Canavesite

Formula:  Mg₂(CO₃)(HBO₃) ^. 5H₂O

Origin of name:  After locality; Brosso, Canavese District, Italy

Crystal system:  Monoclinic

Crystal class:  2/m

Twinning:

Unit cell: a = 23.49 Ǻ, b = 6.16 Ǻ, c = 21.91 Ǻ, β = 90.5°

Colour:  Milky white

Diaphaneity:

Luster:  Vitreous

Habit:  Rosette-like aggregates of fibres

Hardness:

Specific gravity:  1.80

Cleavage:  1; One or more observed, or partings

Tenacity: 

Streak:

Synonyms/varieties:

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