Abstract

"Twelve davidites from several localities and of different parageneses have been analysed for U and individual rare earths. The abundance of the total lanthanons invariably exceeds that of Yt and the distribution of the individual lanthanons is strikingly similar for all specimens: both the heavy and light lanthanons are more abundant than the middle lanthanons. La generally exceeds Ce and may exceed the sum of the remaining lanthanons."

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