 | Beurlen, Hartmut, Da Silva, Marcelo R. R., Thomas, Rainer, Soares, Dwight R., Olivier, Patrick (2008) Nb–Ta–(Ti–Sn) oxide mineral chemistry as tracer of rare-element granitic pegmatite fractionation in the Borborema Province, Northeastern Brazil. Mineralium Deposita, 43 (2) 207-228 doi:10.1007/s00126-007-0152-4 | Journal (article/letter/editorial) | | fractionation in the Borborema Province, Northeastern Brazil Hartmut Beurlen & Marcelo R. R. Da Silva & Rainer...Borborema Pegmatitic Province (BPP), northeastern Brazil, is historically important for tantalum mining...the production of gem quality, turquoise blue, ‘Paraíba Elbaite.’ With more than 750 registered mineralized...to the beryl–columbite phosphate subtype. Electron microprobe analyses (EMPA) of columbite, tapiolite,...n., Cidade Universitária, 50740-530 Recife, PE, Brazil e-mail: beurlen@terra.com.br M. R. R. Da Silva |  | | Book | | BARTORELLI ::• . . .. MINERALS & PRECIOUS STONES OF BRAZIL Sponsored by: VALE MINISTER.IO DA CULTURA ©...Brasileira do Livro, SP, Brazil) Cornejo, Carlos .Minerals & precious stones of Brazil. Carlos Cornejo, Andrea...3. Minerals - Brazil 4. Minerals- Classification 5. Mineralogy 6. Mineralogy - Brazil - History 7. Precious...Precious stones - Brazil I. Bartorelli, Andrea. II. Title. 09-10025 Cover photograph: Crystal of brazilianite...Landmann. CDD-549 Indexes for systematic catalog: 1. Brazil: Minerals and precious stones: Mineralogy and gemology |  | | Book | | celebrated Golconda mines being in the Madras area; in Brazil, from Diamantina, Minas Gerais; from South Africa...United States, particularly Colorado, and Mexico. Iron Fe Native iron is rare. It is found either as a terrestrial...meteoritic iron and is the cubic alphaphase of the Fe—Ni system with up to 6% Ni. Metakamacite is an unstable...gamma-phase, with up¬ wards of 33% Fe. The terrestrial form, awaruite, is Ni, Fe, with 60% or more Ni. Iron is...meteorites: osbornite TiN cohenite Fe3C schreibersite (Fe, l\li)3P only in Sulphides, Selenides, Tellurides |  | | Book | | Cr Co Cu Dy Er Eu F Gd Ga Ge Au Hf He Ho H In 1 Ir Fe Kr La Pb Li Lu Mg Mn Hg Mo atomic number 13 51 18...the same contents as those of the Se As Br Ca Na Pb Fe Sb 1 Te Sr K Mn Ti inert gases. From this has evolved...principle governing our understanding of how Zr V Fe Cs (NO. ) (S03) (P03) (Se03) (As03) Co Cu W elements...form ions with several valencies. For example, iron (Fe) may occur as divalent Fe2+ or trivalent Fe3 + ,...carbon. In graphite the carbon atoms are linked Mg and Fe. You can think of this as the forsterite into sheets | | | Book | | ctid op fragmenta night fin aq ca.mifla fuerit.2 fe qs it aqilla la’ uerit incurrit mcbrog excoriat6c3...occurrence of | Chromium ae understood, the‘ more Fe clearly isotopes were i . symbol 8 é Cy 8 ae...ue 77Sena zo Mo Nitrogen Osmium Osvaen a) Ir Fe Ke |wergne 144.24 a 4 a i timber 60 aia 132...Vv Xe 2 Zn Zr 158.92 eB) ee 20hay 22 a2 64 fe = 40 47.90 131.30 vee : a 91.22 THE Right:...er Be Mg Fe Mn Pb Ti Ti v Mn ee Ww PE ee T+ E cl H Li Br | Na K Ca Sr Ba Fe Rb Cs Ni |
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