General Information:
Chemical Formula:K(Fe++,Mg,Mn)13[AlSi17O42](OH)14
Composition:(Molecular Weight = 2,147.17 gm)Potassium 1.82 %
K Magnesium 1.13 %
MgManganese 2.56 %
MnAluminum 1.26 %
AlIron 28.61 %
FeSilicon 22.24 %
SiHydrogen 0.66 %
H Oxygen 41.73 %
O Empirical Formula: KFe2+11MgMn2+AlSi17O42(OH)14
Environment:Blue schist facies metamorphic rocks.
IMA Status:Approved IMA 1966
Locality:Laytonville quarry, 5 miles south of Laytonville, Mendocino Co., California.
Name Origin:Named for Jack Zussman (1924-), crystallographer and emeritus professor of geology, Manchester University, England.
Physical Properties: Cleavage:[0001] Perfect
Color:light green.
Density:3.146
Diaphaniety:Translucent
Luster:Vitreous (Glassy)
Streak:white
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