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Comments: Dark brown to nearly black crystals of krettnichite.
Location: Johann Shaft; Jakob Tunnel (Dump), Krettnich, Wadern, Saarland, Germany.
Scale: Picture size 3.5 mm.
© Thomas Witzke / Abraxas-Verlag
Krettnichite: PbMn+++2(VO4)2(OH)2 Brackebuschite: Pb2(Mn,Fe++)(VO4)2(OH)
Comments: Scanning electron microscope image of a prismatic krettnichite (kr) aggregate associated with manganite (ma) and barian brackebuschite (br) in a vug. The inset is a close-up illustrating the morphology of brackebuschite. (Eur. J. Mineral, 13:146).
Location: hydrothermal manganite-quartz vein at the historic manganese deposit of Krettnich, Saarland, Germany.
Scale: See Image.
© Eur. J. Mineral