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  • 1 National Institute of Nuclear Researchs Special Projects Coordination Col. Escandón, Deleg. Miguel Hidalgo P.O. Box 18-1027 11801 México (Mexico)
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A number of ammonium uranates have been obtained, all of them different in their X-ray diffraction patterns. This contribution attempts to demonstrate that different series of compounds can be produced depending on the preparation method. The ammonium uranates were precipitated from solutions of uranyl nitrate using gaseous ammonium to determine the effect of precipitation pH on their composition and morphology.