Formula: Ca2FeCl[B9O13(OH)6].4H2O
Origin of name: after locality Penobsquis, New Brunswick, Canada
Crystal system: monoclinic
Crystal class: 2
Twinning:
Unit cell:
Colour: pale yellow
Diaphaneity: transparent to translucent
Luster: vitreous
Habit: euhedral triangular crystals to 1.5 mm wide
Hardness: 3
Specific gravity: 2.26
Cleavage: none
Tenacity:
Streak: white
Synonyms/varieties:
Comments:
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