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  • 550 - Earth sciences  (17)
  • Crystal Structure  (15)
  • 1990-1994  (29)
  • 1980-1984  (3)
  • 1970-1974
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  • 1
    Electronic Resource
    Electronic Resource
    Synthese und Kristallstruktur des Nonaselenids [Sr(15-Krone-5)2]Se9 (1993)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 619 (1993), S. 416-420 
    Details
    ISSN: 0044-2313
    Keywords: Nonaselenide ; Synthesis ; Crystal Structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Crystal Structure of the Nonaselenide [Sr(15-crown-5)2]Se9The title compound was prepared by the reaction of excess selenium with strontium diselenide in DMF in the presence of 15-crown-5. [Sr(15-crown-5)2]Se9 forms black crystals, which are soluble in DMF. They were characterized by FIR spectroscopy and by an X-ray structure determination.Space group P21/n, Z = 4, 2 381 observed unique reflections, R = 0.073. Lattice dimensions at 19°C: a = 1 228.7, b = 1 893.4, c = 1 575.7 pm, β = 99.15°. The compound consists of [Sr(15-crown-5)2]2+ ions in which the strontium ion is coordinated by the oxygen atoms of the crown ether molecules in a sandwich-like fashion, and of Se92- ions with a chain structure, which has a topolocical resemblance with the bicyclic ion Se102-.
    Notes: Die Titelverbindung entsteht durch Einwirkung von überschüssigem Selen auf Strontiumdiselenid in Dimethylformamid (DMF) in Gegenwart von 15-Krone-5. [Sr(15-Krone-5)2]Se9 bildet schwarze, in DMF leicht lösliche Kristalle, die durch das FIR-Spektrum und eine röntgenographische Strukturanalyse charakterisiert werden.Raumgruppe P21/n, Z = 4, 2 381 beobachtete unabhängige Reflexe, R = 0,073. Gitterabmessungen bei 19°C: a = 1 228,7; b = 1 893,4; c = 1 575,7 pm, β = 99,15°. Die Verbindung besteht aus [Sr(15-Krone-5)2]2+-Ionen, in denen das Strontiumion sandwichartig von den O-Atomen der beiden Kronenethermoleküle umgeben ist, und kettenförmigen Se92--Ionen, die topologische Verwandtschaft zu dem bicyclischen Se102--Ion aufweisen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19936190229
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  • 2
    Electronic Resource
    Electronic Resource
    Ein Beitrag zur Kristallchemie der Kobaltoxoniobate: CoNb2O6 mit Rutilstruktur (1980)
    Springer
    Monatshefte für Chemie 111 (1980), S. 1225-1227 
    Details
    ISSN: 1434-4475
    Keywords: Cobalt ; Crystal Structure ; Niobium ; Oxygen ; X-Ray
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract CoNb2O6 can be prepared by reaction of stoichiometric amounts of CoO (thermical decomposition of cobaltoxalate) and Nb2O5 in argon-atmosphere up to 1,400 °C. The isolated red-brown single crystals have tetragonal symmetry (a=472.6;c=305.4 pm; space group P42/mnm-D 4h 14 ). Electron probe micro-analysis of the single crystals verifies the composition Co0.33Nb0.67O2. Co2+ and Nb5+ occupy statistically the metal positions of the rutil-type structure. The differences between Co0.5Nb0.5O2 (CoNbO4≡AlNbO4-type) and Co0.38Nb0.67O2 (CoNb2O6) are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00909680
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  • 3
    Electronic Resource
    Electronic Resource
    Synthese und Strukturuntersuchung von Zn3Ta2O8 (1984)
    Springer
    Monatshefte für Chemie 115 (1984), S. 15-20 
    Details
    ISSN: 1434-4475
    Keywords: Zinc ; Tantal ; Oxygen ; X-Ray ; Crystal Structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Zn3Ta2O8 was prepared by high temperature solid state reaction (CO2-Lasertechnique). X-ray investigations of single crystals yield monoclinic symmetry (a=9.499;b=8.411;c=8.881 Å; β=116.03°, space group C 2h 6 —C2/c). There is no relationship between Zn3Ta2O8 and Zn3Nb2O8. Zn3Ta2O8 shows a characteristic structure type with octahedral coordination of Ta5+ and tetrahedral coordination of Zn2+.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00798417
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  • 4
    Electronic Resource
    Electronic Resource
    Neue Lanthanoidmagnetoplumbite: LaFe11A1019, SmFe4Al8O19 und Eu0,83Fe2Al10O19 (1982)
    Springer
    Monatshefte für Chemie 113 (1982), S. 1079-1085 
    Details
    ISSN: 1434-4475
    Keywords: Aluminium ; Crystal Structure ; Iron ; Oxygen ; Rare Earth
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract New compounds of magnetoplumbite structure with rare earth-ions were prepared by solid state reactions and determined by X-ray single crystal work. They crystallize in space group D 6h 4 -P63/mmc withA:a=582.6,c=2283;B:a=563.4,c=2208;C:a=565.8,c=2218 pm. The distribution of Fe and Al to the metal positions were determined and the thermal ellipsoids of the metal positions are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00808621
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  • 5
    Electronic Resource
    Electronic Resource
    Synthesen und Kristallstrukturen der Polytellurido-Komplexe [K(15-Krone-5)2]2[MTe7] mit M = Zn und Hg (1993)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 619 (1993), S. 500-506 
    Details
    ISSN: 0044-2313
    Keywords: Polytellurido Complexes of Zinc and Mercury ; Synthesis ; Crystal Structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Crystal Structures of the Polyellurido Complexes [K(15-Crown-5)2]2[MTe7] with M = Zn and HgThe title compounds were obtained in the presence of 15-crown 5 from solutions of zinc and mercury acetate, respectively, in DMF by addition of a solution of K2Te3 in DMF at 0°C (M = Zn) and -50°C (M = Hg). They form black crystal needles with metallic luster. Their crystal structures were determined by X-ray diffraction. The structures of [K(15-crown-5)2]2ZnTe7 and [K(15-crown-5)2]2HgTe7 show two-dimensional disorder as evidence by diffuse scattering. The averaged structures that were determined with the Bragg reflexions correspond to space group Pbcn and have very similar lattice parameters. Nevertheless, the structures differ. [HgTe7]2- ions consist of two condensed five membered rings. They are arranged to form strands in the c direction; within of one strand the ions have a definite orientation, but in different strands two different orientations occur randomly. A [ZnTe7]2- ion can be thought of consisting of a Zn2+ ion, a Te42- ion bonded in a chelate manner and a Te32- ion bonded with one terminal Te atom to the Zn2+. The [ZnTe7]2- ions are associated to strands in the c direction with two different strand orientations occuring randomly.
    Notes: Die Titelverbindungen entstehen aus Lösungen der Acetate von Zink bzw. Quecksilber in DMF bei Anwesenheit von 15-Krone-5 nach Zugabe einer Lösung von K2Te3 in DMF bei 0°C (M = Zn) bzw. -50°C (M = Hg). Die Verbindungen bilden schwarze, metallisch glänzende Kristallnadeln, die wir durch röntgenographische Strukturanalysen charakterisiert haben. Die Kristallstrukturen von [K(15-Krone-5)2]2[ZnTe7] und [K(15-Krone-5)2]2[HgTe7] sind zweidimensional fehlgeordnet, wie die entsprechende diffuse Streuung zeigt. Die Überlagerungsstrukturen, die mit Hilfe der Braggschen Reflexe bestimmt wurden, entsprechen bei beiden Verbindungen der Raumgruppe Pbcn bei sehr Ähnlichen Gitterparametern. Trotzdem unterscheiden sich die Strukturen. Die [HgTe7]2--Ionen bestehen aus zwei kondensierten Fünferringen. Sie sind zu Strängen längs c angeordnet, wobei sie innerhalb eines Stranges eine definierte Orientierung haben, aber von Strang zu Strang eine von zwei entgegengesetzten Orientierungen statistisch vorkommt. Ein [ZnTe7]2--Ion kann man sich aufgebaut denken aus einem Zn2+-Ion, einem chelatartig gebundenen Te42--Ion und einem Te32--Ion, das über ein terminales Te-Atom an das Zn2+ gebunden ist. Die [ZnTe7]2--Ionen sind zu Strängen längs c assoziiert, wobei statistisch zwei Strangorientierungen vorkommen.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19936190311
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  • 6
    Electronic Resource
    Electronic Resource
    AlTaO4 mit AlNbO4-Struktur (1991)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 596 (1991), S. 107-110 
    Details
    ISSN: 0044-2313
    Keywords: Aluminium ; Tantalum ; Oxygen ; Crystal Structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: AlTaO4 with AlNbO4 StructureSingle crystals of AlTaO4 were prepared by solid state reaction. It crystallizes with monoclinic symmetry, space group C32h-C2/m; a = 12.135, b = 3.776, c = 6.449 Å,β = 107.74°, Z = 4. AlTaO4 exists in a second crystal form with AlNbO4 structure.
    Notes: Mit Feststoffreaktionen wurden Einkristalle von AlTaO4 dargestellt. Es kristallisiert monoklin, Raumgruppe C32h-C2/m; a = 12,135; b = 3,776; c = 6,449 Å; β = 107,74°; Z = 4. AlTaO4 existiert in einer zweiten Kristallform mit AlNbaO4-Struktur.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19915960115
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  • 7
    Electronic Resource
    Electronic Resource
    Zur Kenntnis von Sr2Bi3V3O14 (1992)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 618 (1992), S. 39-42 
    Details
    ISSN: 0044-2313
    Keywords: Strontium ; Bismuth ; Vanadium ; Oxide ; Crystal Structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On Sr2Bi3V3O14Single crystals of the hitherto unknown compound Sr3Bi3V3O14 were prepared and investigated by X-ray work. It crystallizes with triclinic symmetry, space group P1, a = 7.0838, b = 7.1732, c = 14.1067 Å; α = 97.46, β = 98.70, γ = 110.99°, Z = 2. The crystal structure is characterized by VO4 tetrahedra and one side open Bi3+ coordination inside Bi2O11 groups.
    Notes: Die bisher unbekannte Verbindung Sr2Bi3V3O14 wurde einkristallin dargestellt und röntgenographisch untersucht. Sie kristallisiert triklin, in der Raumgruppe P1 mit a = 7,0838, b = 7,1732, c = 14,1067 Å; α = 97,46, β = 98,70, γ = 110,99°, Z = 2. Die Kristallstruktur ist durch VO4-Tetraeder und Bi2O11-Einheiten mit einseitig offener Bi3+-Koordination ausgezeichnet.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19926180108
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  • 8
    Electronic Resource
    Electronic Resource
    Die Kristallstrukturen der Polyselenide [Cs(18-Krone-6)]2Se5 · DMF, [Rb(222-Crypt)]2Se6, [Ba(15-Krone-5)2]Se6 · DMF und [Na(12-Krone-4)2]2Se7Professor Dietrich Mootz zum 60. Geburtstage gewidmet (1993)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 619 (1993), S. 1247-1256 
    Details
    ISSN: 0044-2313
    Keywords: Polyselenides ; Synthesis ; Crystal Structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal Structures of the Polyselenides [Cs(18-Crown-6)]2Se5 · DMF, [Rb(222-Crypt)]2Se6, [Ba(15-Crown-5)2]Se6 · DMF, and [Na(12-Crown-4)2]Se7.The title compounds have been prepared by reactions of the corresponding diselenides with excess selenium in the presence of crown ethers in dimethylformamide solutions, forming black crystals.[Cs(18-Crown-6)]2Se5 · DMF: Space group P21/m, Z = 2, 2 194 observed unique reflections, R = 0.119. Lattice dimensions at 20°C: a = 1 041.2; b = 1 496.3; c = 1 459.7 pm; β = 100.39°. The compound forms an ionic triple with Cs…Se-contacts between 374 and 381 pm.[Rb(222-Crypt)]2Se6: Space group P1, Z = 2, 7 405 observed unique reflections, R = 0.056. Lattice dimensions at - 70°C: a = 1 106.8; b = 1 460.8; c = 1 718.8 pm; α = 89.22°; β = 86.65°; γ = 71.53°. The compound contains Se62- chains without direct contact with each other.[Ba(15-Crown-5)2]Se6 · DMF: Space group P21/n, Z = 4, 2 680 observed unique reflections, R = 0.055. Lattice dimensions at - 80°C: a = 1 051.9; b = 1 322.4; c = 2 729.9 pm; β = 100.93°. The compound contains Se62- chains, which are isolated from each other by the cations and the included DMF molecules.[Na(12-Crown-4)2]2Se7: Space group P1, Z = 2, 7 313 observed unique reflections, R = 0.042. Lattice dimensions at - 70°C: a = 1 260.9; b = 1 433.6; c = 1 462.9 pm; α = 80.27°; β = 78.60°; γ = 69.34°. The compound contains Se72- chains without direct contacts with each other.
    Notes: Die Titelverbindungen entstehen aus den entsprechenden Diseleniden mit überschüssigem Selen in Gegenwart von Kronenethern in Dimethylformamid-Lösungen in Form schwarzer Kristalle.[Cs(18-Krone-6)]2Se5 · DMF: Raumgruppe P21/m, Z = 2, 2 194 beobachtete unabhängige Reflexe, R = 0,119. Gitterabmessungen bei 20°C: a = 1 041,2; b = 1 496,3; c = 1 459,7 pm; β = 100,39°. Die Verbindung bildet ein Ionentripel mit Cs…Se-Kontakten zu dem kettenförmigen Se52--Ion von 374 bis 381 pm.[Rb(222-Crypt)]2Se6: Raumgruppe P1, Z = 2, 7 405 beobachtete unabhängige Reflexe, R = 0,056. Gitterabmessungen bei - 70°C: a = 1 106,8; b = 1 460,8; c = 1 718,8 pm; α = 89,22°; β = 86,65°; γ = 71,53°. Die Verbindung enthält kettenförmige Se62--Ionen, die keine Kontakte untereinander ausbilden.[Ba(15-Krone-5)2]Se6 … DMF: Raumgruppe P21/n, Z = 4, 2 680 beobachtete unabhängige Reflexe, R = 0,055. Gitterabmessungen bei - 80°C: a = 1 051,9; b = 1 322,4; c = 2 729,9 pm; β = 100,93°. Die Verbindung enthält kettenförmige Se62--Ionen, die im Gitter durch die Kationen und die eingelagerten DMF-Moleküle voneinander isoliert sind.[Na(12-Krone-4)2]2Se7: Raumgruppe P1, Z = 2, 7 313 beobachtete unabhängige Reflexe, R = 0,042. Gitterabmessungen bei - 70°C: a = 1 260,9; b = 1 433,6; c = 1 462,9 pm; α = 80,27°; β = 78,60°; γ = 69,34°. Die Verbindung enthält kettenförmige Se72--Ionen, die keine direkten Kontakte untereinander ausbilden.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19936190717
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  • 9
    Electronic Resource
    Electronic Resource
    Zur Kenntnis von BaTiVO4 und SrTiVO4 (1992)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 611 (1992), S. 137-140 
    Details
    ISSN: 0044-2313
    Keywords: Barium ; Strontium ; Thallium ; Oxides ; Crystal Structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On BaTiVO4 and SrTiVO4BaTiVO4 and SrTiVO4 were prepared in closed systems by solid state reactions. They crystallize with orthorhombic symmetry (BaTiVO4: space group D2h16-Pmnb; a = 5.889; b = 7.889; c =10.397 Å; Z = 4; SrTiVO4: space group D24-P21,21,21,21; a = 5.855; b = 7.572; c = 10.012 Å; Z = 4) and belong to β-K2SO4-type. The ordered occupation of point positions by Ba2+ and Tl+ as well as the decrease in symmetry of SrTiVO4 are discussed.
    Notes: BaTiVO4 und SrTiVO4 wurden durch Festkörperreaktionen im geschlossenen System dargestellt. Beide Verbindungen Kristallisieren orthorhombisch (BaTiVO4: Raumgruppe D2h16-Pmnb; a = 5,889; b = 7, 889; c = 10,397; Å; SrTiVO4: Raumgruppe D24-P21,21,21,; a= 5,855; b = 7,572; c = 10,012 Å; Z = 4) und stellen Varianten des β-K2SO4-typs dar. Die geordnete Besetzung der Punktlagen mit Ba2+ und Tl+ sowie die Symmetrieerniedrigung in SrTiVO4 werden diskutiert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19926110523
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  • 10
    Electronic Resource
    Electronic Resource
    Die erste Verbindung mit Mn2+ der Stoffklasse BaMLn2O5: BaMnDy2O5 (1992)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 612 (1992), S. 14-16 
    Details
    ISSN: 0044-2313
    Keywords: Barium ; Manganese ; Rare Earth ; Oxygen ; Crystal Structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The First Compound of BaMLn2O5-Type Containing Mn2+: BaMnDy2O5Single crystals of the hitherto unknown compound BaMnDy2O5 were prepared by CO2-Laser technique and H2 atmosphere. Four circle diffractometer measurements led to space group D162h-Pnma, a = 12.428; b = 5.766; c = 7.143 Å; Z = 4. It is isotypic to BaCuSm2O5 and shows Mn2+ in square pyramids of oxygen.
    Notes: BaMnDy2O5 wurde erstmals mit CO2-Lasertechnik in H2-Atmosphäre dargestellt und an Einkristallen röntgenographisch untersucht. Es kristallisiert im BaCuSm2O5-Typ, Raumgruppe D162h-Pnma, a = 12,428; b = 5,766; c = 7,143 Å; Z = 4. Mn2+ ist von O2- tetragonal pyramidal koordiniert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19926120103
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