Larsenite

Formula:  PbZnSiO4

Origin of name:  For E. Larsen Jr., American petrologist

 

Crystal system:  Orthorhombic

Crystal class:  mm2

Twinning: 

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Colour:  White

Diaphaneity:  Transparent

Luster:  Adamantine

Habit:  Crystals slender prismatic, vertically striated, or tabular

Hardness:  3

Specific gravity:  2.90 to 5.90

Cleavage:  1; {120} distinct

Tenacity: 

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