Larderellite

Formula:  NH4B5O7(OH)2 . H2O

Origin of name:  For Francesco de Larderello, Italian industrialist

 

Crystal system:  Monclinic

Crystal class:  2/m

Twinning: 

Unit cell: 

 

Colour:  White; yellowish from impurities

Diaphaneity: 

Luster: 

Habit:  Microscopic rhombic tablets

Hardness:

Specific gravity:  1.91

Cleavage:  1; {100} perfect

Tenacity: 

Streak: 

 

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