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  • 1
    Electronic Resource
    Electronic Resource
    Beitrag zur Fluoreszens Seltener Erden (1962)
    Springer
    Naturwissenschaften 49 (1962), S. 180-180 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00640811
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  • 2
    Electronic Resource
    Electronic Resource
    Neue Oxometallate der Formel BaBeLa2O5, SrBeNd2O5 und SrBeSm2O5 (1988)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 561 (1988), S. 7-11 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: New Oxocompounds of the Formula BaBeLa2O5, SrBeNd2O5, and SrBeSm2O5.The hitherto unknown compounds (A) BaBeLa2O5, (B) SrBeNd2O5, and (C) SrBeSm2O5 were prepared by high temperature reactions. Single crystal work lead to monoclinic symmetry for (A) (space group P21/c a = 7.5109(11), b = 6.7875(35), c = 9.8945(35) Å, β = 90.56 (2)°, Z = 4). (B) und (C) crystallize with orthorhombic symmetry (space group Pnma, (B): a = 9.5780(32), b = 7.2527(45), c = 6.5829(20) Å, Z = 4, (C): a = 9.5039(9), b = 7.1885(8), c = 6.5223(8) Å, Z = 4). The statistical occupation of the Kagomé-network by M2+ and Ln3+ is discussed. It is shown that compounds of the formula SrBeLn2O5 form this structure type until Ln = Gd.
    Notes: Neu dargestellt wurden die Verbindungen (A) BaBeLa2O5, (B) SrBeNd2O5 und (C) SrBeSm2O5. (A) kristallisiert monoklin (Raumgruppe P21/c mit a = 7,5109(11), b = 6,7875(35), c = 9,8945(35) Å, β = 90,56°(2), Z = 4). (B) und (C) gehören zur Raumgruppe Pnma [(B): a = 9,5780(32), b = 7,2527(45), c = 6,5829(20) Å, Z = 4, (C): a = 9,5039(9), b = 7,1885(8), c = 6,5223(8) Å, Z = 4]. Die statistische Besetzung des Kagomé-Gerüsts mit M2+ und Ln3+ wird diskutiert und die Existenzgrenze der Reihe SrBeLn2O5 aufgezeigt.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19885610102
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  • 3
    Electronic Resource
    Electronic Resource
    Zur Verbindungsbildung MO: M2O3. Zur Kenntnis von BaCr2O4 (1988)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 564 (1988), S. 26-30 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: About a Compound Formation MO:M2O3. X. On BaCr2O4For the first time single crystals of BaCr2O4 were prepared as a high temperature compound of the SrCr2O4-type. It crystallizes with orthorhomibic symmetry, space group D2h13 - Pmmn, a = 12,286; b = 5,921; c = 5,146 Å Z = 4. The crystal structure are described and the relationship to the metastable compounds α-CaCr2O4 and SrCr2O4 are discussed.
    Notes: BaCr2O4 wurde erstmals einkristallin als Hochtemperaturverbindung vom SrCr2O4-Typ dargestellt. Es kristallisiert orthorhombisch, Raumgruppe D2h13 - Pmmn mit a = 12,286; b = 5,921; c = 5,146 Å Z = 4. Die Struktur wird beschrieben und das Verhalten gegenüber den entropiestabilisierten metastabilen Verbindungen α-CaCr2O4 diskutiert.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19885640104
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  • 4
    Electronic Resource
    Electronic Resource
    Zur Kristallchemie der Oxotantalate M4Ta2O9. III. Beiträge zur Kristallchemie von Zn4-xMgxTa2O9 und Zn2,1Mg0,9Ta2O8 (1988)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 564 (1988), S. 31-36 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal Chemistry of Oxotantalates M4Ta2O9. III. A Contribution on the Crystal Chemistry of Zn4-xMgxTa2O9 and Zn2.1Mg0.9Ta2O8X-ray powder and single crystal investigations of the Zn4-xMgxTa2O9 system show the instability of the Zn4Ta2O9-type against the substitution of Mg2+ ions. In all cases of substitution, oxides of the formula Zn4-xMgxTa2O9 crystallizes with a corund related structure. The metal positions (M2+) are occupied statistically by Zn2+. Compounds of the type Zn3-xMgxTa2O8 have the structure of Zn3Nb2O8. One of the point positions is occupied by Mg2+ and Zn2+. The existence of The existence of the different structure types and the polyhedra deformation are discussed in respect to the Mg2+ contents in Zn3-xMgxTa2O8.
    Notes: Untersuchungen mit Röntgenpulver- und Einkristalltechnik im System Zn4-xMgxTa2O9 zeigen, daß beim Einbau von Mg2+ der Zn4Ta2O9-Typ verlassen wird. Alle Misch kristalle kristallisieren im aufgefüllten Korundtyp. Zn2+ und Mg2+ besetzen im Metallteilgitter die vorhandenen Positionen statistisch. Verbindungen vom Typ Zn3-xMgxTa2O8 kristallisieren nicht im Zn3Ta2O8-Typ, sondern wie Zn3Nb2O8. Eine Metallpunktlage ist mit Mg2+ und Zn2+ besetzt. Die Existenz der verschiedenen Strukturtypen und die Polyederdeformation werden im Hinblick auf den Ersatz von Zn2+ gegen Mg2+ diskutiert.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19885640105
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  • 5
    Electronic Resource
    Electronic Resource
    Zur Kenntnis neuer Oxochromate: SrCr10O15 und BaCr10O15 mit zweiwertigem Chrom: MCr22+Cr83+O15 (1989)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 572 (1989), S. 89-94 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: About New Oxochromates: SrCr10O15 and BaCr10O15 Containing Divalent Chromium: MCr22+Cr83+O15High temperature reaction using reducing atmosphere lead to the new compounds (I) SrCr10O15 and (II) BaCr10O15. Single crystal X-ray investigations show orthorhombic symmetry: space group D2h18-Ccmb; I: a = 10.059; b = 11.406; c = 9.224 Å; II: a = 10.126; b = 11.491; c = 9.392 Å; Z = 4. Cr2+/Cr3+ are octahedral coordinated by O2-. Inside a CrO6-octahedral network are cavities comparable with those of some polyacids filled by Sr2+ or Ba2+ ions.
    Notes: Mit Hochtemperaturreaktionen in reduzierender Atmosphäre gelang die Darstellung der gemischtvalenten Oxochromate(I) SrCr10O15 und (II) BaCr10O15. Diese kristallisieren orthorhombisch, Raumgruppe D2h18-Ccmb mit (I): a = 10,059; b = 11,406; c = 9,224 Å und II: a = 10,126; b = 11,491; c = 9,392 Å; Z = 4. Cr2+/Cr3+ bilden mit O2- ein Oktaedergerüst, je 12 Oktaeder bauen wie bei Polysäuren für Sr2+ bzw. Ba2+ einen großvolumigen Hohlraum auf.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19895720110
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  • 6
    Electronic Resource
    Electronic Resource
    BaNi2In4Sc4O15 mit BaV10O15-Struktur, aber mit geordneter Metallverteilung (1989)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 572 (1989), S. 109-114 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: BaNi2In4Sc4O15 with BaV10O15-Structure, but Ordered Metal DistributionSingle crystal X-ray investigations of BaNi2In4Sc4O15 [space group D2h18-Cmca, a = 12.146; b = 10.880; c = 9.834 Å; Z = 4] show a statistical distribution of Ni2+ and Sc3+ of one of the possible point positions. The other oxygen octahedra are occupied by In3+ and Sc3+. This is the difference to compounds of the formula BaM10O15 (M = V, Cr, Ni/Cr) with total statistical metal distribution.
    Notes: Einkristalluntersuchungen an BaNi2In4Sc4O15 [Raumgruppe D2h18-Cmca. a = 12,146; b = 10,880; c = 9,834 Å; Z = 4] zeigen, daß Ni2+ nur mit Sc3+ eine der oktaedrisch koordinierten Metallpunktlagen statistisch besetzt. Alle anderen Polyeder sind frei von Ni2+, womit diese Verbindung sich von den Oxiden BaM10O15 (M = V, Cr, Ni/Cr) mit total statistischer Metallverteilung unterscheidet.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19895720113
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  • 7
    Electronic Resource
    Electronic Resource
    Ein Beitrag zur Kristallchemie der Oxotantalate. V. Geordnete und ungeordnete Metallverteilung in MnZn2Ta2O8 und Mn0,33Zn0,67Ta2O6 (1989)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 572 (1989), S. 102-108 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A Contribution on the Crystal Chemistry of Oxotantalates. V. Ordered and Disordered Metal Distributions in MnZn2Ta2O8 and Mn0.33Zn0.67Ta2O6The compounds (I) MnZn2Ta2O8 and (II) Mn0.33Zn0.67Ta2O6 were prepared by solid state reactions. Single crystal X-ray investigations show (I): a = 19.286; b = 5.922; c = 5.228 Å; β = 90.3°; Z = 4; space group C2h6-C2/c; (II): a = 4.730; b = 17.154; c = 5.093 Å; Z = 4; space group D2h14-Pbcn. I belongs to the Zn3Nb2O8-type with ordered Mn2+, Zn2+ distribution. II crystalizes like tri-α-PbO2 (for example ZnTa2O6) but in respect to the metal distribution it belongs to the disordered α-PbO2-type.
    Notes: Mit Hilfe von Festkörperreaktionen wurden (I) MnZn2Ta2O8 und (II) Mn0,33Zn0,67Ta2O6 einkristallin dargestellt. [(I): a = 19,286; b = 5,922; c = 5,228 Å; β = 90,3°; Z = 4; Raumgruppe C2h6-C2/c; (II): a = 4,730; b = 17,154; c = 5,093 Å; Z = 4; Raumgruppe D2h14-Pbcn] I gehört zum Zn3Nb2O8-Typ mit geordneter Mn2+,Zn2+-Verteilung. Die Verwandtschaft zum Columbit wird aufgezeigt. II kristallisiert wie tri-α-PbO2 (z. B. ZnTa2O6), allerdings mit einer ungeordneten Metallverteilung, womit sie kristallchemisch zur α-PbO2-Struktur gehört.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19895720112
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  • 8
    Electronic Resource
    Electronic Resource
    Über das Oxoindat Ba4In2O7 (1989)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 573 (1989), S. 12-18 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Oxoindate Ba4In2O7Ba4In2O7 was prepared for the first time by solid state reaction and investigated by X-ray methods. (Space group D4h17-14/mmm, a = 4.175; c = 29.483 Å; Z = 2). It shows a close crystal chemical relationship to Ba3In2O6 and La2SrCu2O6. One of the oxygen point positions is occupied only by a half. This fact alleviates the understanding of the layer structure of Ba4In2O7. The compound is compared with Sr4Tl2O7 and a further discussion in respect to Ba5In2O8 shows the probable identity of Ba5In2O8 with Ba4In2O7.
    Notes: Ba4In2O7 wurde erstmals dargestellt und an Einkristallen mit Röntgenbeugungsmethoden untersucht. (Raumgruppe D4h17-14/mmm, a = 4,175; c = 29,483 Å; Z = 2). Es liegt eine enge kristallchemische Verwandtschaft zu Ba3In2O6 und z. B. La2SrCu2O6 vor. Eine der Sauerstoffpunktlagen ist nur zur Hälfte besetzt; das macht den Schichtstrukturaufbau verständlich. Ba4In2O7 wird mit Sr4Tl2O7 verglichen. Eine Diskussion zeigt, daß Ba5In2O8 vermutlich mit Ba4In2O7 identisch ist.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19895730103
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  • 9
    Electronic Resource
    Electronic Resource
    Über ein Oxotantalat mit teilgeordneter Korundstruktur: Mn0,6Mg3,4Ta2O9 (1989)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 573 (1989), S. 19-23 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: About an Oxotantalate with Partly Ordered Corundum-Structure: Mn0.6Mg3.4Ta2O9In the system of mixed crystals of the composition Mn4-xMgxTa2O9 single crystals with x = 3.4 were examined by X-ray methods (space group D43d-P3c1; a = 5.2141; c = 14.178 Å; Z = 2). The point positions of the divalent metals are occupied in an ordered manner. Order and disorder are discussed in respect to Mn2Zn2Nb2O9, Mn3ZnNb2O9, and oxotantalates (MM′)4Ta2O9 [M, M′ = Zn, Ni, Mg].
    Notes: Im System Mn4-xMgxTa2O6 wurden Einkristalle für x = 3,4 mit Röntgenbeugung untersucht (Raumgruppe D43d-P3c1, a = 5,2141; c = 14,178 Å, Z = 2). Mn2+ und Mg2+ besetzen die entsprechenden Metallpunktlagen partiell geordnet. Der Grad der Ordnung wird im Vergleich zu Mn2Zn2Nb2O9, Mn3ZnNb2O9 und den Oxotantalaten (MM′)4Ta2O9 [M, M′ = Zn, Ni, Mg] diskutiert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19895730104
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  • 10
    Electronic Resource
    Electronic Resource
    Ni5HfB2O10 mit geordneter MetallverteilungProfessor Reginald Gruehn zum 60. Geburtstage am 6. Oktober 1989 gewidmet (1989)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 575 (1989), S. 26-30 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Ni5HfB2O10 with Ordered Metal DistributionNi5HfB2O10 was prepared for the first time and investigated by X-ray methods. It crystallizes with orthorhombic symmetry, space group D2h16 - Pnma, a = 9.328; b = 6.120; c = 12.334 Å; Z = 4. In opposition to the Ni5TiB2O10-type all metal point positions are strongly ordered. The authors are in doubt about the partly statistic metal distribution within Ni5M4+B2O10 (M4+ = Ti, Zr, Ge).
    Notes: Ni5HfB2O10 wurde erstmals dargestellt und an Einkristallen untersucht. Ni5HfB2O10 kristallisiert orthorhombisch, Raumgruppe D2h16 - Pnma, a = 9,328; b = 6,120; c = 12,334 Å, Z = 4. Im Gegensatz zum Ni5TiB2O10-Typ weist NiHfB2O10 eine total geordnete Metallverteilung auf. Die partiell statistische Verteilung von Ni2+ mit M4+ (M4+ = Ti, Zr, Ge) wird in Frage gestellt.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19895750105
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