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Atomistry » Bismuth » Chemical Properties » Bismuth Arsenate | ||
Atomistry » Bismuth » Chemical Properties » Bismuth Arsenate » |
Bismuth Arsenate, BiAsO4
Bismuth Arsenate probably occurs naturally in the minerals atelestite, rhagite, walpurgite and mixite. It may be obtained as a white crystalline substance by the action of arsenic acid or alkali arsenate upon a nitric acid solution of bismuth nitrate. The hemihydrate, BiAsO4.½H2O, which loses water only when heated strongly, forms microscopic monoclinic prisms, density (at 15° C.) 7.142; it is tasteless and melts only with difficulty. A basic arsenate, 2BiAsO4.3Bi2O3, has also been prepared by the action of sodium arsenate upon an ammoniacal solution of bismuth citrate. It forms a gelatinous precipitate, which resembles the corresponding phosphate in its chemical properties.
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