Orthoclase

Chemistry

K2O16.920
Al2O318.320
SiO264.760

Links to Other Materials

Miscellaneous

Notes

(Richard Willis)

Mineral group, of the ideal form K(AlSi3O8)
The potassium-aluminum silicates designating a particular type of feldspar: the “potassium-feldspar”. The term ‘orthoclase’ is also used to refer in general to igneous rocks of significant potassium content together with an unusually high content of silica.



Authors

XML

<?xml version="1.0" encoding="UTF-8"?>
<material name="Orthoclase" descrip="" generic="0" rawmineral="1" searchkey="Potassium Feldspar, Monocline, Sanidine" loi="0.00">
<oxides>
<oxide symbol="K2O" name="Potassium Oxide" status="" percent="16.920" tolerance=""/>
<oxide symbol="Al2O3" name="Aluminum Oxide, Alumina" status="" percent="18.320" tolerance=""/>
<oxide symbol="SiO2" name="Silicon Dioxide, Silica" status="" percent="64.760" tolerance=""/>
</oxides>
<references>
<reference name="seealso" reason=""/>
<reference name="seealso" reason=""/>
</references>
<notes>
<note>&lt;B&gt;&lt;/B&gt;Mineral group, of the ideal form K(AlSi&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;O&lt;FONT SIZE=2&gt;&lt;SUB&gt;8&lt;/SUB&gt;&lt;/FONT&gt;)
The potassium-aluminum silicates designating a particular type of feldspar: the &amp;#147;potassium-feldspar&amp;#148;. The term &amp;#145;orthoclase&amp;#146; is also used to refer in general to igneous rocks of significant potassium content together with an unusually high content of silica.


</note>
</notes>
</material>



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