ionium

n.

嗳，钍（一种化学元素）；

ionium
Ionium dating of igneous rocks
Ionium Determination in Deep-Sea Sediments
Ratio of Ionium to Uranium in Coral Limestone
Analysis of Ore Residues for Ionium and Protactinium1
Radiochemical Determination of Ionium in Uranium Fluorination Ash
Geochronological studies of deep sea sediments by the ionium/thorium method
The transport and deposition of uranium, ionium and radium in rivers, oceans and ocean sediments ☆
Comparison of sedimentation rates measured by paleomagnetic and the ionium methods of age determination
Studies of the Solvent Extraction Behavior of the Transition Elements. II. Isolation of Gram Quantities of Th230 (Ionium) from a Pit...