Tancaite-(Ce) Explained

Tancaite-(Ce)
Category:	Molybdate mineral
Formula:	FeCe(MoO4)3•3H2O
Imasymbol:	Tca-Ce^[1]
Strunz:	7.GB.50
System:	Trigonal
Class:	Rhombohedral H-M symbol:
Symmetry:	R
Unit Cell:	a = 19.290, c = 47.251 [Å]
References:	^[2]

Tancaite-(Ce) is a very rare molybdate mineral 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). The type locality of tancaite-(Ce) is also a place of discovery of other molybdate minerals, including thorium molybdates ichnusaite and nuragheite.^[5]

Notes and References

1. Warr. L.N.. 2021. IMA–CNMNC approved mineral symbols. Mineralogical Magazine. 85. 3. 291–320. 10.1180/mgm.2021.43. 2021MinM...85..291W. 235729616. free.
2. http://www.mindat.org/min-40045.html Mindat
3. Orlandi, P., and Bonaccorsi, E., 2010. Tancaite-(Ce), IMA 2009-097. CNMNC Newsletter, April 2010, 376; Mineralogical Magazine 74, 375-377
4. Web site: Tancaite-(Ce) - Mindat.org . Mindat.org . 2016-03-06.
5. Web site: Punta de Su Seinargiu (Su Seinargiu; Su Senargiu), Sarroch, Cagliari Province, Sardinia, Italy - Mindat.org . Mindat.org . 2016-03-06.