Antimony

Formula:  Sb

Origin of name:  From Greek antimos = against solitude

 

Crystal system:  Hexagonal

Crystal class:  -3 2/m

Twinning:  Common on {10-14}, polysynthetic or cyclic (fourlings, sixlings)

Unit cell:   a = 4.307 Å, c = 11.27 Å

 

Colour:  Tin-white

Diaphaneity: Opaque

Luster:  Metallic

Habit:  Crystals pseudo-cubic or thick tabular; massive, lamellar, radiated

Hardness:  3 to 3.5

Specific gravity:  6.69

Cleavage:  4; {0001} perfect, {10-11} distinct, {10-14} imperfect, {10-20} indistinct

Tenacity:  Brittle

Streak:  Grey

 

Synonyms/varieties:

 

Comments: In hydrothermal veins

 

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