ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 537-540 
    ISSN: 0044-2313
    Keywords: Antimony(V)-oxide chloride ; Synthesis ; IR Spectra ; Crystal Structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis, IR Spectrum, and Crystal Structure of Sb12O18(OH)2Cl22 · 2CH2Cl2The title compound has been prepared by the reaction of Sb5O7Cl11 with dichloromethane at 20°C, forming colourless, moisture sensitive crystals. Sb12O18(OH)2Cl22 · 2CH2Cl2 crystallizes monoclinically in the space group P21/n with two formula units per unit cell. Structure solution with 2696 unique observed reflections, R = 0.042. Lattice dimensions at 19°C: a = 1350.2, b = 1466.7, c = 1392.9 pm, b̃ = 97.925°. The distorted octahedrally coordinated antimony atoms, bridged by oxygen atoms, exhibit a molecular array which may be seen as a fragment of the rutile type structure, isolated by terminal chloride ligands. The solvate molecule is associated by a hydrogen bridge OH···Cl.
    Notes: Die Titelverbindung entsteht in Form farbloser Kristalle bei der Reaktion von Sb5O7Cl11 mit Dichlormethan bei 20°C. Sb12O18(OH)2Cl22 · 2CH2Cl2 kristallisiert monoklin in der Raumgruppe P21/n mit zwei Formeleinheiten pro Elementarzelle. Strukturlösung mit 2696 unabhängigen beobachteten Reflexen, R = 0,042. Gitterkonstanten bei 19°C: a = 1350,2; b = 1466,7; c = 1392,9 pm, b̃ = 97,925°. Die verzerrt oktaedrisch koordinierten und über Sauerstoffatome verbrückten Antimonatome bilden ein molekulares Gerüst, das als ein durch terminale Chlorliganden isolierter Ausschnitt aus der Rutilstruktur angesehen werden kann. Das Solvatmolekül ist durch eine Wasserstoffbrücke OH…Cl assoziiert.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 1573-1581 
    ISSN: 0044-2313
    Keywords: Weberite structure ; structure determination ; di-sodium iron vanadium hepta-fluoride ; di-sodium iron chromium hepta-fluoride ; di-sodium cobalt vanadium hepta-fluoride ; disodium cobalt chromium hepta-fluoride ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal Structure Determinations of Four Monoclinic Weberites Na2MIIMIIIF7 (MII = Fe, Co; MIII = V, Cr)By solid state reaction of the binary fluorides single crystals of the following weberites were prepared and their monoclinic structure (space group C2/c, Z = 16) determined by X-ray methods: Na2FeVF7 (a = 1 271.0(3), b = 742.9(1), c = 2 471.6(5) pm, β = 100.03(3)°; R1 = 0.043 (1 545 Reflexe); Fe—F = 203.8, V—F = 193.0 pm); Na2FeCrF7 (a = 1 262.5(3), b = 739.1(1), c = 2 460.5(5) pm, β = 99.93(3)°; R1 = 0.029 (2 340); Fe—F = 203.6, Cr—F = 190.5 pm); Na2CoVF7 (a = 1 270.3(5), b = 739.1(3), c = 2 465.1(10) pm, β = 100.02(3)°; R1 = 0.028 (2 250); Co—F = 201.6, V—F = 193.6 pm); Na2CoCrF7 (a = 1 257.8(3), b = 733.5(1), c = 2 441.5(5) pm, β = 99.64(3)°; R1 = 0.030 (2 227); Co—F = 201.2, Cr—F = 190.2 pm). Concerning the above average distances within the distorted [MF6] octahedra and the shape of [NaF8] coordination details are given and discussed.
    Notes: Durch Festkörperreaktion der binären Fluoride wurden Einkristalle der folgenden Weberite dargestellt und röntgenographisch deren monokline Struktur bestimmt (Raumgruppe C2/c, Z = 16): Na2FeVF7 (a = 1 271,0(3), b = 742,9(1), c = 2 471,6(5) pm, β = 100,03(3)°; R1 = 0,043 (1 545 Reflexe); Fe—F = 203,8, V—F = 193,0 pm); Na2FeCrF7 (a = 1 262,5(3), b = 739,1(1), c = 2 460,5(5) pm, β = 99,93(3)°; R1 = 0,029 (2 340); Fe—F = 203,6, Cr—F = 190,5 pm); Na2CoVF7 (a = 1 270,3(5), b = 739,1(3), c = 2 465,1(10) pm, β = 100,02(3)°; R1 = 0,028 (2 250); Co—F = 201,6, V—F = 193,6 pm); Na2CoCrF7 (a = 1 257,8(3), b = 733,5(1), c = 2 441,5(5) pm, β = 99,64(3)°; R1 = 0,030 (2 227); Co—F = 201,2, Cr—F = 190,2 pm). Zu den genannten mittleren Abständen in den verzerrten [MF6]-Oktaedern und zur Form der [NaF8]-Koordination werden Einzelheiten mitgeteilt und diskutiert.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 1614-1620 
    ISSN: 0044-2313
    Keywords: Structure determination ; vanadium weberites ; disodium metal(II) vanadium(III) heptafluorides ; sodium tetrafluoro-vanadate(III) ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Crystal Structures of the Vanadium Weberites Na2MIIVIIIF7 (MII = Mn, Ni, Cu) and of NaVF4At single crystals of the vanadium(III) compounds NaVF4 (a = 790.1, b = 531.7, c = 754.0 pm, β = 101.7°; P21/c, Z = 4), Na2NiVF7 (a = 726.0, b = 1031.9, c = 744.6 pm; Imma, Z = 4) and Na2CuVF7 (a = 717.6, b = 1043.5, c = 754.6 pm; Pmnb, Z = 4) X-ray structure determinations were performed, at Na2MnVF7 (a = 746.7, c = 1821.6 pm; P3221, Z = 6) a new refinement. NaVF4 crystallizes in the layer structure type of NaNbO2F2. The fluorides Na2MIIVF7 represent new orthorhombic (MII = Ni; Cu) resp. trigonal (MII = Mn) weberites. The average distances within the [VF6] octahedra of the four compounds are in good agreement with each other and with data of related fluorides (V—F: 193.3 pm). The differences between mean bond lengths of terminal and bridging F ligands are 5% in NaVF4, but less than 1% in the weberites. Details and data for comparison are discussed.
    Notes: An Einkristallen der Vanadium(III)-Verbindungen NaVF4 (a = 790,1, b = 531,7, c = 754,0 pm, β = 101,7°; P21/c, Z = 4), Na2NiVF7 (a = 726,0, b = 1031,9, c = 744,6 pm; Imma, Z = 4) und Na2CuVF7 (a = 717,6, b = 1043,5, c = 754,6 pm; Pmnb, Z = 4) wurden Röntgenstrukturbestimmungen durchgeführt, an Na2MnVF7 (a = 746,7, c = 1821,6 pm; P3221, Z = 6) eine neue Verfeinerung. NaVF4 kristallisiert in der Schichtstruktur des NaNbO2F2-Typs. Die Fluoride Na2MIIVF7 sind neue orthorhombische (MII = Ni; Cu) bzw. trigonale (MII = Mn) Weberit-Vertreter. Die mittleren Abstände in den [VF6]-Oktaedern der vier Verbindungen stimmen gut miteinander und mit Daten in verwandten Fluoriden überein (V—F: 193,3 pm). Die Unterschiede zwischen den mittleren Abständen terminaler und verbrückender F-Liganden betragen in NaVF4 5%, in den Weberiten aber weniger als 1%. Einzelheiten und Vergleichsdaten werden diskutiert.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 418 (1975), S. 193-207 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: High Pressure Syntheses and Transformations of Hexagonal Elpasolithes A2IBIMIIIF6Hexagonal-rhombohedrally in the structure type of Cs2NaCrF6 crystallizing elpasolithes Rb2LiMF6 and Cs2NaMF6 (MIII = Al, Ga, V, Cr, Fe) were transformed to cubic modifications (K2NaAlF6 type) by high pressure application (15-100 kbar). In addition intermediate high pressure phases with the hexagonal structure of high temperature K2LiAlF6 could be obtained in some cases. The lattice constants of these compounds are reported, as well as those of hexagonal elpasolithes Tl2LiMF6 and Cs2LiMF6 which only form, if they are synthesized under pressure. The results are discussed in connection with the Goldschmidt tolerance factor t′ = √2(rA + rF)/(rB + rM + 2rF) of the elpasolithes mentioned.
    Notes: Von hexagonal-rhomboedrisch im Cs2NaCrF6-Typ kristallisierenden Elpasolithen Rb2LiMF6 und Cs2NaMF6 (MIII = Al, Ga, V, Cr, Fe) konnten durch Hochdruckanwendung (15-100 kbar) kubische Modifikationen (K2NaAlF6-Typ) erhalten werden. Als intermediäre Hochdruckphasen ließen sich in einigen Fällen außerdem Modifikationen mit der hexagonalen Struktur von Hochtemperatur-K2LiAlF6 fassen. Die Gitterkonstanten dieser Verbindungen werden mitgeteilt, ebenso wie diejenigen neuer hexagonaler Elpasolithe Tl2LiMF6 und Cs2LiMF6, die sich nur bilden, wenn die Synthese unter Druck erfolgt. Die Ergebnisse werden im Zusammenhang mit dem Goldschmidtschen Toleranzfaktor t′ = √2(rA + rF)/(rB + rM + 2rF) der genannten Elpasolithe diskutiert.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Structures of Cesium-containing Fluorides. VIII. Cs7Ni4F15 and Cs7Co4F15: Crystal Structure Determination of the Hitherto Cesium-richest Compounds in the Corresponding Systems CsF/MF2.The only nickel-containing phase we could identify after solid state reaction 2 CsF + NiF2 was the compound Cs7Ni4F15. The single crystal structure determination of this monoclinic fluoride (and its cobalt analog Cs7Co4F15) yielded a = 787.2 (788.3), b = 1089.7 (1096.6), c = 1149.5 (1164.9) pm, β = 92.74 (92.59)°, space group P21/c, Z = 2, Rg = 0.045 (0.058) for 2543 (2716) independent reflections. The resulting strongly puckered layer structure rather than of single octahedra consists of face-sharing M2F9 units, which are connected via the half of their remaining corners. The M—F distances vary from 195.1 to 212.0 (196.7 to 217.0) pm and show unusual high mean values of 203.7 (206.5) pm. Data for comparison and further details are discussed.
    Notes: Als einzige nickelhaltige Phase bei der Festkörperreaktion 2 CsF + NiF2 konnten wir die Verbindung Cs7Ni4F15 identifizieren. Die Einkristallstrukturbestimmung an diesem monoklinen Fluorid (und der analogen Cobaltverbindung Cs7Co4F15) ergab: a = 787,2 (788,3), b = 1089,7 (1096,6), c = 1149,5 (1164,9) pm, β = 92,74 (92,59)°, Raumgruppe P21/c, Z = 2, Rg = 0,045 (0,058) für 2543 (2716) unabhängige Reflexe. Es liegt eine stark aufgerauhte Schichtstruktur vor, in der statt Einzeloktaedern nur flächenverknüpfte M2F9-Einheiten vorkommen, die über die Hälfte der verbleibenden Ecken miteinander verbunden sind. Die M—F-Abstände variieren von 195,1 bis 212,0 (196,7 bis 217,0) pm und sind im Mittel mit 203,7 (206,5) pm anomal groß. Vergleichsdaten und weitere Einzelheiten werden diskutiert.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Structures of Cesium-containing Fluorides. V. Pseudohexagonal Tungsten Bronze Structure of the Monoclinic Phase Cs0.4Zn0.4Fe1.6F6 and Related Cesium Transition Metal FluoridesThe crystal structure of the pseudohexagonale phase Cs0.4Zn0.4Fe1.6F6 was refined in the monoclinic space group P21 (a = 747.4, b = 763.6, c = 746.1 pm, β = 120.0°, z = 3). Using 1067 single crystal reflections R = 6.3% was reached. Compared to the hexagonal tungsten bronze structure the corner-sharing of octahedra shows pronounced angles also along the unique axis (M—F—M = 159.0°). The average bridge angle in the framework of tilted octahedra is 149.6°. Structural relations are discussed.
    Notes: Die Kristallstruktur der pseudohexagonalen Phase Cs0,4Zn0,4Fe1,6F6 konnte in der monoklinen Raumgruppe P21 (a = 747,4 b = 763,6, c = 746,1 pm, β = 120,0°, z = 3) unter Auswertung von 1 067 Einkristallreflexen auf R = 6,3% verfeinert werden. Im Vergleich zur Struktur der hexagonalen Wolframbronzen ist die Oktaeder-Eckenverknüpfung auch längs der ausgezeichneten Achse deutlich gewinkelt (M—F—M = 159,0°). Der mittlere Brückenwinkel im Raumnetz der verkippten Oktaeder beträgt 149,6°. Die Strukturverhältnisse werden diskutiert.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 442 (1978), S. 151-162 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Structures of Fluorides with Caesium. IV. The Crystal Structure of CsCrF4 - a Novel Tetra-fluorometallate Type with Chain StructureThe crystal structure of the hexagonal compound CsCrF4, crystallizing in space group P62m-D3h3, was determined: a =9.650(5), c = 3.857(3) Å, z = 3, R = 0.023 for 220 symmetrically independent reflections hkl. CsCrF4 is a new type of chain structure, containing three chains of octahedra sharing trans corners along [001] and connected by cis corners to form a triple chain. The bridging angles are Cr—F—Cr = 177.9° and 149.3°, the corresponding distances Cr—F = 1.929 and 1.940 Å, resp., compared to 1.851 Å for the terminal ligands. The results are discussed and relations to other structures shown.
    Notes: Die Kristallstruktur der hexagonal in der Raumgruppe P62,-D3h3 krikristallisierenden Verbindung CsCrF4 wurde bestimmt: a = 9,650(5), c = 3,857(3) Å, V = 311,1 Å3, z = 3, R = 0,023 für 220 symmetrieunabhängige Reflexe hkl. CsCrF4 stellt eine neuen Typ von Kettenstruktur dar, in dem drei längs [001] über trans-Ecken verknüpfte Oktaederketten miteinander über cis-Ecken zu einem Dreierstrang verbunden sind. Die Brückenwinkel betragen Cr—F—Cr 177,9° bzw. 149,3°, die entsprechenden Abstände Cr—F = 1,929 bzw. 1,940 Ä, gegenüber 1,851 Å für die terminalen Liganden. Die Ergebnisse werden diskutiert und Beziehungen zu anderen Strukturen aufgezeigt.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Single Crystal Structure Determinations of the Cubic High Pressure Elpasolites Rb2LiFeF6 and Cs2NaFeF6: Pressure-Distance Paradox without Change of Coordination NumberAt single crystals of metastable high pressure phases of Rb2LiFeF6 (a = 824.4 pm) and Cs2NaFeF6 (a = 873,9 pm) the parameters of the cubic elpasolite structure (Fm3m, Z = 4) were determined by X-ray methods. Compared to the 12L-structures of the normal pressure phases (R3m, hex. Z = 6) only the distances within the 12-coordination, Rb—F = 291.7 resp. Cs—F = 309.9 pm, are compressed by 2-3%. However, the octahedral distances Fe—F = 194.6 pm and Li—F = 217.6 pm resp. Fe—F = 194.9 pm and Na—F = 242.0 pm, are enlarged by 1-4%, though there was no increase in coordination number. This paradoxical behaviour is discussed. Difference Fourier syntheses reveal disorder only for the lithium positions in Rb2LiFeF6, which are 30 pm off-center, corresponding to a splitting of distances Li—F into 188, 247 and 4 × 220 pm.
    Notes: An Einkristallen der metastabilen Hochdruckphasen von Rb2LiFeF6 (a = 824,4 pm) und Cs2NaFeF6 (a = 873,9 pm) wurden röntgenographisch die Parameter der kubischen Elpasolithstruktur (Fm3m, Z = 4) bestimmt. Gegenüber den 12 L-Strukturen der Normaldruckphasen (R3m, hex. Z = 6) sind nur die Abstandswerte in der Zwölferkoordination, Rb—F = 291,7 bzw. Cs—F = 309,9 pm, um 2-3% verkleinert. Aber für die oktaedrischen Abstände Fe—F = 194,6 pm und Li—F = 217,6 pm bzw. Fe—F = 194,9 pm und Na—F = 242,0 pm ergeben sich Aufweitungen von 1-4%, obwohl keine Erhöhung der Koordinationszahl stattgefunden hat. Dieses paradoxe Verhalten wird diskutiert. Nur für die Lithiumpositionen in Rb2LiFeF6 zeigen Differenzfouriersynthesen eine Fehlordnung, die einer Li-Auslenkung von 30 pm aus dem Oktaederzentrum und einer Li—F-Abstandsaufspaltung in 188, 247 und 4 × 220 pm entspricht.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Tetragonal Fluoroperovskites AM0,75 □ 0,25F3 Deficient in Cations: K4MnIIM2IIIF12 and Ba2Cs2Cu3F12By heating 2KMnF3 + K2MnF6 and BaF2, CsF + CuF2 respectively, the isostructural tetragonal compounds K4Mn3F12 (a = 832.2, c = 1643.0 pm) and Ba2Cs2Cu3F12 (a = 854.1, c = 1704.1 pm) were prepared. They crystallize in a cation-deficient perovskite structure exhibiting ordering of octahedral vacancies. Single crystal structures determinations in the space group I41/amd, Z = 4, yielded the following average distances within the octahedra, which are Jahn-Teller distorted for MnIII and CuII:MnII—F = 208.3 pm, MnIII—F = 4 × 183.0/2 × 209.7 pm; Cu—F = 190.7/227.1 and 190.6/236.4 pm, respectively. The results are discussed in comparison with related compounds.
    Notes: Durch Erhitzen von 2KMnF3 + K2MnF6 bzw. von BaF2, CsF und CuF2 wurden die isostrukturellen tetragonalen Verbindungen K4Mn3F12 (a = 832,2, c = 1643,0 pm) bzw. Ba2Cs2Cu3F12 (a = 854,1, c = 1704,1 pm) hergestellt. Sie kristallisieren in einer kationendefizitären Perowskitstruktur mit geordneter Verteilung der zu einem Viertel unbesetzten Oktaederlücken. Die Einkristallstrukturbestimmungen in der Raumgruppe I41/amd, Z = 4, ergaben folgende mittlere Abstände in den für MnIII and CuII Jahn-Teller-verzerrten Oktaedern: MnII - F = 208,3 pm, MnIII—F = 4 × 183,0/2 × 209,7 pm; Cu—F = 190,7/227,1 bzw. 190,6/236,4 pm. Die Resultate werden im Vergleich mit verwandten Verbindungen diskutiert.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...