Hexahydroborite

Formula:  Ca[B(OH)4]2 . 2H2O

Origin of name:  From composition

 

Crystal system:  Monoclinic

Crystal class:  2/m

Twinning: 

Unit cell: 

 

Colour:  Colourless

Diaphaneity: 

Luster:  Vitreous

Habit:  Crystals flattened prismatic, microscopic

Hardness:  2.5

Specific gravity:  1.87

Cleavage:  2; One perfect, one imperfect

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments: 

 

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