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The distribution of Sr and REE between diopside and silicate liquidExperimental determination of the distribution coefficients in diopside-liquid pairs for strontium and nine rare-earth elements in the system CaMgSi2O6-NaAlSi3O8-CaAl2Si2O8. In experiments in air at 1265 C it is found that most of the Sr(2+), Eu(2+), and RE(3+) ions substitute for Ca(2+) and, in addition, a coupled substitution of Al(3+) for Si(4+) occurs. All of the trace ions considered are found to be excluded from the diopside lattice relative to the liquid. In the case of the trivalent ions the exclusion is much more pronounced for La and Ce, which have ionic radii larger than that of Ca(2+) in 8-fold oxygen coordination. Divalent Sr and Eu with even larger radii are also strongly excluded.
Document ID
19750027184
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Grutzeck, M.
Kridelbaugh, S.
Weill, D.
(Oregon, University Eugene, Ore., United States)
Date Acquired
August 8, 2013
Publication Date
October 1, 1974
Publication Information
Publication: Geophysical Research Letters
Volume: 1
Subject Category
Inorganic And Physical Chemistry
Accession Number
75A11256
Funding Number(s)
CONTRACT_GRANT: NGL-38-003-020
Distribution Limits
Public
Copyright
Other

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