Formula: Zn3(CO3,SO4)(OH)4
Origin of name: For Brian Young, collector of the type specimen
Crystal system: Orthorhombic
Crystal class: Unknown
Twinning:
Unit cell:
Colour: White
Diaphaneity: Transparent
Luster: Vitreous
Habit: Thin blades 1-2 µm taper to sharp point, in aggregates and rosettes
Hardness:
Specific gravity: 3.93 to 4.09
Cleavage: 2; {100} perfect, {001} possible
Tenacity:
Streak:
Synonyms/varieties:
Comments: May be monoclinic; readily soluble with effervescence in dilute acids
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