Iron oxalate (iron oxalate)

Japanese: シュウ酸鉄(蓚酸鉄) - しゅうさんてつ(英語表記)iron oxalate
Iron oxalate (iron oxalate)
Iron oxalates in the oxidation states II and III are known.
[Iron(II) oxalate]
Chemical formula: FeC 2 O 4 ・2H 2 O. It occurs naturally as humboltin. It can be obtained by dissolving iron in oxalic acid or by adding oxalic acid or an aqueous solution of an alkali oxalate to an aqueous solution of an iron(II) salt. Pale yellow crystalline powder. Orthorhombic crystal system. Specific gravity: 2.28. When heated in air, it decomposes at 150-160°C, and no anhydrate is obtained. It is sparingly soluble in water. Soluble in dilute inorganic acids and aqueous solutions of alkali oxalates.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
酸化数IIおよびIIIの鉄のシュウ酸塩が知られている。
[シュウ酸鉄(II)]
 化学式FeC2O4・2H2O。天然にフンボルチンとして産する。鉄をシュウ酸に溶かすか,鉄(II)塩水溶液にシュウ酸あるいはシュウ酸アルカリ水溶液を加えると得られる。淡黄色結晶性粉末。斜方晶系。比重2.28。空気中で加熱すると150~160℃で分解し,無水和物は得られない。水に難溶。希無機酸およびシュウ酸アルカリ水溶液に可溶。

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