Wulfenite

Formula: PbMoO4

Origin of name: for F. Wülfen, Austrian mineralogist

 

Crystal system: tetragonal

Crystal class: 4/m

Twinning: common about [001] axis

Unit cell: a = 5.435 Å, c = 12.11 Å

 

Colour: yellow to orange, orange-brown to brown, yellowish gray

Diaphaneity: 

Luster: resinous to adamantine

Habit: crystals square tabular, often thin, or octahedral, prismatic or cuboidal, massive, coarse to fine granular

Hardness: 2.75 to 3

Specific gravity: 6.5 to 7.0

Cleavage: 3; {011} distinct, {001} and {013} indistinct

Tenacity: subconchoidal to uneven, brittle

Streak: white

 

Synonyms/varieties:

 

Comments: 

 

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