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  • 1
    Electronic Resource
    Electronic Resource
    Structure of potassium sodium digermanate Na7(Na1.4K0.6)K3[Ge2O7]2 (1991)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 47 (1991), S. 1353-1356 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270190011490
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  • 2
    Electronic Resource
    Electronic Resource
    4-(4-Biphenyl)-2,3,5,6-tetrafluoropyridine, a new material for application in light-emitting diodes (1999)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 55 (1999), S. 693-695 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270198015169
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  • 3
    Electronic Resource
    Electronic Resource
    The structure of pentarubidium triaqua-μ3-oxo-hexa-μ-sulfato-triferrate(III) dihydrate (1980)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 36 (1980), S. 1278-1283 
    Details
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567740880005912
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  • 4
    Electronic Resource
    Electronic Resource
    Die Kristallstruktur von β-Pentakalium-[μ3-oxo-hexa-μ-sulfato-triaquatrieisen(III)]-heptahydrat – eine monokline Modifikation des Mausschen Salzes (1978)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 34 (1978), S. 378-384 
    Details
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567740878003180
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  • 5
    Electronic Resource
    Electronic Resource
    Die Kristallstruktur der Verbindung LiNa[Ge4O9] (1969)
    Springer
    Monatshefte für Chemie 100 (1969), S. 79-90 
    Details
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract The crystal structure of LiNa[Ge4O9] has been determined by means of three-dimensional Patterson and electron density syntheses and refined by least-squares methods. The orthorhombic unit cell (Pcca-D 2h 8 ) having the lattice parametersa=9.31,b=4.68 andc=15.88 Å contains 4 formula units. The crystal structure consists of [GeO3] n -chains of tetrahedrally coordinated Ge-atoms which are connected by [GeO6]-octahedra to form a three-dimensional framework. The interatomic Ge-O-distances are found to be 1.758[4] and 1.866[6] Å. The compound LiNa[Ge4O9] represents a member of the solid solution series Li2−x Na x [Ge4O9].
    Notes: Zusammenfassung Die Kristallstruktur der Verbindung LiNa[Ge4O9] wird durch dreidimensionale Patterson- und Fourier-Synthesen bestimmt und mit Hilfe der Methode der kleinsten Quadrate verfeinert. Die rhombische Elementarzelle (Pcca-D 2h 8 ) mit den Abmessungen:a=9,31,b=4,68,c=15,88 Å enthält 4 Formeleinheiten. Die Struktur wird aus [GeO3] n -Ketten mit tetraedrisch koordiniertem Germanium aufgebaut, die über [GeO6]-Oktaeder zu einem dreidimensionalen Gerüst vernetzt sind. Als mittlere interatomare Ge-O-Abstände wurden erhalten: 1,758 [4] und 1,866[6] Å. Die Verbindung LiNa[Ge4O9] stellt ein Endglied der Mischreihe Li2−x Na x [Ge4O9] dar.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00938240
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  • 6
    Electronic Resource
    Electronic Resource
    Die Kristallstruktur der Verbindung Li6[Si2O7] (1969)
    Springer
    Monatshefte für Chemie 100 (1969), S. 295-303 
    Details
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract The crystal structure of Li6[Si2O7] has been determined by means of Patterson projections, 3-dimensional Fourier syntheses and the least-squares method. The lattice parameters of the tetragonal unit cell (P421m-D 2d 3 ) area=7.715 andc=4.88 Å. The compound belongs to the sorosilicates having isolated [Si2O7]-groups. The coordination numbers of the lithium ions are 4 and 5. The average interatomic distances were found to be: Si-O : 1,64 Å; Li-O : 1.95 [4] and 2.18 [5] Å.
    Notes: Zusammenfassung Die Kristallstruktur von Li6[Si2O7] wird mit Hilfe von Patterson-Projektionen und dreidimensionalen Fourier-Synthesen sowie nach der Methode der kleinsten Quadrate bestimmt. Die Gitterparameter der tetragonalen Elementarzelle (P421m-D 2d 3 ) betragen:a=7,715;c=4,88 Å. Die Verbindung zählt zu den Sorosilicaten mit isolierten [Si2O7]-Gruppen. Die Lithiumionen weisen gegenüber Sauerstoff die Koordinationszahlen 4 und 5 auf. Als mittlere Abstände [Å] wurden ermittelt: Si-O : 1,64 Li-O : 1,95 [4] und 2,18 [5].
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00938267
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  • 7
    Electronic Resource
    Electronic Resource
    Die Kristallstruktur von Rb6Si10O23 (1973)
    Springer
    Monatshefte für Chemie 104 (1973), S. 854-863 
    Details
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Kristallstruktur der Verbindung Rb6Si10O23 (bisher als Rb2Si4O9 beschrieben) wurde mit Hilfe dreidimensionaler Röntgendaten bestimmt und bis zu einemR-Wert von 0,078 verfeinert. Die Gitterparameter der rhombischen Elementarzelle (C2mm-C 2v 14 ) betragen:a=9,348,b=16,290 undc=8,055 Å. Die Struktur besitzt ein dreidimensionales Gerüst aus [SiO4]-Tetraedern, die sowohl über 4 als auch über 3 Ecken vernetzt vorliegen. Die Anordnung der Tetraeder kann aus der Tridymitstruktur abgeleitet werden und zeigt noch deutlich pseudohexagonale Symmetrie. Bei 500 °C geht die Verbindung in eine Hochtemperaturform mit hexagonaler Symmetrie über (a=9,48 undc=8,16 Å bei 500 °C).
    Notes: Abstract The crystal structure of the compound Rb6Si10O23 (identical with “Rb2Si4O9”) has been determined by means of three-dimensional X-ray data resulting anR-value of 0.078. The lattice parameters of the orthorhombic unit cell (C2mm-C 2v 14 ) are:a=9.348,b=16.290 andc=8.055 Å. The structure consists of a three-dimensional framework built up by [SiO4] tetrahedra sharing 4 as well as 3 corners. The arrangement of tetrahedra can be derived from tridymite structure and exhibits pseudohexagonal symmetry. The compound transforms to a high-temperature modification with hexagonal symmetry at 500 °C (a=9.48 andc=8.16 Å).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00910597
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  • 8
    Electronic Resource
    Electronic Resource
    Erstmalige Herstellung von N,C10-überbrückten Morphin-Derivaten 5H-10,13-Iminoethanophenanthro[4,5-bcd]furan, 1. Mitt. (1993)
    Springer
    Monatshefte für Chemie 124 (1993), S. 909-922 
    Details
    ISSN: 1434-4475
    Keywords: 7-Iodo-neopinondimethylacetal ; 5H-10,13-Iminoethanophenanthro[4,5-bcd]furan ; Hofmann-degradation of ammonium-bases ; Azepinocodeines
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary In addition to recently reported results [1, 2] we present a new codeine-analogue7 with a different structural pattern in the nitrogen-region of the alkaloid. Synthesis by two different routes and some elucidating reactions are described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00816414
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  • 9
    Electronic Resource
    Electronic Resource
    Die kristallstruktur des kaliumtetragermanats K2[Ge4O9] (1971)
    Springer
    Monatshefte für Chemie 102 (1971), S. 1245-1254 
    Details
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Kristallstruktur des Kaliumtetragermanats, K2[Ge4O9], wurde mit Hilfe dreidimensionaler Röntgendaten bestimmt. K2[Ge4O9] kristallisiert trigonal mit der Raumgruppe P033034c1 (Nr. 165) und den Gitterparametern:a=11.84 undc=9.80 Å. Die vorgeschlagene strukturchemische Beziehung zum Wadeit, K2Zr[Si3O9], wird durch die Existenz tetraedrischer [Ge3O9]-Ringe, die über [GeO6]-Oktaeder zu einem dreidimensionalen Gerüst verknüpft sind, bestätigt. Es wurden folgende mittlere Ge−O-Abstände gefunden: 1.762 (Tetraeder) und 1.886 Å (Oktaeder).
    Notes: Abstract The crystal structure of potassium tetragermanate K2[Ge4O9] has been determined by means of three-dimensional x-ray data. K2[Ge4O9] crystallizes trigonal with space group P033034c1 (No. 165) and lattice parametersa=11.84 andc=9.80 Å. The proposed structural relationship to wadeite K2Zr[Si3O9] is confirmed by the existence of [Ge3O9] rings built by tetrahedra, which are linked by [GeO6] octahedra forming a three-dimensional network. The mean Ge−O distances are found to be: 1.762 (tetrahedra) and 1.886 Å (octahedra).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00917178
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  • 10
    Electronic Resource
    Electronic Resource
    Die Kristallstruktur des Lithiumheptagermanats Li2[Ge7O15] (1970)
    Springer
    Monatshefte für Chemie 101 (1970), S. 46-56 
    Details
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract The crystal structure of Li2[Ge7O15] has been determined by means of three-dimensional Patterson and electron density syntheses, and refined by least-squares method. The lattice parameters of the orthorhombic unit cell (Pbcn-D 2h 14 ) are:a=7.36,b=16.76 andc=9.69 Å. The crystal structure contains strongly puckered layers of [GeO4]-tetrahedra linked by [GeO6]-octahedra to form a three-dimensional framework; the structure can be characterized by the formula Li2[Ge(Ge2O5)3]. The averaged Ge−O-distances are found to be: 1.735 Å (c. n. 4) and 1.893 Å (c.n. 6).
    Notes: Zusammenfassung Die Kristallstruktur der Verbindung Li2[Ge7O15] wird mit Hilfe dreidimensionaler Patterson- und Fourier-Synthesen bestimmt und nach der Methode der kleinsten Quadrate verfeinert. Die Gitterparameter der orthorhombischen Elementarzelle (Pbcn — D 2h 14 ) betragen:a=7,36,b=16,76 undc=9,69 Å. Die Struktur enthält stark gewellte Schichten aus [GeO4]-Tetraedern, die über [GeO6]-Oktaeder zu einem dreidimensionalen Gerüst verknüpft sind; sie läßt sich durch die Formel Li2[Ge(Ge2O5)3] charakterisieren. Als mittlere Ge−O-Abstände werden erhalten: 1,735 Å (K.Z. 4) und 1,893 Å (K.Z. 6).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00907524
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