Production method of goethite

A method for producing goethite particles by oxidizing a ferrous hydroxide suspension, which has been obtained by reacting a ferrous salt solution with an alkali hydroxide solution, with an oxidizing gas, which method comprises intermittently feeding the oxidizing gas into the suspension, the oxidation percentage of ferrous hydroxide being 10 percent or less per time period of feeding and feed-stopping of the oxidizing gas, the feeding time period of the oxidizing gas being 10 minutes or shorter and shorter than a quarter of the feed-stopping time period of the oxidizing gas, the number of cycles of feeding and feed-stopping of the oxidizing gas being at least 10 times, and the oxidation being carried out by feeding and feed-stopping oxidizing gas at a temperature ranging to 20.degree. to 80.degree. C., until essentially all the ferrous hydroxide has been oxidized to goethite said method being conduced in a single stirred-type reactor, said geothite particles having a particle specific surface area of from 20 to 80 m.sup.2 /g, an axial ratio of least 7 and a coefficient of variation of 47.7 percent or less.