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ACTIVITY MEASUREMENTS BY KNUDSEN CELL MASS-SPECTROMETRY - THE SYSTEM FE-CO-NI AND IMPLICATIONS FOR CONDENSATION PROCESSES IN THE SOLAR NEBULA

Abstract:

We report the use of new apparatus for the direct determination of the activities of components in minerals and melts by the measurement of their intrinsic vapour pressures at high temperatures using a Knudsen-cell mass spectrometer combination. The activity coefficients of Fe, Ni and Co have been determined using this technique in binary and ternary Fe-Co-Ni alloys over the temperature range 1200-1650°C. The results show negative deviations from ideality in the Fe-Ni system and both positive...

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Publication status:
Published

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Authors


RAMMENSEE, W More by this author
Journal:
GEOCHIMICA ET COSMOCHIMICA ACTA
Volume:
46
Issue:
4
Pages:
549-556
Publication date:
1982
DOI:
ISSN:
0016-7037
URN:
uuid:255e1c1f-f1d6-46c4-b39c-9da29c2bfc4e
Source identifiers:
170079
Local pid:
pubs:170079
Language:
English

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