Chemistry:Tancaite-(Ce)

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Tancaite-(Ce)
General
CategoryMolybdate mineral
Formula
(repeating unit)
FeCe(MoO4)3•3H2O
Strunz classification7.GB.50
Crystal systemTrigonal
Crystal classRhombohedral (3)
H-M symbol: (3)
Space groupR3
Unit cella = 19.290, c = 47.251 [Å]
Identification
References[1]

Tancaite-(Ce) is a very rare molybdate mineral[1] with the formula FeCe(MoO4)3•3H2O. It was found in Punta de Su Seinargiu locality on Sardinia, Italy.[3][4] Red crystals of tancaite-(Ce) resemble modified cubes, but the mineral is trigonal (space group R-3).[1] The type locality of tancaite-(Ce) is also a place of discovery of other molybdate minerals, including thorium molybdates ichnusaite and nuragheite.[5]

References