单词 | apophyllite |
释义 | apophyllite [ǝ`päf·ǝ´līt] MINERALOGY A hydrous calcium potassium silicate containing fluorine and occurring as a secondary mineral with zeolites with geodes and other igneous rocks; the composition is variable but approximates KFCa4(Si2O5)4·8H2O. Also known as fish-eye stone. |
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