Roweite

Formula: Ca₂Mn₂B₄O₇(OH)₆

Origin of name: for G. Rowe, American collector

Crystal system: orthorhombic

Crystal class: 2/m 2/m 2/m

Twinning:

Unit cell: a = 9.057, b = 13.357, c = 8.289

Colour: Light brown

Diaphaneity: Transparent

Luster: Vitreous

Habit: Crystals lath-like, striated

Hardness: about 5

Specific gravity: 2.94

Cleavage: 3; {100} fair, {001} and {021} poor

Tenacity: Brittle

Streak: Light brown

Synonyms/varieties:

Comments: series with fedorovskite