 | | Report (issue) | | Mn2+Ta2O6 Tantalite-(Mn) Crystal Data: Orthorhombic. Point Group: 2/m 2/m 2/m. [Crystals short prismatic...subparallel crystals; massive] (by analogy to columbite-(Fe)). Twinning: [On {021} and {023}, may produce...Series: Dimorphous with tapiolite-(Mn); forms series, with columbite-(Mn), and with tantalite-(Fe) and tantalite-(Mg)...tantalite-(Mg). Mineral Group: Columbite group. Occurrence: An accessory and primary constituent of granite...Parelhas, Rio Grande do Norte. At Stak Nala, Gilgit district, Pakistan. From Wodgina, Greenbushes, and |  | Novák, Milan, Cempírek, Jan, Gadas, Petr, Škoda, Radek, Vašinová Galiová, Michaela, Pezzotta, Federico, Groat, Lee A. (2015) Boralsilite and Li, Be-bearing "Boron Mullite" Al8B2Si2O19, Breakdown products of spodumene from the Manjaka pegmatite, Sahatany valley, Madagascar. The Canadian Mineralogist, 53 (2) 357-374 doi:10.3749/canmin.1400092 | Journal (article/letter/editorial) | | accessory minerals include Ca,Mn-rich garnet, beryl (frequently Cs-rich), columbite-tantalite, pollucite, rhodizite-londonite...Schematic map of the Sahatany Valley pegmatite district. The grey stars represent the main pegmatite dikes... wollastonite (Ca), almandine (Fe), spessartine (Mn), fluorapatite (P), titanite (Ti), chromite (Cr)...of fluorapatite, lens-shaped crystals of black columbite-tantalite, and anhedral grains of pink lithiophilite...2006) with only trace amounts of Na (0.01–0.02 apfu), Mn (≤0.01 apfu), Fe3+tot (≤0.02 apfu), B (ca. 20–170 |  | | Journal (article/letter/editorial) | | mined for tourmaline and beryl as gemstones and columbite-tantalite and microlite concentrates. It contains...minerals helped to define the primary zones, as the Mn/Fe ratio increases with fractional crystallization...schorl, elbaite,‘fluor-elbaite’, green beryl, columbite (Mn) Pockets in the inner intermediate zone quartz...of albite, muscovite elbaite, ‘fluor-elbaite’, columbite, rutile, Ce-bastnäsite Core zone (4 a) tabular...‘fluor-elbaite’, pink beryl, hafnon, columbite (Mn), tantalite (Mn), fluor-microlite, fluor-apatite, florencite |  | | Journal (issue) | | SEPTEMBER–OCTOBER 2019 Articles The Golconda District, Minas Gerais, Brazil ..........................First Edition, 1903, pg 231, plate 44 Miask, Ilmen Mts., Chelyabinsk Oblast, Russia 12.3 cm Zincolivenite...Cleavelandite N Chwaning I Mine, South Africa Stak Nala, Pakistan 4.4 x 3.6 x 2.9cm 10.0 x 6.0 x 3.6cm WE...volume 50, September–October, 2019 The Golconda District Minas Gerais, Brazil Carlos Cornejo1 Andrea Bartorelli2...found at different times in other mines in the district, including the Areião, Pedra Azul or Zé Pedra |  | | Book (edition) | | munic. St. Ste. Is. Mt. district municipio Saint Sainte island mount, mountain Mts. R. Penin. Vole. Plat...(NH4)4NaFe2[(OH)2Cll(SO4)4)Willichen, all Schwarzwald Mts., ermany, also at the (7.B). Tetragonal, 14,lacd...of the Verkhnyy Chegem caldera, Northern aucasus Mts., Ru sia. ZRMO 141, 2, 21-31, 2012. ALLANITE-(ND)...baratovite, etc. in the Dara-i-Pioz alkaline massif, Alai Mts., Tajikistan. NDM 45, 5-16, 2010. Alflarsenite NaCa...near Madrid, Spain, on the Ulyn Khuren Mt., Altai Mts., Mongolia, in pegmatites in Japan, etc. AM 97, 983-988 |  | | Book | | 130–140 In (Hg2)3(AsO4)2 (Baran et al. 1999b) VI Mn –O *310 Octahedra with 8 edges shared per MnO6...water preferably occupies unit cells in which Fe or Mn are substituted with calcium that is present in these...Natural metasomatic sanidine from Volkesfeld, Eifel Mts., Germany contains only traces of structurally bound...(MgR2+R2+)– OH–□ and (MgMgR3+)–OH–□ where R = Fe or Mn (Ishida and Hawthorne 2001). Consequently, taking...2001; see Table 1.6). As a result of annealing of Mn-bearing arfvedsonite in air, the OH stretching band |
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