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Neue Fluororhodate(III). Zur Kenntnis von Pb2RhF7 und Sr2RhF7 (1983)

Domesle, R. ; Hoppe, R.

Weinheim : Wiley-Blackwell

Zeitschrift für anorganische Chemie 501 (1983), S. 102-110

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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: New Fluororhodates(III): On the Knowledge of Pb2RhF7 and Sr2RhF7New prepared are Pb2RhF7 and Sr2RhF7 (light carmine red resp. ochreous powders). Single crystals of Pb2RhF7 show monoclinic lattice constants: a = 5.569, b = 11.854, c = 8.832 Å. β = 91.00°, Z = 4, space group P21/c. Inspite of similar cell parameters the structure of Pb2RhF7 (4-circle diffractometer, MoKα, 2257 unique reflections, Rw = 8.1%) is different from K2NbF7. According to Pb2F[RhF6] one F- is coordinated to 3 Pb2+ only, while the other 6 F- form the distorted octahedron [RhF6]. Details of the structure are discussed using the Madelung Part of Lattice Energy, MAPLE, and Effective Coordination Numbers, ECoN. Sr2RhF7 is isotypic: a = 5.519, b = 11.668 c = 8.635 Å, β = 90.94°. Lattice constants for Sr2ScF7, Sr2InF7 and Ba2TlF7 are given.

Notes: Neu dargestellt wurden Pb2RhF7 und Sr2RhF7 in Form hellkarminroter bzw. ockerfarbener Pulver. Dunkelkarminrote Einkristalle von Pb2RhF7 kristallisieren monoklin mit a = 5,569, b = 11,854, c = 8,832 Å und β = 91,00°, Z = 4 in P21/c.Trotz ähnlicher Elementarzellenabmessungen ergab die Strukturbestimmung (Vierkreisdiffraktometer, MoKα, 2257 hkl, Rw = 8,1%) keine Isotypie mit K2NbF7. Vielmehr liegen entsprechend Pb2F[RhF6] verzerrt oktaedrische Baugruppen [RhF6] neben nur von drei Pb2+ koordinierten F- vor. Einzelheiten der Struktur werden unter Verwendung des Madelunganteils der Gitterenergie, MAPLE, und Effektiver Koordinationszahlen, ECoN, diskutiert.Sr2RhF7 ist isotyp: a = 5,519, b = 11,668, c = 8,635 Å, β = 90,94°. Erstmals werden Gitterkonstanten für Sr2ScF7, Sr2InF7 und Ba2TlF7 angegeben.

Additional Material: 2 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/zaac.19835010612

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Zur Kenntnis von BaAlF5 (1982)

Domesle, R. ; Hoppe, R.

Weinheim : Wiley-Blackwell

Zeitschrift für anorganische Chemie 495 (1982), S. 16-26

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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 the Knowledge of BaAlF5BaAlF5 occurs in three modifications. The hithertoo little characterized Low Temperature Form (LTF, α-BaAlF5) crystallizes orthorhombic with a = 13.710; b = 5.604; c = 4.930 Å, Z = 4, space group P212121 isotypic with BaGaF5. Single crystal data show that β-BaAlF5 has a monoclinic unit cell with a = 5.148; b = 19.556; c = 7.553 Å, β = 92.43°, Z = 8. The HTF γ-BaAlF5 a = 5.258; b = 9.724; c = 7.366 Å, β = 90.89°, Z = 4, obtained by quenching. Investigations by is monoclinic with DTA and quenching prove that α- transforms slowly and irreversible to β-BaAlF5 starting at 666°C. The reservible transformation β- to γ;BaAlF5 occurs at 789°C.

Notes: BaAlF5 bildet drei Modifikationen. Die Tieftemperaturform (TTF, α-BaAlF5) kristallisiert orthorhombisch mit a = 13,710; b = 5,604; c = 4,930 Å, Z = 4, Raumgruppe P212121, isotyp mit BaGaF5. Einkristalluntersuchungen an β-BaAlF5 belegen eine monokline Struktur mit a = 5,148; b = 19,556; c = 7,553 Å, β = 92,43°, Z = 8. Die durch Abschrecken der Präparate erhaltene HTF γ-BaAlF5 ist ebenfalls monoklin, a = 5,258; b = 9,724; c = 7,366 Å, β = 90,89°, Z = 4. Nach Temperversuchen und DTA-Messungen wandelt sich α-langsam irreversibel in β-BaAlF5 um. Der Übergang β- in γ-BaAlF5 erfolgt bei 789°C.

Additional Material: 1 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/zaac.19824950103

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Das erste Cyclo-Fluoroaluminat: Ba3Al2F12 = Ba6F4[Al4F20] (Mit einer Bemerkung über Ba3Ti2F10O2) (1982)

Domesle, R. ; Hoppe, R.

Weinheim : Wiley-Blackwell

Zeitschrift für anorganische Chemie 495 (1982), S. 27-38

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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: The First Cyclo-Fluoroaluminate: Ba3Al2F12 = Ba6F4[Al4F20] (with a Note on Ba3Ti2F10O2)For the first time the low Temperature Form of Ba3Al2F12 is prepared in form of transparent colourless single crystals by using a flux. Characteristical is the tetrameric group [(F4/1AlF2/2)4]8-. Space group Pnnm with a = 10.187; b = 9.869; c = 9.502 Å; Z = 4; dx = 4.82 and dpyk = 4.79 g · cm-3. For 1958 I0(hkl) [Four Circle Diffractometer PW 1100, MoKα, anisotropic temperature factors] is RW = 5.67 and R = 7.29. Parameters see text.The Madelung Part of Lattice Energy, MAPLE, is calculated and compared with the values for BaF2 and AlF3. Effective Coordination Numbers, ECoN, are given. The presence of the „ring“ is discussed.

Notes: Die Tieftemperaturform von Ba3Al2F12, erstmals aus dem Flux in Form wasserklarer Einkristalle erhalten, ist durch das Vorliegen tetramerer Baugruppen [(F4/1AlF2/2)4]8- charakterisiert. Raumgruppe Pnnm, a = 10,187; b = 9,869; c = 9,502 Å; Z = 4; drö = 4,82 und dpyk = 4,79 g · cm-3. für 1958 I0(hkl) [Vierkreisdiffraktometerdaten PW 1100, MoKα; anisotrope Temperaturfaktoren] ist RW = 5,67 und R = 7,29. Bez. der Parameter siehe Text.Der Madelunganteil der Gitterenergie, MAPLE, wird berechnet und mit den Werten der binären Fluoride verglichen, Effektive Koordinationszahlen, ECoN, angegeben und das Auftreten des „Ringes“ diskutiert.

Additional Material: 5 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/zaac.19824950104

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Zur Kenntnis von Ba2WO3F4 und weiterer Oxidfluoride mit Wolfram und Molybdän (1982)

Domesle, R. ; Hoppe, R.

Weinheim : Wiley-Blackwell

Zeitschrift für anorganische Chemie 492 (1982), S. 63-68

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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: Ba2W03F4 and Other Oxidefluorides of Tungsten and MolybdenumNew oxidefluorides are obtained in form of colourless powders by heating appropriate mixtures of the binary constituents: Ba2WO3F4 (a = 11.51 b = 9.38 c = 7.19 Å, β = 126.2° Z = 4, monoclinic, new type of structure) and the isotypic Ba2MoO3F4 (a = 11.46 b = 9.36 c = 7.24 Å, β = 126.3°, Z = 4) as well as PbWO3F2 (a = 20.86 c = 14.75 Å, Z = 64, tetragonal, isotypic with SrAlF5) and Pb3W2O6F6 (a = 20.65 c = 14.77 Å, tetragonal, Z = 24, isotypic with Sr3Fe2F12).

Notes: Neu dargestellt wurde Ba2WO3F4, nach Pulverdaten monoklin mit a = 11,51, b = 9,38 und c = 7,19 Å, β = 126,2°, Z = 4, eigener Typ, damit isotyp Ba2MoO3F4, a = 11,46, b = 9,36 und c = 7,24 Å, β = 126,3 (Pulverdaten) sowie PbWO3F2 (isotyp mit tetragonalem SrAlF5: a = 20,86, c = 14,75 Å, Z = 64, Pulverdaten) und Pb3W2O6F6, tetragonal, isotyp mit Sr3Fe2F12 (a = 20,65, c = 14,77 Å, Z = 24), jeweils aus den binären Komponenten. Alle neuen Oxidfluoride sehen farblos aus.

Additional Material: 4 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/zaac.19824920107

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