oligoclase
A plagioclase feldspar, the second member of the Albite-Anorthite solid solution seriesA plagioclase feldspar, the second member of the Albite-Anorthite solid solution series. Primarily found as small crystals in impure marble. Oligoclase contains a small amount of calcium substituting for some of the sodium in its formula. Oligoclase with reddish-golden inclusions found in Norway and Canada is called sunstone.
Meaning
1 senses(uncountable, usually)A plagioclase feldspar, the second member of the Albite-Anorthite solid solution series. Primarily found as small crystals in impure marble. Oligoclase contains a small amount of calcium substituting for some of the sodium in its formula. Oligoclase with reddish-golden inclusions found in Norway and Canada is called sunstone.
- any of a series of triclinic feldspars that form rocks
Origin
From oligo- + -clase.From oligo- + -clase.
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Forms
plural: oligoclases| Singular | oligoclase |
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uncountable
Synonyms
1 synonyms- any of a series of triclinic feldspars that form rocks:plagioclase
Word family
3 related wordsLessons for this word
1 lessons- A1Countable and uncountable nouns — Because it can be uncountable