yellow-cake

Japanese: yellow-cake（英語表記）yellowcake

...When this solution is treated with alkali or ammonia, a yellow precipitate of diuranate (Na ₂ U ₂ O ₇ , (NH ₄ ) ₂ U ₂ O ₇ ) is obtained. This intermediate product is called yellow cake or uranium concentrate, and contains 70-80% uranium (U ₃ O ₈ equivalent). If the hydrochloric acid extract or the hydrochloric acid solution of the yellow cake is further reduced by electrolysis, the uranium becomes the tetravalent ion U ⁴⁺ , and by treating this with hydrogen fluoride, a precipitate of uranium tetrafluoride UF ₄ is obtained. ...

*Some of the terminology explanations that mention "yellow-cake" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…この溶液にアルカリやアンモニアを作用させると二ウラン酸塩(Na₂U₂O₇，(NH₄)₂U₂O₇)の黄色沈殿が得られる。この中間生成物がイェローケーキyellow‐cakeあるいはウラン精鉱と呼ばれるもので，これにはウランが70～80％(U₃O₈換算)含まれる。さらに先の塩酸抽出液，あるいはイェローケーキの塩酸溶液を電解還元すると，ウランは4価のイオンU^4＋となり，これにフッ化水素を作用させて四フッ化ウランUF₄の沈殿を得る。…