Juangodoyite

Formula: Na₂Cu(CO₃)₂

Origin of name: Named after Juan Godoy, discoverer of the Chañarcillo silver mine

Crystal system: Monoclinic

Crystal class: 2/m

Twinning: 

Unit cell: a = 6.171, b = 8.171, c = 5.645, β = 116.23°

Colour: Vivid ultramarine blue

Diaphaneity: 

Luster: Earthy, dull

Habit: Fine-grained pseudomorphs, with crystallites up to 5 μm in size, after small laths of chalconatronite (Na₂Cu(CO₃)₂ · 3H₂O).

Hardness: 1-2

Specific gravity: 2.98

Cleavage: None

Tenacity: 

Streak: Blue

Synonyms/varieties:

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