Erythrosiderite

Formula:   K2FeCl5 . H2O

Origin of name:   From Greek for red and iron

 

Crystal system:   Orthorhombic

Crystal class:   2/m 2/m 2/m

Twinning:

Unit cell: 

 

Colour:  Red to brownish red

Diaphaneity:

Luster:   Vitreous

Habit:   Crystals tabular, flattened

Hardness:

Specific gravity:   2.37

Cleavage:   2; {210} and {011} perfect

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments:   Deliquescent

 

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