Definition of apophyllite in English:

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Pronunciation: /əˈpäfəˌlīt/ Pronunciation: /ˌapəˈfilīt/


A mineral occurring typically as white glassy prisms, usually as a secondary mineral in volcanic rocks. It is a hydrated silicate and fluoride of calcium and potassium.
Example sentences
  • Most of the cavities are filled or lined with crystalline formations of various zeolites, such as stilbite, scolecite, and heulandite, plus calcite and apophyllite; these minerals typically occur in combination with each other.
  • True, but names such as apatite, apophyllite, chlorite, serpentine, and tantalite are very common names that appear frequently in the world of a beginning collector, so their absence from references can only lead to frustration.
  • How about apatite, apophyllite, axinite, chlorite, hypersthene, scapolite, serpentine, tantalite, and wolframite?


Early 19th century: from apo- + Greek phullon 'leaf' + -ite1.

For editors and proofreaders

Syllabification: a·poph·yl·lite

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