Botryogen

Formula:  MgFe(SO4)2(OH) . 7H2O

Origin of name:  From Greek for bunch or grapes, and to bear

 

Crystal system:  Monoclinic

Crystal class:  2/m

Twinning:

Unit cell:

 

Colour:  Red to orange

Diaphaneity:  Transparent to translucent

Luster:  Vitreous

Habit:  Crystals short to long prismatic; botryoidal or reniform masses

Hardness:  2 to 2.5

Specific gravity:  2.14

Cleavage:  2; {010} perfect, {110} good

Tenacity:

Streak:  Pale yellowish

 

Synonyms/varieties:

 

Comments:

 

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