A sodium-rich triclinic plagioclase feldspar containing more calcium than albite, common in siliceous igneous rocks.
| 单词 | θ7036 |
| 释义 | the world > the earth > minerals > types of mineral > silicates > tectosilicate > [noun] > feldspar > plagioclase > oligoclase (1) oligoclase1832 A sodium-rich triclinic plagioclase feldspar containing more calcium than albite, common in siliceous igneous rocks. |
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