Kremersite

Formula:  (NH4,K)2FeCl5 . H2O

Origin of name:  For P. Kremers, German chemist

 

Crystal system:  Orthorhombic

Crystal class:  2/m 2/m 2/m

Twinning: 

Unit cell: 

 

Colour:  Red to brownish red

Diaphaneity: 

Luster:  Vitreous

Habit:  Crystals pseudo-octahedral

Hardness

Specific gravity:  2.17

Cleavage:  2; {210} and {011} perfect

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments:  Deliquescent

 

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