Tocornalite

Formula: silver mercury iodide

Origin of name: for S. Tocornal, Chilean university rector

 

Crystal system: unknown

Crystal class: unknown

Twinning:

Unit cell: 

 

Colour: pale yellow to bright yellow, on exposure to light rapidly darkens and becomes black

Diaphaneity: 

Luster: 

Habit: massive, granular

Hardness: 1

Specific gravity

Cleavage: none

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments: 

 

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