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Ein neues Oxoberyllat: K4[Be3O5] (1990)

Schuldt, D. ; Hoppe, R.

Weinheim : Wiley-Blackwell

Zeitschrift für anorganische Chemie 591 (1990), S. 199-208

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ISSN: 0044-2313

Keywords: Chemistry ; Inorganic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Description / Table of Contents: On K4[Be3O5]Colourless crystals of K4Be3O5 resulted by heating intimate mixtures of KO0,51 and BeO (K:Be = 4.4:3) in tightly closed Ni-tubes. The crystal structure was determined (four-circle diffractometer data, MoKα, 1342 von 1342 I/(hkl), R = 6.1%, Rw = 3.0%). The new beryllate crystallizes monoclinic (Spacegroup C2/c) with a = 1038.1(3), b = 722.8(2), c = 1078.8(3) pm, β = 118.36(1)° (Guinier Simon powder data), Z = 4. Concerned to the chain ∞1[O2BeO2BeOBe]-the alternately sequence of the coordination number 4/3/3 is characteristic. The Madelung Part of Lattice Energy, MAPLE, and Effective Coordination Numbers, ECoN, these calculated via Mean Fictive Ionic Radii, MEFIR, are given.

Notes: Farblose Kristalle von K4Be3O5 entstanden beim Tempern inniger Gemenge von KO0,51 und BeO (K: Be = 4,4:3) in fest verschlossenen Ni-Bömbchen. Die Kristallstruktur wurde aufgeklärt (Vierkreisdiffraktometerdaten, MoKα, 1342 von 1342 Io(hkl), R = 5,1%, Rw = 3,0%). Das neue Beryllat kristallisiert monoklin (Raumgruppe C2/c) mit a = 1038,1(3), b = 722,8(2), c = 1078,8(3) pm, β = 118,36(1)° (Guinier-Simon-Pulverdaten), Z = 4. Charakteristisch ist die in der Kette ∞1[O2BeO2BeOBe] alternierende Abfolge der Koordinationszahl gemäß 4/3/3. Der Madelunganteil der Gitterenergie, MAPLE, sowie Effektive Koordinationszahlen, ECoN, diese über Mittlere Fiktive Ionenradien, MEFIR, berechnet, werden angegeben.

Additional Material: 3 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/zaac.19905910124

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Ein neues Oxoberyllat: K2Na4[O2BeOBeO2]Frau Professor Marianne Baudler zum 70. Geburtstage am 27. April 1991 gewidmet (1991)

Schuldt, D. ; Hoppe, R.

Weinheim : Wiley-Blackwell

Zeitschrift für anorganische Chemie 594 (1991), S. 87-94

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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.

Additional Material: 2 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/zaac.19915940110

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Neue Beryllate der Alkalimetalle: Na6Be8O11 (1988)

Hoppe, R. ; Schuldt, D.

Weinheim : Wiley-Blackwell

Zeitschrift für anorganische Chemie 564 (1988), S. 61-71

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ISSN: 0044-2313

Keywords: Chemistry ; Inorganic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Description / Table of Contents: Novel Beryllates of the Alkali Metals: Na6Be8O11For the first time transparent, colourless single crystals of Na6Be8O11 have been prepared (Na2O/BeO; Na:Be = 6:8, Ni-tube; 650°, 14 d). The compound crystallizes triclinic (P1) with a = 532.1(1) pm, b = 642.4(2) pm, c = 839.1(2) pm, α = 101.7°, γ = 105.8°, Z = 2, dx = 2.42 g/cm3, dpyk=2.51 g/cm3. The crystal structure was solved by four-circle diffractometer data [Siemens AED 2, MoKα, R = 7.9%, Rw = 6.2%, 1429 I0(hkl)].Effektive Coordination Numbers, ECoN, these via Mean Fictive Ionic Radii, MEFIR, are calculated.

Notes: Neu dargestellt wurde Na6Be8O11 in Form trikliner, farblos-durchsichtiger Einkristalle [a = 532,1(1) pm, c = 839,1(2) pm, α = 101,7°, β = 96,4°, γ = 105,8°, Z = 2, dx = 2,42 g/cm3, dpyk = 2,51 g/cm3]. Die Kristallstruktur wurde über Vierkreisdiffraktometerdaten [Siemens AED 2, MoKα, R = 7,9%, Rw = 6,2%, für 1429 von 1459 I0(hkl)] aufgeklärt. Na6Be8O11 ist gegenüber Luftfeuchtigkeit empfindlich.Effektive Koordinationszahlen, ECoN, diese über Mittlere Fiktive Ionenradien, MEFIR, werden berechnet.

Additional Material: 7 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/zaac.19885640108

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Über Synthese und Aufbau von Na2[BeO2]: Na8 [OBeO2BeO2BeO2BeO] (1989)

Schuldt, D. ; Hoppe, R.

Weinheim : Wiley-Blackwell

Zeitschrift für anorganische Chemie 578 (1989), S. 119-132

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ISSN: 0044-2313

Keywords: Chemistry ; Inorganic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Description / Table of Contents: Novel Beryllate of a Alkali Metal: Na2[BeO2]For the first time transparent, colourless single crystals of Na2[BeO2] have been prepared (Na2O/BeO; Na:Be = 2.2:1.0; Ni-tube, 750°C, 21 d). The compound crystallizes monoclinic (P21) with a = 1152.0 pm, b = 530.8 pm, c = 788.2 pm, β = 99.2°, Z = 8. The crystal structure was solved by four-circle diffractometer data (PW 1100, 3608 I0(hkl); R = 9.9%, RW = 8.0%). Na8[Be4O8] is isotypic with Rb8[Zn4O8]. One part of Be2+ is coordinated by 4 the other part by 3 O2-. The Madelung Part of Lattice Energy, MAPLE, and Effective Coordination Numbers, ECoN, are calculated.

Notes: Erstmals konnten durchsichtige, farblose Einkristalle von Na2[BeO2] dargestellt werden (Na2O/BeO; Na:Be = 2,2:1,0; Ni-Bömbchen, 750°C, 21 Tage). Na2[BeO2] kristallisiert monoklin (P21) mit a = 1152,0 pm, b = 530,8 pm, c = 788,2 pm, β = 99,3°, Z = 8. Die Kristallstruktur wurde über Vierkreisdiffraktometerdaten [PW 1100, 3608 I0(hkl), R = 9,9%, Rw = 8,0%] aufgeklärt, Gemäß Na8[Be4O8] liegt Isotypie mit Rb8[Zn4O8] vor. Be2+ hat je zur Hälfte C.N. 4 (tetraedrisch) bzw. 3 (planar). Der Madelunganteil der Gitterenergie, MAPLE, sowie Effektive Koordinationszahlen, ECoN, werden berechnet.

Additional Material: 5 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/zaac.19895780114

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