| 单词 | apophyllite |
| 释义 | Word Frequency apophyllite(əˈpɒfɪˌlaɪt, ˌæpəˈfɪlaɪt) noun a white, colourless, pink, or green mineral consisting of a hydrated silicate of calcium, potassium, and fluorine in tetragonal crystalline form. It occurs in cracks in volcanic rocks. Formula: KCa4(Si4O10)2(OH1F).8H2O Word origin C19: from French, from apo- + Greek phullon leaf + -ite1; referring to its tendency to exfoliate |
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