Das Element Hafnium

Das Element Hafnium

Georg v. Hevesy

84,87 €
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Editorial:
Springer Nature B.V.
Año de edición:
1927
ISBN:
9783642512551
84,87 €
IVA incluido
Disponible

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Die vorliegende Monographie enthält eine Zusammenfassung unserer derzeitigen Kenntnisse über die Eigenschaften und das Vorkommen des Hafniums. Kopenhagen, im September 1926. G. v. HEVESY. Inhaltsverzeichnis. Seite I. Entdeckung des Elements .......... . 1 Die röntgenspektroskopische Untersuchung ...... . 3 H. Die Trennung des Hafniums vom Zirkonium 4 A. Krystallisationsmethoden . . . . . . . . . . . . . . 4 Krystallisation der Doppelfluoride. - Krystallisation des Oxychlorids. - Krystallisation der Doppelsulfate des Ammo­ niums und Kaliums. - Krystallisation der Doppeloxalate des Ammoniums und Kaliums sowie des komplexen Oxalats. B. Fällungsmethoden . . . . . . . . . . . . . . . . . . . . 7 Fällung von Phosphaten und kom plexen Phosphaten. - Fällung mit Basen. - Fraktionierung durch Hydrolyse. - Fällung mit Wasserstoffsuperoxyd. - Fällung mit organischen Säuren. C. Trennung durch partielle Zersetzung und durch Destillation 11 Zersetzung des Sulfats. - Zersetzung der Ammoniumdoppel­ fluoride. - Sublimation und Destillation der Chloride. D. Weitere Trennungsmethoden ........ . 12 Diffusion und Ionenbeweglichkeit. IH. Die E i gen s c ha f t end e s H a f ums n i . 14 1. Das Atomgewicht . 14 2. Das Metall. . . . 15 Das Oxyd .... 3. 16 4. Die Doppelfluoride 17 Krystallstruktur d. Ammoniumdoppelfluorides. - Löslichkeit der Ammoniumdoppelfluoride. - Löslichkeit der Kalium­ doppelfluoride. - Brechungsindex der Doppelfluoride. 5. Das Oxychlorid. . . . . . . . . . . . . . 21 Löslichkeit. - Brechungsindex. 6. Das Phosphat . . . . . . . . . . . . . . 22 7. Das Acetylacetonat . . . . . . . . . . . . 24 Dichte. - Schmelzpunkt. - Sublimationstemperatur. Löslichkeit. - Krystallstruktur. 8. Das Röntgenspektrum. . . . . . . . . . . . 24 9. Das optische Spektrum . • . . . . . . . . .

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