Urea

Formula: CO(NH2)2

Origin of name: from occurrence in urine

 

Crystal system: Tetragonal

Crystal class: 4 2m

Twinning:

Unit cell: a = 5.646, c = 4.701

 

Colour: Pale yellow to pale brown, colourless

Diaphaneity: Translucent

Luster: 

Habit: crystals prismatic, elongated, to 3 mm, massive groupings, crusts, stalagmites

Hardness

Specific gravity: 1.33

Cleavage: none

Tenacity: 

Streak: Yellow white

 

Synonyms/varieties:

 

Comments:  Soluble in water

 

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