Noun
A
very
rare
uranium
mineral
,
Ca
(
UO
<
sub
>
2
sub
>)<
sub
>
2
sub
>
V
<
sub
>
2
sub
>
O
<
sub
>
8
sub
>ยท(
5-8
)
H
<
sub
>
2
sub
>
O
.