Mo Molybdenum pp 177-213 | Cite as

Molybdate Hydrates with Alkaline Earth Metals

  • Karl-Heinz Tytko
  • Wolf-Dietrich Fleischmann
  • Dieter Gras
  • Eberhard Warkentin
  • Hartmut Katscher
  • Friedrich Schröder
Part of the Gmelin Handbook of Inorganic Chemistry book series (GMELIN, volume M-o / A-B / B / 4)

Abstract

This system has been investigated at 25°C, see Fig. 66, p. 178. The following solid compounds have been found to exist in stable equilibria with the solution: Mg(OH)2, 8MgO · MoO3.48 H2O, 4 MgO · MoO3 ·12 H2O, MgMoO4 · 5 H2O, MgO · 3 MoO3 · 10 H2O, MoO3. The “trimolybdate” 10-hydrate is the only polymolybdate in this sequence [1]. The paramolybdate 3MgO · 7MoO3 · 20H2O was found to exist only in a metastable equilibrium [2]. Because of the slow equilibration when starting from MgO, MoO3, and H2O, the initial materials in this investigation were the compounds MgMoO4 · 5 H2O, MgO · 3 MoO3 · 10 H2O, and Mg3[Mo7O24] · 20 H2O. Selected points on the phase diagram are [1]:

Keywords

Crystallization Peroxide Magnesium Hydrate Uranium 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1985

Authors and Affiliations

  • Karl-Heinz Tytko
    • 1
  • Wolf-Dietrich Fleischmann
    • 2
  • Dieter Gras
    • 2
  • Eberhard Warkentin
    • 2
  • Hartmut Katscher
  • Friedrich Schröder
  1. 1.Universität GöttingenGermany
  2. 2.Gmelin-InstitutFrankfurt am MainGermany

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