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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