General Information:
Chemical Formula:Mg6Fe+++2(CO3)(OH)16·4(H2O)
Composition:(Molecular Weight = 661.71 gm)Magnesium 22.04 %
MgIron 16.88 %
FeHydrogen 3.66 %
H Carbon 1.82 %
C Oxygen 55.61 %
O Empirical Formula: Mg6Fe3+2CO3(OH)16·4(H2O)
Locality:Langbanshyttan, Sweden.
Name Origin:From the Greek, pyro and the Latin aurium, "fire" and "golden" because of the gold-like submetallic scales present in its type locality.
Physical Properties: Cleavage:[0001] Perfect
Color:brownish yellow, brown white, colorless, greenish, or yellowish white.
Density:2.07
Diaphaniety:Transparent
Habits:Tabular - Form dimensions are thin in one direction., Fibrous - Crystals made up of fibers.,
Hardness:2.5 - Finger Nail
Luster:Pearly
Streak:white
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