General Information
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Chemical
Formula: |
KAlSi3O8 |
Composition: |
Molecular Weight = 278.33 gm |
|
Potassium 14.05 % K 16.92 % K2O |
|
Aluminium 9.69 % Al 18.32 % Al2O3 |
|
Silicon 30.27 % Si 64.76 % SiO2 |
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Oxygen 45.99 % O |
|
______ ______ |
|
100.00 % 100.00 % = TOTAL OxIDE |
Empirical
Formula: |
KAlSi3O8 |
Environment: |
Intrusive and
extrusive igneous,
and metamorphic rocks. |
IMA
Status: |
Approved IMA 1960 |
Locality: |
Common world wide
occurrences. Madagascar |
Name
Origin: |
From the Greek orthos -
"right" and kalo -" I cleave" in allusion to the
mineral's right angle of good cleavage. |
Synonym: |
Adularia |