Named in honor of H. Baumhauer (1848-1926), professor of mineralogy at the University
of Fribourg (Switzerland). The crystals are triclinic, lead-gray in color (often
with red internal reflections) a little pale than that of the sartorite and also
with metallic bright, but sometimes can be covered with a dull film. The main
feature of the crystals is the rounded shape, present both on the longitudinal
axis and in the terminal faces. It usually presents a smooth side very bright
(100). It’s normally associated with realgar.
Baumhauerite-2a
Named after his relationship with the former mineral (the a parameter of the
elementary cell is twice the corresponding to the baumhauerite)
is one of the minerals that has been described recently from Lengenbach (Pring et
al., 1990). It has been found as microscopic inclusions of gray steel color
in baumhauerite. Baumhauerite-2a is monoclinic and, unlike baumhauerite,
contains a small proportion of silver.
Baumhauerite-ΨO3abc
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Unusual Baumhauerite crystals on Dolomite.
Very developed on c-axis. |
| Field of view 2 mm. |
| Collection and Photo: Stephan Wolfsried. |
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Photo Copyright © Stephan
Wolfsried 6/2006
This image is copyrighted. Unauthorized reproduction prohibited. |
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