ionium age 钍年积
ionium-excess dating method 鑀过剩法
ionium-deficiency dating method 鑀亏损法
ionium-radium geochronology 鑀–镭地质年代学
Ionium Records 出版者
uranium-ionium geochronology 地质年代学
Ionium Mare 伊奥尼亚海
N a naturally occurring radioisotope of thorium with a mass number of 230 锾 ( symbol: Io) [OBSOLETE]
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