Uramphite

Formula: (NH₄)(UO₂)(PO₄).3H₂O

Origin of name: from composition (uranyl, ammonium, phosphate)

Crystal system: Tetragonal (synthetic)

Crystal class: 4/m 2/m 2/m

Twinning:

Unit cell: a = 7.01, c = 9.05

Colour: Bottle-green to pale green

Diaphaneity: Transparent to translucent

Luster: Vitreous

Habit: square tablet, to 0.2 mm, small rosettes, lichen-like

Hardness:  2-2.5

Specific gravity: 3.7

Cleavage: 2; distinct

Tenacity: 

Streak: Greenish white

Synonyms/varieties:

Comments: fluoresces medium yellow-green , radioactive