General Information:
Chemical Formula:Pb7(Fe,Cu)Al3GeSi12O36·(OH,H2O)6
Composition:(Molecular Weight = 2,678.79 gm)Aluminum 3.02 %
AlIron 1.56 %
FeSilicon 12.58 %
SiCopper 0.59 %
CuGermanium 2.71 %
GeHydrogen 0.30 %
H Lead 54.14 %
PbOxygen 25.09 %
O Empirical Formula: Pb7Fe2+0.75Cu0.25Al3GeSi12O36(OH)4·2(H2O)
Environment:Corroded Pb-Zn ores of the lower oxidation zone.
IMA Status:Approved IMA
Locality:TL: Tsumeb, Namibia.
Name Origin:Named to honor Mathew Rogers, fist European prospetor at Tsumeb, Namibia.
Physical Properties: Cleavage:[???] Perfect
Color:colorless, white, or light green yellow.
Density:4.7
Diaphaniety:Translucent
Hardness:2 - Gypsum
Luster:Vitreous - Pearly
Streak:white
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