Compound Formation and Phase Relation in the System PbO-V<sub>2</sub>O<sub>5</sub>
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- SHIMOHIRA Takajiro
- Gunma University
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- IWAI Shinichi
- Tokyo Institute of Technology
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- TAGAI Hideo
- Tokyo Institute of Technology
Bibliographic Information
- Other Title
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- PbO-V<sub>2</sub>O<sub>5</sub>系の相関係と系内生成化合物
- PbO-V2O5ケイ ノ ソウカンガカリ ト ケイナイ セイセイ カゴウブツ
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Description
Amadori's result of the phase diagram PbO-V2O5 are re-examined. Solidus and liquidus points of the various mixtures heated in a micro-furnace were determined with the naked eye through a binocular microscope.<br>In addition to 8PbO⋅V2O5, 3PbO⋅V2O5 and 2PbO⋅V2O5, they have already been reported, a new incongruent compound having a molecular formula of 4PbO⋅V2O5 was identified.<br>Four eutectic compositions occur at 7.3% (mole) V2O5 (761°C), 16.5% V2O5 (760°C) 31.7% V2O5 (725°C) and 50% V2O5 (502°C).<br>Although the 8PbO⋅V2O5 crystals might have pseudo tetragonal symmetry having unit cell dimensions of a=5.316Å and c=5.694Å tentatively, but unit cell dimension having a=5.65Å, b=10.71Å, c=7.47Å and β≅90° with monoclinic symmetry are obtained by oscillation photographs of the single crystals.<br>The number of fomula units in this monoclinic lattice were almost unity.<br>Although distorted hexagonal lattice having unit cell dimensions of a=5.78Å, c=20.47Å and c/a=3.53 are postulated for 3PbO⋅V2O5, unit cell dimensions of 4PbO⋅V2O5 and 2PbO⋅V2O5 are indeterminate yet.
Journal
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- Journal of the Ceramic Association, Japan
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Journal of the Ceramic Association, Japan 75 (868), 352-358, 1967
The Ceramic Society of Japan
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Details 詳細情報について
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- CRID
- 1390001205249898880
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- NII Article ID
- 110002304652
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- NII Book ID
- AN00245650
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- ISSN
- 18842127
- 00090255
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- NDL BIB ID
- 8468114
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed