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Additional
andesine
English Wikipedia - The Free Encyclopedia
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Andesine
Andesine
is a
silicate mineral
, a member of the
plagioclase
feldspar
solid solution
series. Its chemical formula is (
Ca
,
Na
)(
Al
,
Si
)
4
O
8
, where Ca/(Ca + Na) (%
Anorthite
) is between 30%-50%. The formula may be written as Na
0.7-0.5
Ca
0.3-0.5
Al
1.3-1.5
Si
2.7-2.5
O
8
.
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