Galery 1, potassium alum 3
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© 1998 by Udo J.A. Behner
Potassium Alum
colored with rhodamine B
chemical formula
: KAl(SO
4
)
2
· 12 H
2
O
crystal class
: cubic disdodekaedric
growing method
: slowly cooling of the aquaous solution
growing time
: about 72 hours
crystal size
: app. 4 to 5 centimeters
This pretty in pink also shows a medium strong orange fluorescence under long wave ultraviolet light. The "pink" alum is a quite popular sales item
This specimen is currently exhibited at the mineral museum in Pforzheim.
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