Zinc-melanterite

Formula: (Zn,Cu,Fe)SO4 .7H2O

Origin of name: from zinc and melanterite

 

Crystal system: Monoclinic

Crystal class: 2/m

Twinning:

Unit cell: a = 14.05, b = 6.51, c = 11.03, β = 105.51°

 

Colour: Pale greenish blue, green, yellowish green, apple green

Diaphaneity: Transparent to translucent

Luster: Vitreous, resinous

Habit: Massive, columnar

Hardness: ~2

Specific gravity: 2.02

Cleavage: None

Tenacity:

Streak:

 

Synonyms/varieties:

 

Comments:

 

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