Minium

Formula:  Pb2PbO4

Origin of name:  From Iberian for cinnabar

 

Crystal system:  Tetragonal

Crystal class:  4/m 2/m 2/m

Twinning: 

Unit cell: 

 

Colour:  Scarlet red to brownish red

Diaphaneity:  Opaque

Luster:  Dull to somewhat greasy

Habit:  Massive, earthy or powdery

Hardness:  2.5

Specific gravity:  8.9 to 9.2

Cleavage:  1; {110} perfect

Tenacity: 

Streak:  Orange-yellow

 

Synonyms/varieties:

 

Comments: 

 

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