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Tapiolite-(Fe): (Fe++,Mn++)(Ta,Nb)2O6 Tapiolite: (Fe,Mn)(Ta,Nb)2O6
Comments: Twinned, brown, dipyramid crystal of ferrotapiolite.
Location: Sapucaia district, Galileia, Minas Gerais, Brazil.
Scale: 4.2x3.1x3.1 cm.
© Richard Dale / Dale Minerals
Comments: Ferrotapiolite crystal in white quartz and mica matrix.
Location: Quixabá Mine, Frei Martinho, Paraíba Brazil.
Scale: Crystal size 1 x 0.8 cm.
© Fabre Minerals