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Menezesite
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| Menezesite.4491 Formula: Nb9.22 Ta.36 Ti3.25 Zr2.74 Th.55 Fe.23 Mn.23 Mg.935 Ba2.21 Ca.31 K.53 O54 H48 Name: Menezesite Unit cell: 13.017 13.017 13.017 90.0 90.0 90.0 , V=2205.63 Space group: Im3 (204) |
Atencio D , Coutinho J M V , Doriguetto A C , Mascarenhas Y P , Ellena J , Ferrari V C , American Mineralogist , 93 (2008) p.81-87, Menezesite, the first natural heteropolyniobate, from Cajati, Sao Paulo, Brazil:, description and crystal structure, Locality: Jacupiranga mine, Cajati county, Sao Paulo, Brazil
