Formula: Na6Mg[B6O7(OH)6]4.10H2O
Origin of name: for B. Rivadavia, President of Argentina
Crystal system: monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: colourless
Diaphaneity: transparent
Luster: vitreous
Habit: crystals prismatic, elongated along b-axis, to 3 cm, nodular masses
Hardness: 3.5
Specific gravity: 1.91
Cleavage: 3; {100} and {-101} excellent, {010} poor
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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