Chaidamuite

Formula:  (Zn,Fe)Fe(SO4)2(OH) . 4H2O

Origin of name:  From locality; Chaidamu, China

 

Crystal system:  Triclinic, pseudo-monoclinic

Crystal class:  1

Twinning:

Unit cell:

 

Colour:  Brown to yellow-brown

Diaphaneity:  Translucent

Luster:  Vitreous

Habit:  Disseminated fine grains and tiny crystals <1 mm in granular aggregates

Hardness:  2.5 to 3

Specific gravity:  2.722

Cleavage:  2; {001}, {10-1} perfect

Tenacity:

Streak:  Pale yellow

 

Synonyms/varieties:

 

Comments:

 

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