Palmierite

Formula: (K,Na)2Pb(SO4)2

Origin of name: for L. Palmieri, Italian physicist

 

Crystal system: hexagonal

Crystal class: -3 2/m

Twinning:

Unit cell: 

 

Colour: colourless, white

Diaphaneity: 

Luster: vitreous, pearly on {0001}

Habit: hexagonal micaceous plates, microscopic

Hardness

Specific gravity: 4.195 to 4.33

Cleavage: none

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments: 

 

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