NGT28-1-02
1949
En ny metode til bestemmelse av innbyrdes mengdeforhold mellom visse finkornige mineraler.
28
1
21-26

A new method for determining clay minerals is described. The method is based on the high adsorbing power of clay minerals. The minerals are allowed to deposit on a photographic film through a diluted radium bromide solution. The clay minerals thus become radioactive whereas the other minerals remain non-radioactive. On the developed film the radioactive minerals distinguish themselves.

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