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Coutinhoite
Type Locality
Urucum mine (Tim mine; Córrego do Urucum pegmatite), Galiléia, Doce valley, Minas Gerais, Brazil
Mineral Data
Th
x
Ba
(1-2x)
(UO
2
)
2
Si
5
O
13
·(H
2
O)
1+y
(0 < x < 0.5 and 0 < y < (2+x))
Strunz:
9.AK.30
Physical Properties
Colour:
yellow
Streak:
yellow
Hardness:
2.0 - 0.0
Tenacity:
brittle
