Szomolnokite

Formula: FeSO4.H2O

Origin of name: after locality Szomolnok, Slovakia

 

Crystal system: monoclinic

Crystal class: 2/m

Twinning: 

Unit cell: 

 

Colour: colourless, yellow, yellowish to reddish brown, bluish

Diaphaneity: transparent to translucent

Luster: vitreous

Habit: crystals bipyramidal, often distorted, globular, stalactitic

Hardness: 2.5

Specific gravity: 3.03 to 3.07

Cleavage: none

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments: 

 

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