New Mineral Names*
American Mineralogist, Volume 87, pages 1731–1735, 2002 New Mineral Names* JOHN L. JAMBOR1,† AND ANDREW C. ROBERTS2 1Department of Earth and Ocean Sciences, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada 2Geological Survey of Canada, 601 Booth Street, Ottawa K1A 0E8, Canada BRODTKORBITE* The mineral occurs as blue crusts, to 5 mm thickness, and W.H. Paar, D. Topa, A.C. Roberts, A.J. Criddle, G. Amann, as coatings, globules, and fillings in thin fissures. The globules µ R.J. Sureda (2002) The new mineral species brodtkorbite, consist of pseudohexagonal platelets, up to 50 m across and <0.5 µm thick. Electron microprobe analysis gave Y2O3 42.2, Cu2HgSe2, and the associated selenide assemblage from Tuminico, Sierra de Cacho, La Rioja, Argentina. Can. Min- La2O3 0.3, Pr2O3 0.1, Nd2O3 1.3, Sm2O3 1.0, Gd2O3 4.8, Tb2O3 eral., 40, 225–237. 0.4, Dy2O3 3.7, Ho2O3 2.6, Er2O3 2.5, CaO 0.5, CuO 10.9, Cl 3.0, CO2 (CHN) 19.8, H2O (CHN) 10.8, O ≡ Cl 0.7, sum 103.2 Electron microprobe analyses gave Cu 26.2, Hg 40.7, Se wt%, corresponding to (Y3.08Gd0.22Dy0.16Ho0.11Er0.10 Nd0.06Sm0.05 Tb0.02La0.02Pr0.01Ca0.08)Σ3.91 Cu1.12(CO3)3.7Cl0.7(OH)5.79 ·2.4H2O, 32.9, sum 99.8 wt%, corresponding to Cu2.00Hg0.98Se2.02, ide- simplified as (Y,REE)4Cu(CO3)4Cl(OH)5·2H2O. Transparent, ally Cu2HgSe2. The mineral occurs as dark gray individual anhedral grains, up to 50 × 100 µm, and as aggregates to 150 × vitreous to pearly luster, pale blue streak, H = ~4, no cleavage 250 µm.
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