Zincsilite

Formula: Zn₃Si₄O₁₀(OH)₂.4H₂O

Origin of name: From composition, zinc plus silicon

Crystal system: Monoclinic

Crystal class: Unknown

Twinning:

Unit cell: a = 5.1, b = 9.17, c = 15.3, β = 90°

Colour: White to bluish white, greenish white

Diaphaneity: Translucent to opaque

Luster: Pearly on cleavage

Habit: Lamellae and foliae to 2 mm, earthy, dull

Hardness: 1.5 to 2

Specific gravity: 2.61 to 2.71

Cleavage: 1; {001} perfect

Tenacity:

Streak: White

Synonyms/varieties:

Comments: