>Dear all,
>
>The following is the microprobe analysis of a spheroidal fibrous
>white mineral locates at the contact between basaltic sill intruding
>country carbonate sedimentary:
>
>SiO2 57.50
>Al2O3 33.00
>Na2O 9.50
>
>Three is no similar in the mieralogy books.
>Could anyone have idea about the name of this mineral.
Mahrous and all,
The Na to Al ratio is about 1 to 2 so it is unlikely that this is a
zeolite. A sheet silicate or mixed layer silicate with a
paragonite-like component would fit better.
Question is the analysis really water free, or is this a normalized sum?
John Schumacher
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