The solubility of uranyl minerals controls the transport and distribution of uranium in many
oxidizing environments. Uranyl minerals form as secondary phases within uranium deposits …

Uranium minerals have been known since the discovery of U by Martin Heinrich Klaproth
1789, in when he obtained yellow powder of UO 3 from Saxonian pitchblende. However …

Approximately five percent of all known minerals contain U as an essential structural
constituent (Mandarino 1999). Uranium minerals display a remarkable structural and …

The crystal structures of uranyl minerals and inorganic uranyl compounds are important for
understanding the genesis of U deposits, the interaction of U mine and mill tailings with the …

By 1911, the atomic weight of uranium had been refined to 238.5 (Gmelin, vol. A2, 1980a).
The natural isotope 235 U was discovered in 1935 by mass spectrometry. The artificial …

Minerals containing peroxide are limited to studtite,(UO2) O2 (H2O) 4, and
metastudtite,(UO2) O2 (H2O) 2. High-temperature oxide-melt solution calorimetry and …

Abstract Studtite, UO4· 4H2O, and metastudtite, UO4· 2H2O, are the only minerals thought to
contain peroxide. Determination of the structure of studtite has shown it to contain peroxide …

The occurrence and binding energies of the U6+, U5+ and U4+ bands in the U 4f7/2 peak of
19 uranyl minerals of different composition and structure were measured by XPS. The …

The storage of spent nuclear fuels for long periods of time in geological repositories is one
proposed solution to the stewardship of legacy, current and future nuclear waste. Recent …

The mobility of uranium under oxidizing conditions can only be modeled if the
thermodynamic stabilities of the secondary uranyl minerals are known. Toward this end, we …