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formation of mfe2o4 was observed for m = mn (jacobsite), co, ni (trevorite), and zn (franklinite), and was in general favored by high temperatures, high ph, and the presence of nano3 or, especially, nacl in solution. α-feo(oh) is more reactive than α-fe2o3, but generally converts to the latter at 220–260°, independently of ph, in neutral or alkaline media.
on observe laformation de mfe2o4 pour m = mn (jacobsite), co, ni (trévorite) et zn (franklinite); cette réaction est généralement favorisée par de hautes températures, un ph élevé et la présence de nano3 ou, spécialement nacl en solution. α-feo(oh) est plus réactif que α-fe2o3, mais en général, il se transforme en ce dernier à 220–260°, indépendamment du ph, en milieu neutre ou alcalin.
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