Molybdomenite

Formula:  PbSeO3

Origin of name:  From Greek for lead and moon

 

Crystal system:  Monoclinic

Crystal class:  2/m

Twinning: 

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Colour:  Colourless to yellow-white

Diaphaneity: 

Luster:  Pearly to greasy

Habit:  Thin scales

Hardness:  3.5

Specific gravity:  7.07

Cleavage:  2; one perfect, one distinct perpendicular to other

Tenacity: 

Streak: 

 

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