catapleiite

\\ˌkad.əˈplīˌīt\ noun (-s)

Etymology: German katapleiit, from Greek kata in the region of, down + pleiōn more + -it -ite; from its occurence together with other rare minerals — more at cata-, pleonasm

: a rare mineral (Na₂,Ca)ZrSi₃O₉.2H₂O consisting of hydrous silicate of sodium, calcium, and zirconium occurring in thin tabular yellow or yellowish brown crystals (hardness 6, specific gravity 2.8)

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catapleiite Min.

(kætəˈpliːaɪt)

[Named 1850, f. Gr. κατά together with + πλεῖον more + -ite, because it occurs along with several other minerals.]

A hydrous silicate of zirconium and sodium; a hexagonal opaque mineral of light yellowish-brown colour.

Dana Min. (1868) 401.