Other
Scientific paper
Mar 1960
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1960gecoa..19...70f&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 19, Issue 1, pp.70-79
Other
7
Scientific paper
In calcium-containing minerals Ar 37 was produced with the aid of a ( n , ) reaction and the diffusion of Ar 37 was measured as a function of temperature. Owing to the high sensitivity of this method it was possible to measure diffusion constants down to room temperature. For fluorite, anorthite, augite and margarite the diffusion constants determined at room temperature are 10 -21 -10 -25 cm 2 /sec. These results are in agreement with those obtained by the potassium--argon age determination. The shape of the curves D (I/ T ) shows two knees which account for the discrepancy of the values obtained by other methods through extrapolation.
Fechtig Hugo
Gentner W.
Zähringer Josef
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