Formicaite

FormulaCa(HCO2)2

Origin of name: Named after its composition, clcium formate

 

Crystal system: Tetragonal

Crystal class: 422

Twinning: 

Unit cell: a = 6.77, c = 9.463

 

Colour: White, light blue

Diaphaneity: Transparent

Luster: Vitreous

Habit: Microscopic, tabular, aggregates

Hardness: 1

Specific gravity: 1.9

Cleavage: [100] perfect

Tenacity: Brittle

Streak: White

 

Synonyms/varieties: Calcium Formate

 

Comments: 

 

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