Lévyne-Na

levyne-Na

levyne-Ca

levyne

zeolite

Images

Formula: Na₆(Si₁₂Al₆)O₃₆.18H₂O
Tectosilicate (framework silicate), chabazite-lévyne subgroup, zeolite group
Crystal System: Trigonal
Specific gravity: 2.09 to 2.16
Hardness: 4 to 4½
Streak: White
Colour: White, greyish white, reddish white, yellowish white, Grey
Environments:

Basaltic cavities

Lévyne-Na mostly comes from the seashore, where cation exchange with seawater probably occurred (Dana)

The type locality is Chojabaru, Iki Islands, Iki City, Nagasaki Prefecture, Japan.

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