Senarmontite

Formula: Sb2O3

Origin of name: for H. de Senarmont, French mineralogist

 

Crystal system: cubic

Crystal class: 4/m -3 2/m

Twinning:

Unit cell: a = 11.15 Å

 

Colour: colourless to grayish white

Diaphaneity: 

Luster: resinous

Habit: crystals octahedral, to 3 cm, massive, granular, crusts

Hardness: 2 to 2.5

Specific gravity: 5.50

Cleavage: 1; {111} trace

Tenacity: uneven, brittle

Streak: white

 

Synonyms/varieties:

 

Comments: dimorphous with valentinite

 

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