Sweetite

Formula: Zn(OH)2

Origin of name: for Jessie Sweet, British mineral curator

 

Crystal system: tetragonal

Crystal class: 422

Twinning: 

Unit cell: 

 

Colour: colourless, whitish

Diaphaneity: 

Luster: 

Habit: crystals bipyramidal, to 1 mm

Hardness

Specific gravity: 3.33

Cleavage: none

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments: trimorphous with ashoverite and wülfingite, soluble with slight effervescence in dilute HCl

 

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