Tegengrenite
(Mg, Mn)2Sb0.5(Mn3+, Si, Ti)0.5O4
The new mineral Tegengrenite (red) showing red internal reflections, with hausmannite, from Jakobsberg, Värmland, Sweden. Polished section, x-nicols. Size 1.5 mm.
Photo Kjell Gatedal, School of Mines and Metallurgy, Filipstad, Sweden. Copyright © 2000 Dept of Mineralogy. All Rights Reserved.
Holtstam, D. and Larsson, A.-K. (2000): Tegengrenite, a new, rhombohedral spinel-related Sb mineral from the Jakobsberg Fe-Mn deposit, Värmland, Sweden. Amer. Mineral. 85, 1313-1318.
