Kristallstrukturuntersuchung an einem Strontium-Vanadyl-Vanadat: Sr2(V 0 )V 20 8 Crystal Structure Investigation of the Strontium Vanadyl-Vanadate: Sr2( V 0 ) V 20 8  | | | | Abstract
| Single crystals of Sr2(V 0)V 20 8 have been prepared by quenching melts from higher tem peratures. This compound represents a new structure type and crystallizes with monoclinic symmetry, space group C |h-I 2 la, a = 6.929, b = 16.246, c = 7.260 A, ß = 115.82°, Z = 4. The point positions occupied by V5+ show tetrahedral coordination. The refinement of the V4+ position led to split positions with acentric orientations of V4+ in the octahedral O2-surrounding. It results in a square pyramidal coordination with one short V -O distance typically for vanadyl groups. | | | |
Reference
| (Z. Naturforsch. 50b, 43—46 [1995]; eingegangen am 8. Juli 1994) | | | |
Published
| 1995 | | | |
Keywords
| Strontium, Vanadium Oxide, Crystal Structure | | | |
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| default:Reihe_B/50/ZNB-1995-50b-0043.pdf | | | | Identifier
| ZNB-1995-50b-0043 | | | | Volume
| 50 | |
| 2 | Author
| Z. Naturforsch | Requires cookie* | | | Title
| Ag+ als Substituent eines Alkalimetalls in Ag2SrMnV20 8 | | | | Abstract
| Single crystals of Ag2 SrM nV20 8 have been prepared by reactions of metallic silver and a mixture of S rC 0 3, M nC 03 HoO and V ?0 5. X-Ray investigations showed monoclinic symmetry, space group Cfh-C2/c, a = 9.7022(9), b = 5.5882(5), c = 13.894(1), ß = 90.41(1)°, Z = 4. The crystal structure is isotypic to N a2BaCuV20 8 and includes V 0 4 tetrahedra, M n 0 6 octahedra as well as irregular A g 0 8 and S rO !0 polyhedra. Ag2SrM nV20 8 is characterized by a [MnV20 8] network incorporating Ag+ and S r + or a [Ag2V 2Ö 8] frame incorporating Mn2+ and Sr2+ ions. Ag+ is able to replace an alkali ion in the cationic part of the crystal structure. | | | |
Reference
| Z. Naturforsch. 53b, 279—282 (1998); eingegangen am 17. November 1997 | | | |
Published
| 1998 | | | |
Keywords
| Silver, Strontium, Manganese, Vanadium Oxide | | | |
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| default:Reihe_B/53/ZNB-1998-53b-0279.pdf | | | | Identifier
| ZNB-1998-53b-0279 | | | | Volume
| 53 | |
| 3 | 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 | |
| 4 | Author
| D. Frerichs, Hk Müller-Buschbaum | Requires cookie* | | | Title
| Ein Beitrag zur Kristallchemie von Verbindungen mit Johillerit-Struktur: On the Crystal Chemistry of Compounds with Johillerite Structure: KCo3 Cu(As2 5 8 V0 4 2 )O i2 | | | | Abstract
| Single crystals of KCo3Cu(As2.58Vo42) 0 12 were prepared by solid state reactions below the melting point of the reaction mixture (K 2C 0 3, CuO, CoC20 4, V 20 5 and 3 A s20 5 -5 H 20) . It crystallizes with m onoclinic symmetry, space group C |h-C 2 lc, a = 12.207, b = 12.730, c = 6.811 A , ß = 113.69°, Z -4. The structure type is characterized by isolated twisted-square C u 0 4-polygons, C o 0 6-octahedra and a special 4+4-coordination o f the potassium ion. A s5+ and V*+ are in tetrahedral coordination with a partly statistical distribution of these ions. | | | |
Reference
| Z. Naturforsch. 49b, 1463—1466 (1994); eingegangen am 13. Juni 1994 | | | |
Published
| 1994 | | | |
Keywords
| Potassium, Cobalt, Arsenic, Vanadium Oxide, Crystal Structure | | | |
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| default:Reihe_B/49/ZNB-1994-49b-1463.pdf | | | | Identifier
| ZNB-1994-49b-1463 | | | | Volume
| 49 | |
| 5 | Author
| F.-D Martin, Hk Miiller-Buschbaum | Requires cookie* | | | Title
| Ein Beitrag zur Kristallchemie der Alkali-Erdalkalimetall-Oxovanadate: Synthese und Struktur von K3CaV50 15 A Contribution to the Crystal Chemistry of A lkaline-Alkaline-Earth Oxovanadates: Synthesis and Structure of K3CaV50 15 | | | | Abstract
| Single crystals of K3CaV50 15 have been prepared by crystallization from melts. The com pound shows a new structure type with orthorhombic symmetry, space group D ^-C m m a, a = 25.953(5), b = 15.688(3), c = 7.804(4) Ä , Z = 8. Typical features of K3CaV50 15 are isolated cyclic V40 12 and V60 18 groups o f corner sharing V 0 4 tetrahedra. | | | |
Reference
| Z. Naturforsch. 50b, 243 (1995); eingegangen am 13. Septem ber 1994 | | | |
Published
| 1995 | | | |
Keywords
| Potassium, Calcium, Vanadium Oxide, Crystal Structure | | | |
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| default:Reihe_B/50/ZNB-1995-50b-0243.pdf | | | | Identifier
| ZNB-1995-50b-0243 | | | | Volume
| 50 | |
| 7 | Author
| V- | Requires cookie* | | | Title
| Zwei monokline Kupfer-Oxovanadate des Magnesiums mit geordneter Metallverteilung: /w-Mg2CuV20 8 und MgCu2V20 8. Ein Beitrag zur Dimorphie von Mg2CuV2Os Two Monoclinic Copper Oxovanadates of Magnesium Showing Ordered Metal Distribution: m-Mg9CuV-,08 and MgCu | | | | Abstract
| Single crystals of ra-Mg2CuV20 8 (I) and MgCu2V20 8 (II) have been prepared by solid state reactions. The orange (I) and dark red (II) crystals show monoclinic symmetry, space group C2h -P2,/c, (I): a = 6.167(3), b = 8.172(5), c = 6.400(8) Ä, ß = 116.22(3)°, Z = 2; (II): a = 6.453(1), b = 8.342(2), c = 11.517(2) Ä, ß = 90.44(2), Z = 4. Both compounds show ordered metal distributions and vanadium in tetrahedral coordination by oxygen. (I) is characterized by elongated C u06 octahedra and (II) by trigonal C u 0 5 bipyramids. ra-Mg2CuV20 8 is the low temperature form of the formerly investigated orthorhombic o-Mg2CuV2Ö8. Calculations of the Coulomb parts of the lattice energy of the two crystal forms are discussed. | | | |
Reference
| Z. Naturforsch. 51b, 817—821 (1996); eingegangen am 4. Dezember 1995 | | | |
Published
| 1996 | | | |
Keywords
| Magnesium, Copper, Vanadium Oxide, Crystal Structure | | | |
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| default:Reihe_B/51/ZNB-1996-51b-0817.pdf | | | | Identifier
| ZNB-1996-51b-0817 | | | | Volume
| 51 | |
| 8 | 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 | |
| 9 | 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 | |
| 10 | Author
| B. Mertens, Hk Müller-Buschbaum | Requires cookie* | | | Title
| Uber ein cadmiumreiches Orthovanadat Ba2,5Cd11(V 04)9 mit Cadmium in oktaedrischer und tetragonal pyramidaler Koordination On a Cadmium Rich Orthovanadate Ba-, 3Cd, |( V 0 4)9 Showing Cadmium in Octahedral and Square Pyramidal Coordination | | | | Abstract
| Single crystals of Ba2 ^C di^V O ^g have been prepared by solid state reactions. The new compound crystallizes with orthorhombic symmetry, space group D ^-Pbcn, a = 20.842(6), b = 13.471(3), c = 11.838(9) A, Z = 4. The crystal structure is characterized and dominated by C d 0 6 octahedra and unusual square pyramids of 0 2~ around Cd2+ forming a three-dimensional [C d ]|0 36] network. The interstices are occupied by V 5+ and Ba2+ ions. This results in V 0 4 tetrahedra and irregular BaO 10 polyhedra isolated from each other. Occupation of the barium positions is deficient in agreement with the valence state V5+ and calculations of the coulomb terms of lattice energy. | | | |
Reference
| Z. Naturforsch. 52b, 989—993 (1997); eingegangen am 26. Mai 1997 | | | |
Published
| 1997 | | | |
Keywords
| Barium, Cadmium, Vanadium Oxide, Crystal Structure | | | |
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| default:Reihe_B/52/ZNB-1997-52b-0989.pdf | | | | Identifier
| ZNB-1997-52b-0989 | | | | Volume
| 52 | |
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