TY - JOUR
T1 - Hydrothermal Dissolution of Perovskite
T2 - Implications for Synroc Formulation
AU - Kastrissios, Theodora
AU - Stephenson, Mark
AU - Turner, Peter S.
AU - White, Timothy J.
PY - 1987/7
Y1 - 1987/7
N2 - The results of a transmission electron microscope study of the hydrothermal alteration products formed by perovskite and two titantate‐based “synroc” formulations are reported. It was found that perovskite, the host phase for strontium‐90, dissolved at combined temperatures and pressures greater than 110°C and 180 kPa. Dissolution of perovskite was accompanied by an epitaxial crystallization of the titanium dioxide polymorphs, brookite and anatase. Hollandite, which incorporates cesium‐137, dissolved more slowly than perovskite, with only minor TiO2 crystallization. Intergrowths of zirconolite and zirkelite, the principal actinide‐containing phases, were highly resistant to hydrothermal treatments, maintaining their integrity under all experimental conditions.
AB - The results of a transmission electron microscope study of the hydrothermal alteration products formed by perovskite and two titantate‐based “synroc” formulations are reported. It was found that perovskite, the host phase for strontium‐90, dissolved at combined temperatures and pressures greater than 110°C and 180 kPa. Dissolution of perovskite was accompanied by an epitaxial crystallization of the titanium dioxide polymorphs, brookite and anatase. Hollandite, which incorporates cesium‐137, dissolved more slowly than perovskite, with only minor TiO2 crystallization. Intergrowths of zirconolite and zirkelite, the principal actinide‐containing phases, were highly resistant to hydrothermal treatments, maintaining their integrity under all experimental conditions.
UR - http://www.scopus.com/inward/record.url?scp=0023382308&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0023382308&partnerID=8YFLogxK
U2 - 10.1111/j.1151-2916.1987.tb05689.x
DO - 10.1111/j.1151-2916.1987.tb05689.x
M3 - Article
AN - SCOPUS:0023382308
SN - 0002-7820
VL - 70
SP - C‐144-C‐146
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 7
ER -