M.J. Hibbard

Apophyllite

Apophyllite   KCa₄(Si₄O₁₀)₂F8H₂O    Tetragonal
o Hydrothermal in cavities of basalt. (chapter 12).
- Cluster of crystals (longest about 1.5 cm) with well-developed tetragonal prism terminated by the dipyramid {011}. Poona, India. Sample provided by H. Gordon.

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