Halurgite

Formula:  Mg2[B4O5(OH)4]2 . H2O

Origin of name:   For Institute of Halurgy, Russia

 

Crystal system:  Monoclinic

Crystal class:  2/m

Twinning:

Unit cell:

 

Colour:  White

Diaphaneity:

Luster:

Habit:  Crystals platy, microscopic; massive, fine-grained

Hardness:  2.5 to 3

Specific gravity:  2.19

Cleavage:  None

Tenacity:

Streak:

 

Synonyms/varieties:

 

Comments:

 

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