General Information:
Chemical Formula:
K6-7(Mg,Mn,Fe++,Fe+++,Zn)48(Si,Al)72(O,OH)216·16(H2O)
IMA Status:
Approved IMA 1982
Locality:
Franklin, Sussex County, New Jersey, USA.
Name Origin:
Named for the Lenni Lenape Native American tribe, who first inhabited the type locality region.
Physical Properties:
Cleavage:
[001] Perfect, [1] Indistinct
Color:
brownish black, green, light green, or dark brown.
Density:
2.72
Diaphaniety:
Translucent to opaque
Hardness:
3 - Calcite
Luster:
Vitreous - Resinous
Streak:
brown
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