Ferrihydrite is poorly crystallized, which makes the determination of its structure more difficult. The distribution, composition, structure and nature are not yet very clear.
水铁矿结晶弱，结构表征困难，对其在环境中的分布、组成、结构及性质的认识较欠缺。
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In this paper, the distribution, composition, structure and environmental geochemical behaviors of ferrihydrite are reviewed. The prospective research areas on ferrihydrite are also proposed.