Hexahydrite

Formula:  MgSO4 . 6H2O

Origin of name:   From composition

 

Crystal system:  Monoclinic

Crystal class:  2/m

Twinning: 

Unit cell: 

 

Colour:  Colourless, white, pale greenish 

Diaphaneity:  Opaque, or transparent

Luster:  Vitreous to pearly

Habit:  Crystals thick tabular; coarse columnar to fibrous

Hardness

Specific gravity:  1.76

Cleavage:  1; {100} perfect

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments:   Soluble in water

 

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