Horst,
The only vacancy substitution that would allow Li for Mg would be
on the oxygen site. One could also have LiF for MgO in olivine.
Eric
>Ed,
>
>You are right. Of course there is charge balance even for one single ion
>that is substituted. But for the low concentrations of <5 ppm this could be
>managed by vacancies, Al - Si sub., Fe3+, H, other trace elements,... It
>wouldn't be possible to detect the actual substitution partner in Olivin
>for 1 or 2 ppm Li.
>
>horst
>
>- -
>=================================
>Horst Marschall
>Mineralogisches Institut
>Universitaet Heidelberg
>INF 236
>69120 Heidelberg
>++49-(0)6221-546021
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