Zincalstibite

Formula: Zn₂AlSb(OH)₁₂

Origin of name: Commission on New Minerals and Mineral Names (CNMMN), after the chemical composition (Zn, Al, Sb)

Crystal system: Trigonal

Crystal class: 32

Twinning: 

Unit cell: a =5.327, c = 9.792

Colour: Colourless to milky white

Diaphaneity: Transparent

Luster: Vitreous

Habit: submillimetric prismatic crystals

Hardness: 

Specific gravity: 

Cleavage: 

Tenacity: 

Streak: 

Synonyms/varieties:

Comments: Found in a small cavity of a marble as the result of hydrothermal alteration of sulfides.