Bigwoodite
A rock subtype
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A variety of alkali feldspar syenite consisting essentially of orthoclase, microcline and albite with traces of foids and sodic pyroxene and/or amphibole.
Unique Identifiers
Mindat ID:
51022
Long-form identifier:
mindat:1:1:51022:0
GUID
(UUID V4):
(UUID V4):
66019628-c31d-4b8f-9a61-83f244365b7b
Classification of Bigwoodite
Alkali-felddspar-syenite is in section 6 of the QAPF diagram.
Mineralogy of Bigwoodite
Essential minerals - these are minerals that are required within the classification of this rock:
Feldspar > Alkali Feldspar > Albite | Na(AlSi3O8) |
Feldspar > Alkali Feldspar > Microcline | K(AlSi3O8) |
Feldspar > Alkali Feldspar > Orthoclase | K(AlSi3O8) |
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
Alkali pyroxene | A petrological name for the sodium-rich pyroxenes aegirine and aegirine-augite. |
Amphibole | (Na, K, â—»)(Ca,Na)2(Mg,Fe,Al)5((Si,Al)8O22)(OH,F,Cl,O)2 |
Feldspathoid | A family of rock-forming minerals consisting of aluminosilicates of sodium, potassium, or calcium and having too ... |
Internet Links for Bigwoodite
mindat.org URL:
https://www.mindat.org/min-51022.html
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