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  • Crystal Structure  (9)
  • Schlegel Diagrams  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 1447-1453 
    ISSN: 0044-2313
    Keywords: Cesium Sodium Titanate ; Rubidium Sodium Titanate ; Metatitanate ; Crystal Structure ; MAPLE ; CHARDI ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Two New Metatitanates with Five-coordinated Titanium: CsNaTiO3 and RbNaTiO3 [1]The new oxides CsNaTiO3 (I) and RbNaTiO3 (II) are obtained by heating well grounded mixtures of the binary oxides in Ni-tubes as colourless platelike crystals. I: CsO0.56, NaO0.48 and TiO2, Cs:Na:Ti = 1.1:1.1:1.0; 600°C, 61 d as well as CsO0.97, NaO0.48 and Ti2O3, Cs:Na:Ti = 1.5:3.0:1.0; 760°C, 27 d. II: RbO0.52, NaO0.48 and TiO2, Rb:Na:Ti = 1.1:1.1:1.0; 750°C, 14 d as well as RbO0.98, NaO0.48 and Ti2O3, Rb:Na:Ti = 1.5:3.1:1.0; 760°C, 27 d. CsNaTiO3 (orthorhombic, Cmcm) is nearly isostructural with KNaTiO3 [2]; a = 601.4(1) pm, b = 1 120.3(1) pm, c = 563.4(1) pm (Guinier-Simon-Data, Z = 4). RbNaTiO3 (monoclinic, C2/c) is isostructural with KNaTiO3; a = 590.3(1) pm, b = 1 098.4(1) pm, c = 555.1(0) pm, β = 92.15° (Guinier-Simon-Data, Z = 4). Both structures are determined by using four-circle diffractometer data (CsNaTiO3: Siemens AED2, 2 896Io(hkl), MoKα, R = 2.4%, Rw = 2.3%; RbNaTiO3: Philips PW 1 100, 2 743Io(hkl), AgKα, R = 9.9%, Rw = 8.9%; additional data see text).The Madelung Part of Lattice Energy (MAPLE), Effective Coordination Numbers (ECoN), Mean Fictive Ionic Radii (MEFIR) and the Charge Distribution in Solids are calculated and discussed.
    Notes: Die neuen Oxide CsNaTiO3 (I) und RbNaTiO3 (II) wurden durch Tempern inniger Gemenge der binären Oxide in Nickelzylindern als farblose plättchenförmige Kristalle erhalten. I: CsO0,56, NaO0,48 und TiO2, Cs:Na:Ti = 1,1:1,1:1,0; 600°C, 61 d sowie CsO0,97, NaO0,48 und Ti2O3, Cs:Na:Ti = 1,5:3,0:1,0; 760°C, 27 d. II: RbO0,52, NaO0,48 und TiO2, Rb:Na:Ti = 1,1:1,1:1,0; 750°C, 14 d sowie RbO0,98, NaO0,48 und Ti2O3, Rb:Na:Ti = 1,5:3,1:1,0; 760°C, 27 d.CsNaTiO3 (orthorhombisch, Cmcm) ist strukturell eng mit KNaTiO3 [2] verwandt; a = 601,4(1) pm, b = 1 120,3(1) pm, c = 563,4(1) pm (Guinier-Simon-Daten, Z = 4). RbNaTiO3 (monklin, C2/c) ist isotyp zu KNaTiO3; a = 590,3(1) pm, b = 1 098,4(1) pm, c = 555,1(0) pm, β = 92,15° (Guinier-Simon-Daten, Z = 4). Die Aufklärung beider Strukturen erfolgte mit Vierkreisdiffraktometerdaten (CsNaTiO3: Siemens AED2, 2 896Io(hkl), MoKα, R = 2,4%, Rw = 2,3%; RbNaTiO3: Philips PW 1 100, 2 743Io(hkl), AgKα, R = 9,9%, Rw = 8,9%; weitere Daten siehe Text).Für beide Verbindungen werden der Madelunganteil der Gitterenergie (MAPLE), Effektive Koordinatioszahlen (ECoN), Mittlere Fiktive Ionenradien (MEFIR) sowie die Ladungsverteilung (CHARDI) berechnet und diskutiert.
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 1019-1026 
    ISSN: 0044-2313
    Keywords: Rb2TiO3 ; Rubidium Metatitanate ; Crystal Structure ; MAPLE ; CHARDI ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: What does Solid State Mean?. New Molecular Aspects on the Example of Rb2[TiO3] [1], [2]Rb2TiO3 [3], parent type of the oxides K2CoO3, Rb2CoO3 and Cs2CoO3 [4], colourless crystals, needles, was newly obtained by heating a well grounded mixture of the binary oxides RbO0.98, RbO0.52, Ti2O3 (molar ratio = 2.4:6.2:1.0) 41 d at 780°C in Ni-Tubes.The first structure determination by using four-circle diffractometer data (Siemens AED2, 5366 Io(hkl), MoKα) leads to the residual-values R = 7.9% and Rw = 3.7%. Lattice constants (orthorhombic, Cmca, Z = 8, Guinier-Simon-data, CuKα1): a = 596.5(1) pm, b = 1185.2(1) pm, c = 1326.6(1) pm (additional data see text). The structure determination 1974 by filmdata is confirmed.The Madelung Part of Lattice Energy (MAPLE), Effective Coordination Numbers (ECoN), Mean Fictive Ionic Radii (MEFIR) and the Charge Distribution in Solids (CHARDI) are calculated and discussed.
    Notes: Rb2TiO3, [3], strukturell Muttertyp von Oxiden wie K2CoO3, Rb2CoO3 und Cs2CoO3 [4], farblose nadelförmige Kristalle, wurde durch 41tägiges Tempern inniger Gemenge der binären Oxide RbO0,98, RbO0,52 und Ti2O3 (molares Verhältnis = 2,4:6,2:1,0) in Ni-Zylindern bei 780°C erneut dargestellt.Diese erstmalige Strukturaufklärung mittels Vierkreisdiffraktometerdaten (Siemens AED2, 5366 Io(hkl), MoKα) führte zu den Residualwerten R = 7,9% und Rw = 3,7%. Gitterkonstanten (orthorhombisch, Cmca, Z = 8, Guinier-Simon-Daten, CuKα1): a = 596,5(1) pm, b = 1185,2(1) pm, c = 1326,6(1) pm (weitere Daten siehe Text). Die aus Filmdaten 1974 abgeleitete Struktur wird bestätigt.Der Madelunganteil der Gitterenergie (MAPLE), Effektive Koordinationszahlen (ECoN), Mittlere Fiktive Ionenradien (MEFIR) sowie die Ladungsverteilung (CHARDI) wurden berechnet und diskutiert.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 1557-1563 
    ISSN: 0044-2313
    Keywords: Tin and Lead Tetrafluoride ; Synthesis ; Crystal Structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Constitution of PbF4 with Structure Refinement of SnF4Colourless single crystals of SnF4 have been prepared heating powder samples of SnF4 in Pt-tubes (500°C, 20 d). Single crystals of PbF4 could be synthesized by pressure fluorination of «PbF4-x» and sublimation in autoclaves. The fluorides crystallize isostructural in space group I4/mmm with SnF4: a = 404.42(4) pm; c = 792.41(9) pm; Z = 2 and PbF4: a = 425.36(8) pm; c = 806.4(1) pm; Z = 2 (Guinier-de Wolff data, Cu-Kα1). The parameters ZF2 of both fluorides were refined from four-circle diffractometer data (Siemens AED 2) with SnF4: R1 = 1.5%; 1623 I0(hkl) and PbF4: R1 = 1.0%; 777 I0(hkl) (SHELXL-93). The structures correspond to the supposition by Hoppe and Dähne from 1962. The Madelung Part of Lattice and Molecule Energy, MAPLE and MAPME, Mean Fictive Ionic Radii, MEFIR, and Effective Coordination Numbers, ECoN, are calculated.
    Notes: Farblose Einkristalle von SnF4 wurden durch Tempern mikrokristalliner Proben in Pt-Rohr (500°C, 20 d), von PbF4 durch Druckfluorierung von ‚PbF4-x‘ und Sublimation im Fluorautoklaven bei 400°C erhalten. Die Fluoride kristallisieren isotyp in der tetragonalen Raumgruppe I4/mmm mit SnF4: a = 404,42(4) pm; c = 792,41(9) pm; Z = 2 und PbF4: a = 425,36(8) pm; c = 806,4(1) pm; Z = 2 (Guinier-de Wolff-Daten, Cu-Kα1). Die Parameter ZF2 wurden für beide Fluoride anhand von Vierkreisdiffraktometerdaten (Siemens AED 2) mit SnF4: R1 = 1,5%; 1623 I0(hkl) und PbF4: R1 = 1,0%; 777 I0(hkl) (SHELXL-93) verfeinert. Der Aufbau entspricht dem bereits 1962 von Hoppe und Dähne gemachten Vorschlag. Die Madelunganteile der Gitter- bzw. ‚Molekel‘-Energie, MAPLE bzw. MAPME, Mittlere Fiktive Ionenradien, MEFIR, sowie Effektive Koordinationszahlen, ECoN, werden berechnet.
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 591 (1990), S. 67-76 
    ISSN: 0044-2313
    Keywords: Rubidium Potassium Cobaltate ; Preparation ; Crystal Structure ; MAPLE Calculation ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Knowledge of Disorder Phenomena in Oxides with the Motive of Butterfly. On Rb2K4[O2CoOCoO2]For the first time Rb2K4Co2O5 was obtained by annealing intimate mixtures of the binary oxides as dark red single crystals (Rb:K:Co = 1.2:3.2:1; Ni-tube; 570°C; 20 d). Structure Refinement [fourcircle diffractometer data; PW 1100; AgKα- radiation; 401 of 607 I0(hkl); R = 9.9%; Rw = 5.5%; space group P42/mnm; Z = 2; a = 674,2(4), c = 1172,2(6) pm] confirms the isotypism to K2Na4Co2O5, Rb2Na4Co2O5 [2] and K2Na4Be2O5 [3]. The Madelung Part of Lattice Energy, MAPLE, Effektive Coordination Numbers, ECoN, these via Mean Fictive Ionic Radii, MEFIR, and the Charge Distribution, ΣQ, were calculated. The isotypism of Rb2K4Co2O5 and Rb2Na4Co2O5 is compared graphically.
    Notes: Rb2K4Co2O5 wurde erstmals durch Erhitzen inniger Gemenge der binären Oxide in Form von dunkelroten Einkristallen und Pulver erhalten (vor Verreiben Rb:K:Co = 1,2:3,2:1; Ni-Zylinder, 570°C, 20d). Die Strukturaufklärung [Vierkreisdiffraktometerdaten; PW 1100; AgKα--Strahlung; 401 von 607 I0 (hkl); R = 9,9%; Rw=5,5%; Raumgruppe P42/mnm; Z = 2; a = 674,2(4), c = 1172,2(6) pm] belegt die Isotypie zu K2Na4Co2O5, Rb2Na4Co2O5 [2] und K2Na4Be2O5 [3]. Der Madelunganteil der Gitterenergie, MAPLE, Effektive Koordinationszahlen, ECoN, diese über Mittlere Fiktive Ionenradien, MEFIR, sowie die Ladungsverteilung, ΣQ, wurden berechnet. Ein Isotypievergleich mit Rb2Na4Co2O5 erfolgt graphisch.
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 593 (1991), S. 17-34 
    ISSN: 0044-2313
    Keywords: Cesium Lithium Orthotitanate, Silicate ; Crystal Structure ; Schlegel Diagrams ; MAPLE Calculations ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Isotypism of Titanates and Silicates: About Cs2Li2[SiO4] and Cs2Li2[TiO4]For the first time colourless single crystals of Cs2Li2[SiO4] have been prepared by heating of a well ground mixture of the binary oxides CsO0.67, LiO0.5 and SiO2[Cs:Li:Si = 2.2:2.0:1.0; 450°C; 21 d] in tightly closed Ni tubes. The new oxosilicate crystallizes triclinic (space group P1 with a = 959.6(3), b = 577.4(2), c = 558.1(2) pm, α = 92.52(3)°, β = 110.93(3)°, γ = 94.45(3)°, Guinier-Simon powder data). The crystal structure was determined by four-circle diffractometer data [Siemens AED 2, 1612 I°(hkl), Z = 2, R = 7.2%, Rw = 6,5%], parameters see text.Cs2Li2[TiO4] has also been prepared as colourless single crystalls from CsO0.56, LiO0.5 und TiO2 (Cs:Li:Ti = 2.3:2.2:1.0; 650°C; 68 d, Ni tube) and investigated by x-ray [four-circle diffractometer data, Philips PW 1100, 2193 from 2383 I°(hkl). Z = 2, R = 7.6%, Rw = 6.1%, space group P1 with a = 951.0(1), b = 594.5(1), c = 582.6(1) pm, α = 93.11(1)°, β = 110.37(1), γ = 95.04(1)°, Guinier-Simon powder data]. The Madelung Part of Lattice Energy, MAPLE, and Effective Coordination Numbers, ECoN, these via Mean Fictive Ionic Radii, MEFIR, have been calculated. A detailed comparison of the structures is carried out.
    Notes: Erstmals wurden farblose Einkristalle von Cs2Li2[SiO4] durch Tempern inniger Gemenge der binären Oxide CsO0,67, LiO0,5 und SiO2 [Cs:Li:Si = 2,2:2,0:1,0; 450°C; 21 d] in fest verschlossenen Ni-Bömbchen erhalten. Es liegt Isotypie mit Rb2Li2[MO4] (M = Si, Ge, Ti) vor: triklin (Raumgruppe P1) mit a = 959,6(3) pm, b = 577,4(2) pm, c = 558,1(2) pm, α = 92,52(3)°, β = 110,93(3)°, γ = 94,45(3)°, (Guinier-Simon-Daten). Die Kristallstruktur wurde mittels Vierkreisdiffraktometerdaten aufgeklärt [Siemens AED 2, 1612 I°(hkl), Z = 2, R = 7,2%, Rw = 6,5%], Parameter siehe Text.Ebenfalls neu wurde Cs2Li2[TiO4] in Form farbloser Einkristalle durch Tempern inniger Gemenge von CsO0,56, LiO0,5 und TiO2 [Cs:Li:Ti = 2,3:2,2:1,0; 650°C; 68 d, Ag-Bömbchen] dargestellt und röntgenographisch untersucht. Die Strukturverfeinerung [Vierkreisdiffraktometerdaten, Philips PW 1100, 2193 von 2383 I°(hkl), Z = 2, R = 7,6%, Rw = 6,1%, Raumgruppe P1 mit a = 951,0(1) b = 594,5(1), c = 582,6(1) pm, α = 93,11°(1), β = 110,37(1)°, γ = 95,04(1)° Guinier-Simon-Daten] bestätigt auch hier Isotypie mit Rb2Li2[SiO4]. Der Madelunganteil der Gitterenergie, MAPLE, sowie Effektive Koordinationszahlen, ECoN, diese über Mittlere Fiktive Ionenradien, MEFIR, wurden berechnet. Für die nun bekannten Vertreter dieses Typs wurde ein Isotypievergleich vorgenommen.
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 594 (1991), S. 87-94 
    ISSN: 0044-2313
    Keywords: Potassium Sodium Oxoberyllate ; Single Crystal Structure ; Schlegel Diagrams ; MAPLE Calculations ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On K2Na4[O2BeOBeO2]For the first time colourless single crystals of K2Na4[Be2O5] which are isotypic with K2Na4[Co2O5] [2] and Rb2Na4[Co2O5] have been prepared by heating e.g. a well ground mixture of K2O, Na2O and BeO (K:Na:Be = 2.2:4.4:2; 750°C; 21 d; Ni-tube). The crystal structure was solved by four-circle diffractometer data [Siemens AED 2; 389 Io(hkl); space group P42/mnm; Z = 2; a = 595.17(4) pm, c = 1 002.66(9) pm; R = 4.1%; Rw = 2.3%].Mean Fictive Ionic Radii, MEFIR, Effective Coordination Numbers, ECoN, the Madelung Part of Lattice Energy, MAPLE, and the charge distribution are calculated.
    Notes: Erstmals wurde K2Na4[Be2O5], mit K2Na4[Co2O5] [2] und Rb2Na4[Co2O5] isotyp, in Form farbloser Einkristalle aus Gemengen von K2O, Na2O und BeO (K:Na:Be=2,2:4,4:2; 750°C; 21 d; Ni-Bombe), dargestellt. Die Kristallstruktur wurde über Vierkreisdiffraktometerdaten [Siemens AED 2; 389 Io(hkl); Raumgruppe P42/mnm; Z = 2; a = 595,17(4) pm, c = 1 002,66(9)pm; R = 4,1%; Rw = 2,3%] aufgeklärt. Mittlere Fiktive Ionenradien, MEFIR, Effektive Koordinationszahlen, ECoN, der Madelunganteil der Gitterenergie, MAPLE, sowie die Ladungsverteilung, wurden berechnet.
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 659-664 
    ISSN: 0044-2313
    Keywords: Tantalate Li7[TaO6] ; Single Crystals ; Crystal Structure ; MAPLE ; Charge Distribution ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On Tantalates ‘rich in Cations’ On Li7[TaO6]For the first time, colourless single crystals of Li7[TaO6] were grown by annealing intimate mixtures of Li2O and Ta2O5 (Li:Ta = 7,7:1) in closed Ni-cylinders (1 000°C, 156 d). [Trigonal-rhomboedral with a = 535.8(1) pm, c = 1 507.3(3) pm, c/a = 2.81/Guinier-Simon-powder data; Z = 3. Space group R3 for the part Li(1)6TaO6 and presumably P3 for Li7TaO6, including Li(2)].The crystal structure was solved by four-cycle-diffractometer data [Mo—Kα, 331 from 331 Io(hkl), R = 1.99%, Rw = 1.96%], parameters see text.The positions of anions correspond to the motif of a hexagonal closest packing of spheres, obviously deformed (with MEFIR of O2- space filling corresponds to 69.8% instead of expected 73.2%. 1/3 of the octahedron holes are ordered occupied by Ta and Li(2), 1/2 of the tetrahedral holes likewise ordered by Li(1). All polyhedra of coordination of the anions are trigonal prisms.The Madelung Part of Lattice Energy, MAPLE, and Effective Coordination Numbers, ECoN, these calculated via Mean Fictive Ionic Radii, as well as charge distribution ‘CHARDI’ are calculated and discussed.
    Notes: Erstmals wurden farblose Einkristalle von Li7[TaO6] durch Tempern inniger Gemenge von Li2O und Ta2O5 (Li:Ta = 7,7:1) in einem verschlossenen Ni-Zylinder (1 000°C, 156 d) dargestellt trigonal-rhomboedrisch; a = 535,8(1) pm, c = 1 507,3(3) pm, c/a = 2,81/Guinier-Simon-Pulverdaten; Z = 3. Raumgruppe R3 für den Li(1)6TaO6-Teil; vermutlich P3 für Li(1)6Li(2)1[TaO6].Die Kristallstruktur wurde mittels Vierkreisdiffraktometerdaten [Mo—Kα, 331 von 331 Io(hkl), R = 1,99%, Rw = 1,96%] bestimmt, Parameter siehe Text.Es liegt bezüglich der Anionen im Prinzip das Motiv einer hexagonal-dichtesten Kugelpackung vor; die Verzerrung ist deutlich mit MEFIR(O2-) = 154,3 pm beträgt die Raumerfüllung 69,8% statt ideal 73,2%). Es sind 2 der 6 Oktaeder- (mit Ta bzw. Li(2)) und 6 der 12 Tetrederlücken mit Li(1) besetzt. Alle Koordinationspolyeder um O sind trigonale Prismen.Der Madelunganteil der Gitterenergie, MAPLE, und Effektive Koordinationszahlen, ECoN, diese über Mittlere Fiktive Ionenradien, MEFIR, sowie die Ladungsverteilung ‘CHARDI’ wurden berechnet und diskutiert.
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 417-424 
    ISSN: 0044-2313
    Keywords: Cesium Hexafluoroplatinate(IV) ; Synthesis ; Crystal Structure ; MAPLE Analysis ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The First Fluoride A2[PtF6] of the K2PtCl6 Type: β-Cs2[PtF6]For the first time, yellow cubic single crystals of Cs2[PtF6] have been obtained by solid state reaction, heating (Pt-tube, 35 d, 800°C) the fluorination product of an intimate mixture of (NH4)2PtCl6 and 2 CsCl (diluted F2, F2:N2 = 1:5, 10 d, 400°C). The new form is isostructural with K2PtCl6: Fm3m; a = 905.5(2) pm; Z = 4 (Guinier-de Wolff data, CuKα1); R = 2.32% (SHELX-76); 1398 I0(hkl), Image-Plate diffractometer data (Stoe IPDS). It is compared with already known α-Cs2[PtF6] (K2GeF6-type, P3m1). The Madelung-Part of Lattice Energy, MAPLE, Effective Coordination Numbers, ECoN, and Mean Fictive Ionic Radii, MEFIR, are calculated and discussed in comparison with the data of further Hexafluoroplatinates(IV). A complete analysis of MAPLE was carried out for the title compound as well as for the α- and a hypothetical α′-form.
    Notes: Erstmals wurden gelbe, würfelförmige Einkristalle von Cs2[PtF6] durch Festkörperreaktion beim Tempern (Pt-Rohr, 35 d, 800°C) des mikrokristallinen Fluorierungsproduktes eines innigen Gemenges von (NH4)2PtCl6 und 2CsCl (verdünnter Fluorstrom, F2:N2 = 1:5, 10 d, 400°C) erhalten. Die neue Form ist isotyp zu K2PtCl6: Fm3m; a = 905,5(2) pm; Z = 4 (Guinier-de Wolff-Daten, Cu-Kα1); R = 2,32% (SHELX-76); 1398 I0(hkl), Image-Plate Diffraktometerdaten (Stoe IPDS). Sie wird mit bereits bekanntem α-Cs2[PtF6] (K2GeF6-Typ, P3m1) verglichen. Der Madelung-Anteil der Gitterenergie, MAPLE, Effektive Koordinationszahlen, ECoN, und Mittlere Fiktive Ionenradien, MEFIR, werden berechnet und im Vergleich mit entsprechenden Daten anderer Hexafluoroplatinate(IV) eingehend diskutiert. Für die Titelverbindung, die α- sowie eine hypothetische α′-Form werden vollständige MAPLE-Analysen durchgeführt.
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  • 9
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    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 1715-1720 
    ISSN: 0044-2313
    Keywords: Caesium Sodium Orthotitanate ; CsNa3[TiO4] ; Crystal Structure ; MAPLE, CHARDI ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The New Orthotitanate CsNa3[TiO4]Colourless, square stonelike single crystals of CsNa3[TiO4] [1], isostructural with CsNa3[PbO4] [2], are obtained by heating a well grounded mixture of the binary oxides CsO0,56, NaO0,52 and TiO2 (Cs : Na : Ti = 1,1:3,1:1,0) in Nitubes (9d, 400°C).The structure determination by using four-circle diffactometer data (Siemens AED2, 5541 Io(hkl), MoKα-) leads to the residual-values R = 8.8% and Rw = 4.7%. Lattice constants (triclinic, Cmca, P1, Z = 4, four-circle diffactometer data, MoKα-: a = 1161.2(6) pm, b = 854.9(3) pm, c = 651.1(3) pm, α = 100.52(2)°, β = 108.84(3)°, γ = 91.61(3)°; additional data see text).The Madelung Part of Lattice Energy (MAPLE), Effective Coordination Numbers (ECoN), Mean Fictive Ionic Radii (MEFIR) and the Charge Distribution in Solids (CHARDI) are calculated and discussed.
    Notes: Farblose quaderförmige Einkristalle von CsNa3[TiO4] [1], isotyp zu CsNa3[PbO4] [2], wurden durch Tempern inniger Gemenge der binären Oxide CsO0,56, NaO0,52 und TiO2 (Cs:Na:Ti = 1,1:3,1:1,0) in Ni-Zylindern (9 d, 400°C) erhalten.Die Strukturaufklärung mittels Vierkreisdiffraktometerdaten (Siemens AED2, 5541 Io(hkl), MoKα-) führte zu den Residualwerten R = 8,8% und Rw = 4,7%. Gitterkonstanten (triklin, P1, Z = 4, Vierkreisdiffraktometerdaten, MoKα-: a = 1161,2(6) pm, b = 854,9(3)pm, c = 651,1(3) pm, α = 100,52(2)°, β = 108,84(3)°, γ = 91,61(3)°, weitere Daten siehe Text).Der Madelunganteil der Gitterenergie (MAPLE), Effektive Koordinationszahlen (ECoN), Mittlere Fiktive Ionenradien (MEFIR) sowie die Ladungsverteilung (CHARDI) wurden berechnet und diskutiert.
    Additional Material: 5 Ill.
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 603-610 
    ISSN: 0044-2313
    Keywords: Rb3Na[TiO4] ; Rubidium Sodium Orthotitanate ; Crystal Structure ; MAPLE ; CHARDI ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On Unexpected Structural Relations: The New Orthotitanate Rb3Na[TiO4] [1]The new oxide Rb3Na[TiO4], platelike colourless crystals, was obtained by heating a well grounded mixture of the binary oxides in Ni-tubes. Therewith the oxides RbO0.52, NaO1.03, Ti2O3 (Rb:Na:Ti = 2.8:2.5:1.0) were heated for 26 d at 1000°C. Rb3Na[TiO4] (monoclinic, P21/c) is “isostructural” with Rb3Na[PbO4] [2] (lattice constants: a = 1076.3(3) pm, b = 638.8(4) pm, c = 1088.9(7) pm, β = 112.83(12)°; four-circle diffractometer data, Z = 4). The structure was determinated by using four-circle diffractometer data (Siemens AED2, 6683 I0(hkl), MoKα, R = 6.2%, Rw = 3.8%, additional data see text). The Madelung Part of Lattice Energy (MAPLE), Effective Coordination Numbers (ECoN), Mean Fictive Ionic Radii (MEFIR) and the Charge Distribution in Solids are calculated and discussed.
    Notes: Das neue Oxid Rb3Na[TiO4], farblose plättchenförmige Kristalle, wurde durch Tempern inniger Gemenge der binären Oxide in Ni-Zylindern erhalten. Dazu wurden die Oxide RbO0,52, NaO1,03 und Ti2O3 (Rb: Na: Ti = 2,8:2,5:1,0) 26 d bei 1000°C getempert. Rb3Na[TiO4] (monoklin, P21/c) ist „isotyp“ zu Rb3Na[PbO4] [2] (Gitterkonstanten: a = 1076,3(3) pm, b = 638,8(4) pm, c = 1088,9(7) pm, β = 112,83(12)°; Vierkreisdiffaktometerdaten, Z = 4). Die Aufklärung der Struktur erfolgte mit Vierkreisdiffraktometerdaten (Siemens AED2, 6683 I0(hkl), MoKα, R = 6,2%, Rw = 3,8%, weitere Daten siehe Text). Der Madelunganteil der Gitterenergie (MAPLE), Effektive Koordinationszahlen (ECoN), Mittlere Fiktive Ionenradien (MEFIR) sowie die Ladungsverteilung (CHARDI) wurden berechnet und diskutiert.
    Additional Material: 8 Ill.
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