Löweite

Formula:  Na12Mg7(SO4)13 . 15H2O

Origin of name:  For Alexander Löwe, Austrian assayer

 

Crystal system:  Hexagonal

Crystal class:  -3

Twinning: 

Unit cell: 

 

Colour:  Colourless, grey, pale yellow, reddish yellow from iron oxide inclusions

Diaphaneity:  Transparent

Luster:  Vitreous

Habit:  Massive; embedded anhedral grains

Hardness:  2.5 to 3

Specific gravity:  2.37

Cleavage: 

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