Phillipsite (English spelling)

Japanese: フィリップサイト（英語表記）phillipsite

A type of mineral. Its chemical composition is KCa[Al ₃ Si ₅ O ₁₆ ]･6H ₂ O. It is also called phillipsite. It occurs in basalt cavities and salt lake sediments, but is more abundant as an authigenic mineral in pelagic sediments with slow deposition rates and deeper than the carbonate compensation depth, especially in brown clays, along with Mn micronodules. Deep-sea phillipsite is an elongated columnar crystal (monoclinic system) 8 μm to 5 mm long (mostly 10 to 20 μm), but it also occurs in complex twins and as spherical aggregates of many columnar crystals.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

鉱物の一種。化学組成はKCa[Al₃Si₅O₁₆]･6H₂O。灰十字沸石ともいう。玄武岩の空洞や塩水湖の堆積物中にも産するが，堆積速度の遅い，また炭酸塩補償深度以深の遠洋堆積物，とくに褐色粘土中に自生鉱物としてMn微小団塊とともに多産する。深海フィリップサイトは長さ8μm～5mm(大部分は10～20μm)の伸びた柱状結晶(単斜晶系)であるが，複雑な双晶体や多数の柱状結晶の球状集合体としても多産する。

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