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Kobalt(II)-Orthosilicatsynthesen mittels Si02-Transport über SiF4 und Reaktion von CoF2 (fest) mit Si02 (fest)

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Published in Zeitschrift für anorganische und allgemeine Chemie. 1964, vol. 327, no. 1-2, p. 110-112
Abstract During studies of CoO-CoF2 mixts. in air at 1000 Deg, incomplete drying of air established the excellent transport property of the reaction SiO2 (s) + 4HF (g) = SiF4 (g) + 2H2O (g) (1). Traces of water in the air hydrolyze CoF2 to HF which reacts with SiO2 according to (1). Then the synthesis of Co2SiO4 proceeds by SiF4 (g) + 2CoF2 (g) + 4H2O (g) = Co2SiO4 (s) + 8HF (g) (2). The HF formed in (2) may react with CoO to produce CoF2. The possibility of 2CoF2 (g) + 2SiO2 (s) = Co2SiO4 (s) + SiF4 (g) is also considered. Carrier gas methods and closed transport cycles are contemplated in the extension of this gas phase synthesis to other metals.
Keywords Co2SiO4Chemical vapour transport
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SCHMID, Hans. Kobalt(II)-Orthosilicatsynthesen mittels Si02-Transport über SiF4 und Reaktion von CoF2 (fest) mit Si02 (fest). In: Zeitschrift für anorganische und allgemeine Chemie, 1964, vol. 327, n° 1-2, p. 110-112. https://archive-ouverte.unige.ch/unige:32466

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