Voglite

Formula: Ca₂Cu(UO₂)(CO₃)₄.6H₂O

Origin of name: for Josef Florian Vogl, Austrian mining official and mineralogist, who described the compound and published on uranium mines and minerals of Jachymov, Czech Republic.

Crystal system: Monoclinic

Crystal class: 2

Twinning:

Unit cell: a = 25.97, b = 24.5, c = 10.7, β = 104°

Colour: Emerald green to bright grass-green

Diaphaneity: Transparent to translucent

Luster: Vitreous, pearly on cleavage

Habit: Rhombic scales, tiny, striated, in aggregates and coatings

Hardness: 

Specific gravity: 3.06

Cleavage: 1; {010} perfect

Tenacity: 

Streak: Pale green

Synonyms/varieties:

Comments:  Fluorescent green under SW-UV