Formula: K6-7(Mg,Mn,Fe,Zn)48(Si,Al)72(O,OH)216 . 16H2O
Origin of name: For the Lenni Lenape Indians who inhabited the Franklin NJ area
Crystal system: Triclinic
Crystal class: Unknown
Twinning:
Unit cell:
Colour: Dark brown, light green
Diaphaneity:
Luster: Vitreous
Habit: Crystals platy and bladed, in clusters and druses
Hardness: ~ 3
Specific gravity: 2.72
Cleavage: 2; {001} perfect, nearly perpendicular to {001} imperfect
Tenacity:
Streak: Brown
Synonyms/varieties:
Comments:
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