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 …

Abstract Tetravalent actinides, An (IV), are usually assumed to be little mobile in near-neutral
environmental waters because of their low solubility. However, there are certain …

Rare earth elements (REEs), the 15 naturally occurring lanthanides plus yttrium and
scandium, are ubiquitously used in modern life as they are critical components of many …

Coffinite, USiO4, is an important U (IV) mineral, but its thermodynamic properties are not well-
constrained. In this work, two different coffinite samples were synthesized under …

In the UK, the decommissioning of legacy spent fuel storage facilities at the Sellafield
nuclear facility requires the retrieval of radioactive sludge resulting from Magnox fuel …

Coffinite, USiO4, is the second most abundant U4+ mineral on Earth, and its formation by the
alteration of the UO2 in spent nuclear fuel in a geologic repository may control the release of …

High-temperature oxide melt solution calorimetric measurements were completed to
determine the enthalpies of formation of the uranothorite,(USiO4) x–(ThSiO4) 1–x, solid …

Dissolution experiments have been performed in order to determine the solubility constant of
coffinite, USiO 4. Several assemblages of phases were used in under-saturated experiments …

Zircon-class ternary oxide compounds have an ideal chemical formula of ATO4, where A is
commonly a lanthanide and an actinide, with T= As, P, Si, or V. Their structure (I 41/amd) …

In this paper, the fundamental thermodynamic functions of six important uranyl carbonate
minerals, roubaultite, fontanite, widenmannite, grimselite, čejkaite and bayleyite, are …