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POTASSIUM FELDSPARS

Miscellaneous

• Family: Feldspar
• Region: None
• Mined At: Unspecified
• Raw Mineral: Yes
• Generic: No

Notes

(Richard Willis)

Any of the potassium-bearing aluminosilicate minerals, the paradigm being the orthoclase group in general and sanidine in particular. see alkali, alkali feldspar, feldspar, feldspathoid, feldspathic earths, plagioclase, orthoclase, etc.
feldspar groups & their occurrences
sanidine: potassium-rich volcanic rocks and near-surface minor intrusions — e.g., rhyolites and trachytes
orthoclase: potassium-rich dike rocks — e.g., rhyolite and trachyte porphyries; granites, granodiorites, and syenites; arkose moderate-to high-grade metamorphic gneisses and schists
microcline: granitic pegmatites, hydrothermal veins granites, granodiorites, and syenites;arkose; low-to-moderate-grade metamorphic rocks

Authors

• Richard Willis (Owner)

XML

<?xml version="1.0" encoding="UTF-8"?>
<material name="POTASSIUM FELDSPARS" descrip="" generic="0" rawmineral="1" searchkey="" loi="0.00">
<families>
<family name="Feldspar"/>
</families>
<notes>
<note>Any of the potassium-bearing aluminosilicate minerals, the paradigm being the orthoclase group in general and sanidine in particular. &lt;FONT SIZE=2&gt;see &lt;B&gt;&lt;I&gt;alkali&lt;/I&gt;&lt;/B&gt;, alkali &lt;B&gt;&lt;I&gt;feldspar&lt;/I&gt;&lt;/B&gt;, &lt;B&gt;&lt;I&gt;feldspar&lt;/I&gt;&lt;/B&gt;, &lt;B&gt;&lt;I&gt;feldspathoid&lt;/I&gt;&lt;/B&gt;, &lt;B&gt;&lt;I&gt;feldspathic earths&lt;/I&gt;&lt;/B&gt;, &lt;B&gt;&lt;I&gt;plagioclase&lt;/I&gt;&lt;/B&gt;,&lt;B&gt;&lt;I&gt; orthoclase, &lt;/I&gt;&lt;/B&gt;etc.&lt;/FONT&gt;&lt;BR&gt;
&lt;B&gt;feldspar groups &amp;amp; their occurrences&lt;BR&gt;
&lt;I&gt;sanidine&lt;/I&gt;&lt;/B&gt;: potassium-rich volcanic rocks and near-surface minor intrusions &amp;#151; &lt;I&gt;e.g., &lt;/I&gt;rhyolites and trachytes&lt;BR&gt;
&lt;B&gt;&lt;I&gt;orthoclase&lt;/I&gt;&lt;/B&gt;: potassium-rich dike rocks &amp;#151; &lt;I&gt;e.g., &lt;/I&gt;rhyolite and trachyte porphyries; granites, granodiorites, and syenites; arkose moderate-to high-grade metamorphic gneisses and schists&lt;BR&gt;
&lt;B&gt;&lt;I&gt;microcline&lt;/I&gt;&lt;/B&gt;: granitic pegmatites, hydrothermal veins granites, granodiorites, and syenites;arkose; low-to-moderate-grade metamorphic rocks&lt;BR&gt;

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

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