| | 2 | Author
| Walter Abriel, Hartmut Ehrhardt | Requires cookie* | | | Title
| Über hexakoordinierte gemischte Halogeno-Anionen des Te(IV): Kristallographische und Raman-spektroskopische Untersuchungen an Rb 2 TeBr 3 , 5 Cl 2 , 5 On Hexacoordinated Mixed Halogeno Anions of Te(IV): Crystallographic and Raman Spectroscopic Investigation of Rb 2 TeBr 3 5 C1 2 5  | | | | Abstract
| The title compound contains the anions [TeBr 3 Cl 3 ] 2_ and [TeBr 4 Cl 2 ] 2_ in a 1:1 ratio. The corresponding point symmetries, detected by Raman spectroscopic methods, are 3 m and 4/mmm, respectively. The crystal structure analysis exhibits a random distribution of these anions: K 2 PtCl 6 -type, space group Fm3m with a = 10.4602(5) Ä and Z = 4, final R = 0.036 from 178 F n (MoKa). Einführung | | | |
Reference
| Z. Naturforsch. 43b, 557—560 (1988); eingegangen am 7. Januar 1988 | | | |
Published
| 1988 | | | |
Keywords
| Tellurates, Crystal Structure, Raman Spectra | | | |
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| default:Reihe_B/43/ZNB-1988-43b-0557.pdf | | | | Identifier
| ZNB-1988-43b-0557 | | | | Volume
| 43 | |
| 3 | Author
| B. Wulff, Hk Wedel, Müller-Buschbaum | Requires cookie* | | | Title
| Zur Kristallchemie von Telluraten mit Mn2+ im kationischen und anionischen Teil der Kristallstruktur: (Mn2?4Cuo,6)Te06, Ba2M nTe06 und Pb(Mn0,5 Te0,5 )O3 On the Crystal Chemistry of Tellurates Containing Mn2+ in the Cationic and Anionic Part of the Crystal Structure: (Mn2 4Cu0 6)Te06, Ba2MnTe06 and Pb(Mn0 5Te0 5) 0 3 L | | | | Abstract
| Single crystals of (Mn2.4Cu0 6)Te06 (I), Ba2MnTe06 (II) and Pb(Mn0 5Te0 5) 0 3 (III) have been prepared by crystallization from fluxes. X-ray investigations led to rhombohedric sym metry (I): R3, (II): R3m with the trigonal lattice constants (I): a = 8.826(1), c = 10.687(2) Ä, Z = 2. (II): a = 5.817(8), c = 14.244(3) A, Z = 3. Compound (III) crystallizes with cubic symmetry P43m, a = 4.045(3) A, Z = 1. (I) is the first example of a manganese(II) tellurate and belongs to the structure type of A3X 0 6 compounds like (Mn2In)Sb06, Mn3W 0 6 and Ca3U 0 6. (II) exemplifies an ordered and (III) a disordered variation of the perovskites. | | | |
Reference
| (Z. Naturforsch. 53b, 49—52 [1998]; eingegangen am 15. Oktober 1997) | | | |
Published
| 1998 | | | |
Keywords
| Manganese, Copper, Lead, Barium, Tellurates | | | |
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| default:Reihe_B/53/ZNB-1998-53b-0049.pdf | | | | Identifier
| ZNB-1998-53b-0049 | | | | Volume
| 53 | |
| 4 | Author
| Hk Wulff, Müller-Buschbaum | Requires cookie* | | | Title
| Synthese und Kristallstruktur des Lanthan-Titanat-Tellurats LaTi | | | | Abstract
| (Ti0 2 5Te0j 5)O6 und seine Verwandtschaft mit PbSb20 6 und Sr(MnTe)06 Synthesis and Crystal Structure of the Lanthanum Titanate Tellurate LaTi(Ti0 25Te0 75) 0 6 and its Relationship to PbSb20 6 and Sr(M nTe)06 L. Single crystals of LaTi(Ti0 25T e o .75) 0 6 have been prepared by solid state reactions. X-ray investigations led to trigonal symmetry, space group C3-P3 , a = 5.141(10), c = 5.218(10) A, Z = 1. The compound is characterized by a predominantly ordered distribution of Ti4+ and Te6+. Typical features of the crystal structure are staggered layers containing edge connected T i0 6 and (Ti,Te)06 octahedra. The layers are connected by La3+ ions receiving an octahedral coordination by the surrounding oxygen ions. The relationships to the PbSb20 6 type and the recently described compound Sr(M nTe)06 are discussed. | | | |
Reference
| Z. Naturforsch. 53b, 149—152 (1998); eingegangen am 25. November 1997 | | | |
Published
| 1998 | | | |
Keywords
| Lanthanum, Titanate, Tellurate, Crystal Structure | | | |
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| default:Reihe_B/53/ZNB-1998-53b-0149.pdf | | | | Identifier
| ZNB-1998-53b-0149 | | | | Volume
| 53 | |
| 5 | Author
| Hk Wulff, Müller-Buschbaum | Requires cookie* | | | Title
| Isolierte trigonale S r 0 6-Prismen verknüpfen Kagome-Netze im Strontium-Manganat(I V)-Tellurat( VI): SrMnTe06 Kagome Layers Connected by Isolated Trigonal Sr06 Prisms in the Strontium Manganate(IV) Tellurate(VI): SrMnTe06 L | | | | Abstract
| Single crystals of the hitherto unknown compound SrM nT e06 have been prepared from Sr(0H)2-8H20 , M n C 0 3(aq) and T e 0 2 in air by crystallization below the melt range. X-ray in vestigations showed hexagonal symmetry, space group D3h-P62m, lattice constants a = 5.143(1), c = 5.384(2) A, Z = 1. SrM nTe06 is characterized by staggered [(Mn/Te)60 18] Kagome layers along [001]. These layers are connected by Sr2+ ions, resulting in S r0 6 prisms isolated from each other. The structure is discussed with respect to the connection of Kagome nets in the quaternary oxides of the Ba3Ln40 9 type. | | | |
Reference
| Z. Naturforsch. 53b, 283—286 (1998); eingegangen am 7. November 1997 | | | |
Published
| 1998 | | | |
Keywords
| Strontium, Manganese, Tellurate, Crystal Structure | | | |
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| default:Reihe_B/53/ZNB-1998-53b-0283.pdf | | | | Identifier
| ZNB-1998-53b-0283 | | | | Volume
| 53 | |
| 6 | Author
| B. Wedel, L. Wulff, Hk Müller-Buschbaum | Requires cookie* | | | Title
| Isolierte ^[TeOs]-Oktaederketten im Bleitellurat Pb2T e05 Isolated ^ [Te05] Chains of Octahedra in the Lead Tellurate Pb2T e05 | | | | Abstract
| Single crystals of Pb2T e0 5 have been prepared by flux techniques. X-ray investigations showed a new crystal structure with monoclinic symmetry, space group Cj-Cc, a = 13.099(3), b = 5.714(1), c = 7.520(2) Ä, ß = 123,80(3)°, Z = 4. Pb2T e 0 5 is characterized by o[o[Te05] chains of octahedra isolated from each other and incorporated into an edge, corner and face connected frame of P b 0 7 polyhedra. Possible positions o f the lone pair o f electrons of Pb2+ are estimated by calculations of Coulomb terms of lattice energy. | | | |
Reference
| Z. Naturforsch. 53b, 287—290 (1998); eingegangen am 17. November 1997 | | | |
Published
| 1998 | | | |
Keywords
| Lead, Tellurate, Crystal Structure | | | |
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| default:Reihe_B/53/ZNB-1998-53b-0287.pdf | | | | Identifier
| ZNB-1998-53b-0287 | | | | Volume
| 53 | |
| 7 | Author
| Claudia Friedrich | Requires cookie* | | | Title
| Zur Stereochemie des freien Elektronenpaares in Verbindungen des vierwertigen Tellurs: Verzerrtes TeCI62"-Oktaeder in |H | | | | Abstract
| ,N (C H 2),NH3lTeCI," regulär oktaedrisches Anion in | HjINfCHjliNHilSnCI,, On the Stereochemistry of Lone Pair Electrons in Com pounds with Tetravalent Tellurium: D istorted TeCl62~-Octahedron in [H3N (C H 2)3N H 3]T eCl6, Regular Octahedral A nion in [H3N (C H 2)3N H 3]SnC l6 W alter Abriel* Using 293 K diffractom eter intensity data, the structures o f [H 3N (C H 2)3N H 3]TeCl6 and [H3N (C H 2)3N H 3]SnCl6 have been determ ined by single crystal X-ray technique and refined to a | | | |
Reference
| Z. Naturforsch. 40b, 1691 (1985); eingegangen am 30. August 1985 | | | |
Published
| 1985 | | | |
Keywords
| Lone Pair Electrons, Tellurates, Stannates, Crystal Structure | | | |
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| default:Reihe_B/40/ZNB-1985-40b-1691.pdf | | | | Identifier
| ZNB-1985-40b-1691 | | | | Volume
| 40 | |
| 8 | Author
| Hk Wulff, Müller-Buschbaum | Requires cookie* | | | Title
| Zur Kristallchemie der Kupfer(II)-ZinkteIlurate Cu5 Zn4Te3 0 18 | | | | Abstract
| Cuj^Znj^TeOg, mit einer Notiz über Cul95Co1?5T e06 On the Crystal Chemistry of the Copper(II) Zinc Tellurates Cu5Zn4Te30 ,8 and Cu, 5Zn, 5Te06 with a Note on Cu, 5Co, 5Te06 L. Single crystals of Cu5Zn4Te30 , 8 (I), Cu, 5Zn, 5Te06 (II) and Cu, 5Co, 5Te06 (III) have been prepared and investigated by X-ray work. The structure of (I) was solved in the monoclinic space group C^-C2, a = 14.834(2), b = 8.801(1), c = 10.375(2) Ä, ß = 93.27(2)°, Z = 4. (II) and (III) crystallize with cubic symmetry, space group Th-Ia3, a{U) = 9.557(1), a(III) = 9.570(1) Ä, Z = 8. (I) shows a complicated structure formed by Te06 octahedra isolated from each other, Zn20 6 double tetrahedra and Zn20 8 double square pyramids. These polyhedra are incorporated into a network of edge and corner connected stretched C u06 octahedra. (II) and (III) are isotypic to Cu3T e06 and have a (Cu/M)30 6 octahedra network, statistically occupied by Cu2+ and Zn2+ or Cu_+ and Co2+. | | | |
Reference
| (Z. Naturforsch. 53b, 53—57 [1998]; eingegangen am 27. Oktober 1997) | | | |
Published
| 1998 | | | |
Keywords
| Copper, Zinc, Cobalt, Tellurate, Crystal Structure | | | |
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| default:Reihe_B/53/ZNB-1998-53b-0053.pdf | | | | Identifier
| ZNB-1998-53b-0053 | | | | Volume
| 53 | |
| 9 | Author
| | Requires cookie* | | | Title
| Die | | | | Abstract
| Kristallstruktur von [(CH3)4N]2TeCl6 und über die Einschlußverbindung [(CH3)4N]2(CH3CN)TeCl6 The Crystal Structure of [(CH 3)4N]2TeCl6 and the Inclusion Com pound [(CH3)4N]2(CH 3C N)TeCl6 W alter Abriel* Both title com pounds show an antifluorite-like arrangement o f (C H 3)4N + cations and TeC l62~ anions. The remaining octahedral holes in this array can be filled with C H 3CN m olecules forming the inclusion com pound by crystallization from C H 3CN solution. [(C H 3)4N ]2TeC l6 (space group F d 3c with a = 25.791(3) Ä at 265(5) K and Z = 32) contains almost regular TeCl62-octahedra. In contrast, in [(CH 3)4N ]2(C H 3C N)T eC l6 (space group Cmcm with a = 12.765(6), b = 14.349(7), c = 12.716(3) Ä and Z = 4) the anion is statically distorted with the approximate point symmetry 4 mm. A t tem peratures above 320 K the solvent m olecules can be rem oved yielding the F d 3c phase. Finally, structural relationships betw een antifluorite-like phases A 2B X 6 and elpasolites A 2B 'B X 6 considering halogenides and cyanides are discussed. | | | |
Reference
| Z. Naturforsch. 41b, 592 (1986); eingegangen am 3. Februar 1986 | | | |
Published
| 1986 | | | |
Keywords
| Crystal Structure, Tellurates, Inclusion C om pound, Lone Pair Electrons | | | |
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| default:Reihe_B/41/ZNB-1986-41b-0592.pdf | | | | Identifier
| ZNB-1986-41b-0592 | | | | Volume
| 41 | |
| 10 | Author
| W. Alter, Abriel, Ernst-Jürgen, Z. Ehnder | Requires cookie* | | | Title
| Vibronische Kopplung und dynamisch verzerrte Strukturen in Hexahalogenotelluraten(IV): Ergebnisse aus Tieftemperatur-Röntgenbeugungsuntersuchungen (300—160 K) und aus FTIR-spektroskopischen Experimenten (300—5 K) [1] Vibronic Coupling and Dynamically D istorted Structures in Hexahalogenotellurates(IV): Low Tem peratur X-Ray Diffraction (300—160 K) and FTIR-Spectroscopic (300—5 K) Results [1] | | | | Abstract
| From theoretical considerations a dynamically distorted octahedron as a result of vibronic coupling between the ground state and the first excited state should exist for 14 electron AX6E systems like TeX62-. A high symmetry crystal field yielding at least a center of symmetry for the Te position stabilizes this fluctuating structure, otherwise statical distortion will be observed. From X-ray diffraction experiments on antifluorite type compounds A 2TeX6 (A = Rb, Cs; X = Cl, Br) the averaged structure (m 3m symmetry) of the anions was found even at very low temperatures. The thermal parameters are not significantly different from those of similar S n X ^ -compounds. Distortions therefore are very small and are evident from FTIR spectroscopic meas urements only. Here very broad T lu-deformation vibration bands are observed down to tempera tures <10 K without splitting: A statically distorted species could not be frozen out. In contrast to XeF6 for TeX62~ the energy gap between the threefold, fourfold or sixfold minima of the potential surface (according to the symmetry of one component of the T ,u-vibration) is very small and shifted to temperatures lower than reached with the devices used for these experiments. | | | |
Reference
| Z. Naturforsch. 42b, 1273—1281 (1987); eingegangen am 24. Juni 1987 | | | |
Published
| 1987 | | | |
Keywords
| Lone Pair Electrons, Vibronic Coupling, Pseudo Jahn-Teller-Effect, Tellurates | | | |
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| default:Reihe_B/42/ZNB-1987-42b-1273.pdf | | | | Identifier
| ZNB-1987-42b-1273 | | | | Volume
| 42 | |
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