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  • 1
    Electronic Resource
    Electronic Resource
    Ein neues Metagermanat: RbK[GeO3]-oligomere (Rb2GeO3) oder polymere (K2GeO3) Anionen [1]? (1993)
    Springer
    Monatshefte für Chemie 124 (1993), S. 529-537 
    Details
    ISSN: 1434-4475
    Keywords: Alkali metal metagermanate ; Crystal structure ; MAPLE calculations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary By heating a well ground mixture of the binary oxides RbO0.59, KO0.55 and GeO2[Rb:K:Ge=3.1:2.8:2; Ni-tube; 550 °C (27d) and 450 °C (22d)] colourless single crystals of Rb2K2[(GeO3)2] were obtained for the first time: space group Pnma witha=1322.51(14) pm,b=557.25(5) pm,c=1155.09(5) pm. The structure was determined by four-circle diffractometer data [Mo- $$K_{\bar \alpha }$$ , 1311 from 1362I 0(hkl),R=4.0%,R w =2.6%]. The Madelung Part of Lattice Energy, MAPLE, and the Effective Coordination Numbers, ECoN, the latter via Mean Fictive Ionic Radii, MEFIR, have been calculated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00819521
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  • 2
    Electronic Resource
    Electronic Resource
    Neue Alkalioxoarsenate (V) Zur Kenntnis von Rb2Li[AsO4] und Cs2Li[AsO4] (1992)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 610 (1992), S. 103-111 
    Details
    ISSN: 0044-2313
    Keywords: Alkali metal orthoarsenate ; crystal structure ; MAPLE calculations ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: New Alkalioxoarsenates (V). On Rb2Li[AsO4] and Cs2Li[AsO4]By heating of well-grounded mixtures of the binary oxides (A2O, Li2O2, and As2O3; A : Li : As = 2 : 1 : 1; Ni-tube, 550°C, 21 d; A = Rb, Cs) colourless single crystals of Rb2Li[AsO4] and Cs2Li[AsO4] were obtained for the first time. These new orthoarsenates(V) crystalize orthorhombic (space group C mc21—C2v12, No. 36) with Z = 4. As expected they are isotypic with the according orthovanadates(V) [2] A2Li[VO4], A = Rb, Cs. The lattice constants of Rb2Li[AsO4]: a = 582.1(4) pm, b = 1171.1(7) pm, c = 792.4(5) pm and Cs2Li[AsO4]: a = 596.4(2) pm, b = 1223.4(2) pm, c = 819.7(3) pm were taken from Guinier-Simon powder data. The structure was determined by four-circle-diffractometer data [Siemens AED II, MoKα, 6290 I0 (hkl), R = 3.5%, Rw = 3.2% to Rb2Li[AsO4]; 3518 I0 (hkl), R = 2.8%, Rw = 2.6% to Cs2Li[AsO4]; parameters see text]. The Madelung Part of Lattice Energy, MAPLE, and Effective Coordination Numbers, ECoN, these calculated via Mean Fictive Ionic Radii, MEFIR, as well as charge distribution CHARDI are calculated and discussed.
    Notes: Durch Tempern inniger Gemenge der binären Oxide (A2O, Li2O2 und As2O3; A : Li : As = 2 : 1 : 1; Ni-Bombe, 550°C, 21 d; A = Rb, Cs) wurden Rb2Li[AsO4] und Cs2Li[AsO4] erstmals in Form von farblosen Einkristallen erhalten. Die neuen Orthoarsenate(V) kristallisieren orthorhombisch (Raumgruppe C mc21—C2v12, Nr.36) mit Z = 4 und sind erwartungsgemäß isotyp zu den entsprechenden Orthovanadaten(V) [2] A2Li[VO4] mit A = Rb, Cs. Die Gitterkonstanten für Rb2Li[AsO4]: a = 582,1(4) pm, b = 1171,1(7) pm, c = 792,4(5) pm und Cs2Li[AsO4]: a = 596,4(2) pm, b = 1223,4(2) pm, c = 819,7(3) pm wurden aus Guinier-Simon-Pulverdaten ermittelt. Die Struktur wurde mittels Vierkreisdiffraktometerdaten [Siemens AED II, MoKα, 6290 I0 (hkl), R = 3,5%, Rw = 3,2% für Rb2Li[AsO4]; 3518 I0 (hkl), R = 2,8%, Rw = 2,6% für Cs2Li[AsO4]; Parameter siehe Text] bestimmt. Der Madelunganteil der Gitterenergie, MAPLE, und Effektive Koordinationszahlen, ECoN, diese über Mittlere Fiktive Ionenradien, MEFIR, sowie die Ladungsverteilung CHARDI werden berechnet und diskutiert.
    Additional Material: 16 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19926100117
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  • 3
    Electronic Resource
    Electronic Resource
    Ketten aus Ringen: K5{Li[Ge2O7]}  -  das erste „Litho-Digermanat“Professor Ulrich Wannagat zum 70. Geburtstage gewidmet. (1993)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 619 (1993), S. 811-818 
    Details
    ISSN: 0044-2313
    Keywords: Alkali metal digermanate ; preparation ; crystal structure ; MAPLE calculations ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chains consisting of Rings: K5{Li[Ge2O7]}  -  the First ‘Litho-Digermanate’By heating of a well-ground mixture of the binary oxides KO0.55, Li2O and GeO2 (K: Li: Ge = 6.1 : 2.2 : 2; Ni-tube; 600°C; 49 d) we obtained for the first time single crystals of K5{Li[Ge2O7]}. This ‘lithodigermanate’ represents a completely new type of structure: monoclinic, space group P21/c, a = 624.9(2) pm, b = 1586.6(8) pm; c = 1058.3(6) pm and β = 109.38(4)°; Guinier-Simon data, Z = 4. The structure was solved by four-circle diffractometer data [Siemens AED II, Mo—Kα; 2872 Io(hkl); R = 4.5%, Rw = 3.3%], parameters see text. The Madelung Part of Lattice Energy, MAPLE, and Effective Coordination Numbers, ECoN, these calculated via Mean Fictive Ionic Radii, MEFIR, as well as charge distribution CHARDI, are calculated and discussed.
    Notes: Durch Tempern inniger Gemenge der binären Oxide KO0,55, Li2O und GeO2 (K: Li: Ge = 6,1: 2,2: 2; Ni-Bömbchen; 600°C; 49 d) wurden erstmals Kristalle von K5{Li[Ge2O7]} erhalten. Das „Litho-Digermanat“ repräsentiert einen völlig neuen Strukturtyp, der „Ketten aus Ringen {Li[Ge2O7]5}“ enthält (monoklin, Raumgruppe P21/c mit a = 624,9(2) pm, b = 1 586,6(8) pm; c = 1058,3(6) pm und β = 109,38(4)°; Guinier-Simon Daten, Z = 4). Die Struktur wurde mittels Vierkreisdiffraktometerdaten [Siemens AED II; Mo—Kα; 2872 Io(hkl); R = 4,5%; Rw = 3,3%] bestimmt, Parameter siehe Text. Der Madelunganteil der Gitternergie, MAPLE, und Effektive Koordinationszahlen, ECoN, diese über Mittlere Fiktive Ionenradien, MEFIR, sowie die Ladungsverteilung CHARDI werden berechnet und diskutiert.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19936190502
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  • 4
    Electronic Resource
    Electronic Resource
    Neue Vertreter des A2A3′[MO4]-Typs: Rb2Na3[InO4], Cs2Na3[InO4] und Cs2Na3[TlO4] [1]Professor Kurt Dehnicke zum 60. Geburtstage gewidmet (1991)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 595 (1991), S. 95-114 
    Details
    ISSN: 0044-2313
    Keywords: A2A3′[MO4]-type oxides (M = In, Tl; A = Rb, Cs; A′ = Na) single crystal structures ; MAPLE calculations ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: New Examples of the A2A3′[MO4] Type: Rb2Na3[InO4], Cs2Na3[InO4], and Cs2Na3[TlO4]By exchange reactions the first examples of the A2A3′[MO4]-type with M = In, Tl and A = Rb, Cs Rb2Na3[InO4], Cs2Na3[InO4], and Cs2Na3[TlO4] were prepared in form of single crystals.(a)Rb2Na3[InO4]: colourless single crystals; heating intimate mixtures of a-Na5InO4 and Rb2O (Rb : In = 2.8 : 1, sealed Ni-tube; 300°C, 2 d; 620°C, 16 d), orthorhombic (Pnnm) with a = 971.1 (1), b = 950.0(1), c = 745.9 (1) pm, Z = 4; four-circle diffractometer data (Siemens AED 2, Mo-Kα, 9782Io(hkl), R = 5.7%, Rw = 4.5%). The new compound is isotypic to Na2Li3[GaO4] and K2Na3[InO4].(b)Cs2Na3[InO4]: light yellow single crystals; heating intimate mixtures of a-Na5InO4 and Cs2O (Cs : In = 5.0 : 1, sealed Au-tube, 260°C, 10 d; 600°C, 30 d), monoclinic (P21/c) with a = 634.8, b = 1026.7, c = 1254.6 pm, β = 111.52°, Z = 4, four-circle diffractometer data (Philips PW 1100, Ag-Kα, 6506 Io(hkl), R = 8.6%, Rw = 5.5%). The new compound is isotypic to K2Li3[GaO4].(c)Cs2Na3[TlO4]: orange single crystals, heating intimate mixture of a-Na5TlO4 and Cs2O (Cs : Tl = 2.3 : 1, sealed Ag-tube, 280°C, 3 d; 580°C, 30 d), monoclinic (P21/c) with a = 642.0, b = 1018.2, c = 1264.5 pm, β = 111.12°, Z = 4, four-circle diffractometer data (Philips PW 1100, Ag-Kα), 6391 Io(hkl), R = 15.4%, Rw = 9.1%). The new compound is isotypic to Cs2Na3[InO4].The Madelung part of lattice energy, MAPLE, and charge distributions for the three new oxides are calculated and discussed.
    Notes: Über Austauschreaktionen wurden mit Rb2Na3[InO4], Cs2Na3[InO4] und Cs2Na3[TlO4] die ersten Vertreter des Typs A2A3′[MO4] mit M = In bzw. Tl und A = Rb oder Cs in Form von Einkristallen dargestellt.(a)Rb2Na3[InO4]: farblose Einkristalle; Tempern inniger Gemenge von a-Na5InO4 und Rb2O (Rb : In = 2,8: 1; Ni-Bombe; 300°C, 2d; 620°C, 16d; orthorhombisch, Pnnm; a = 971,1 (1), b = 950,0 (1), c = 745,9 (1) pm; Z = 4; Vierkreisdiffraktometerdaten (Siemens AED 2; Mo - Kα; 9782 Io (hkl); R = 5,7%, Rw = 4,5%). Es liegt Isotypie zu Na2Li3[GaO4] und K2Na3[InO4] vor.(b)Cs2Na3[InO4]: hellgelbe Einkristalle; Tempern inniger Gemenge von a-Na5InO4 und Cs2O (Cs : In = 5,0 : 1; Au-Rohr; 260°C, 10 d; 600°C, 30 d); monoklin (P21/c) mit a = 634,8, b = 1026,7; c = 1254,6 pm, β = 111,52°; Z = 4; Vierkreisdiffraktometerdaten (Philips PW 1100, Ag-Kα, 6506 Io(hkl), R = 8,6%, Rw = 5,5%). Es liegt Isotypie zu K2Li3[GaO4] vor.(c)Cs2Na3[TlO4]: orangerote Einkristalle; Tempern inniger Gemenge von a-Na5TlO4 und Cs2O (Cs : Tl = 2,3 : 1; Ag-Bombe; 280°C, 3 d; 580°C, 30 d); monoklin (P21/c) mit a = 642,0, b = 1018,2, c = 1264,5 pm; β = 111,12°; Z = 4; Vierkreisdiffraktometerdaten (Philips PW 1100; Ag-Kα, 6391 Io(hkl), R = 15,4%, Rw = 9,1%). Die neue Verbindung ist isotyp zu Cs2Na3[InO4].Der Madelunganteil der Gitterenergie, MAPLE, und die Ladungsverteilung für die drei neuen Oxide werden berechnet und diskutiert.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19915950111
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