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  • Tungsten Dioxide

    Tungsten dioxide is the chemical compound with the formula WO2. The bronze-colored solid crystallizes in a monoclinic cell. The rutile-like structure features distorted octahedral WO6 centers with alternate short W–W bonds (248 pm). Each tungsten center has the d2 configuration, which gives the material a high electrical conductivity.

    WO2 is prepared by reduction of WO3 with tungsten powder over the course of 40 hours at 900 °C. An intermediate in this reaction is the partially reduced, mixed valence species W18O49.

    2 WO3 + W → 3 WO2

    The molybdenum analogue MoO2 is prepared similarly. Single crystals are obtained by chemical transport technique using iodine. Iodine transports the WO2 in the form of the volatile species WO2I2.

    Formula as often written: WO2

    Hill system formula: O2W1

    CAS registry number: 12036-22-5

    Formula weight: 215.839

    Class: oxide

    Physical properties

    Colour

    brown

    Appearance

    crystalline solid

    Melting point

    1500°C

    Boiling point

    1730°C

    Density

    10800 kg m-3

    Element analysis

    Element percentages for the elements in tungsten dioxide

    Element

    %

    W

    85.17

    O

    14.83

    If you have any interest in tungsten dioxide, please feel free to contact us by email: sales@chinatungsten.com or by telephone:+86 592 5129696.

    More info>>

    1.Tungsten Oxide

    2.Tungsten Trioxide

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