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Billietite
Billietite
is an
uncommon
mineral
of
Uranium
that
contains
Barium
. It has the
chemical
formula:
Ba
6
O
4
6
•8H
2
O. It usually occurs as
clear
yellow
orthorhombic
crystals
.
Billietite is named after
Valere Louis Billiet
,
Belgian
crystallographer
at the
University of Ghent
,
Ghent, Belgium
.