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Reactions with Arsenic

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W Tungsten

Part of the book series: Gmelin Handbook of Inorganic and Organometallic Chemistry - 8th Edition ((1058,volume W / A-B / A / 5 / b))

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Abstract

The intermediate phases W2As [1] and WAs2 [1 to 5] have been definitely identified in the W-As system. A phase analogous to Mo5As4 does not exist in the binary system, but appears in the W-Ti-As system at the approximate composition (W0 6Ti04)5As4. The occurrence of a phase W4AS5 is suggested by a rather complex X-ray pattern. W2As always contained free tungsten [1]. A monoarsenide WAs was reported [6]. The existence of a phase W2As3 has been postulated for the W-Ga-As system [7]. WAs2 produced from the elements at 620°C in a sealed tube (5 h, slight excess of As) had the composition WAs1954 (66.15 at% (44.3 wt%) As) [4]. It decomposes readily at low temperatures [1]. For reviews of the system, see [8 to 10].

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Authors and Affiliations

  1. Forschungsinstitut für Edelmetalle und Metallchemie, Germany

    Hermann Jehn

Authors
  1. Hermann Jehn
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  2. Schwäbisch Gmünd
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  3. Gudrun Bär
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  4. Erich Best
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  5. Ernst Koch
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Jörn von Jouanne Elisabeth Koch Ernst Koch

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© 1993 Springer-Verlag Berlin Heidelberg

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Jehn, H., Gmünd, S., Bär, G., Best, E., Koch, E. (1993). Reactions with Arsenic. In: von Jouanne, J., Koch, E., Koch, E. (eds) W Tungsten. Gmelin Handbook of Inorganic and Organometallic Chemistry - 8th Edition, vol W / A-B / A / 5 / b. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-08684-1_11

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  • DOI: https://doi.org/10.1007/978-3-662-08684-1_11

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-662-08686-5

  • Online ISBN: 978-3-662-08684-1

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