MOTS EN ANGLAIS EN RAPPORT AVEC «BRAUNITE»
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10 LIVRES EN ANGLAIS EN RAPPORT AVEC «BRAUNITE»
Découvrez l'usage de
braunite dans la sélection bibliographique suivante. Des livres en rapport avec
braunite et de courts extraits de ceux-ci pour replacer dans son contexte son utilisation littéraire.
1
U.S. Geological Survey Professional Paper
BRAUNITE PROTOLITH Braunite occurs as thin laminations (10 n.m) commonly
grouped into layers (B71b, fig. 6A; B81, fig. AF; B95, fig. 5F) that may be so
closely spaced as to appear massive (65H19, 65H170). Opaque braunite layers
range ...
2
Geological Survey Professional Paper
Many oxides and rhodochrosite remain intact during metamorphism in
environments low in Al and Si. Many primary oxides stable in low-grade
metamorphism] ) Manganite 2? Bixbyite 3 (all grades) Braunite 3 (all grades)
Hollandite 3 (all ...
3
New Zealand Journal of Geology and Geophysics
FIG. 7 — Oolites within chert composed of braunite (grey) and bemenite (within
oolite, but same colour as surrounding chert). Bar is 0'02 mm. amounts of other
minerals. Braunite forms xenomorphic and hypidiomorphic polygonal aggregates
...
4
Atlas of the Textural Patterns of Ore Minerals and ...
592 Braunite with epitactic jacobsite in cases including a relic of the braunite in
the epitactic jacobsite. The epitactic jacobsite extends also into the braunite. b =
braunite. j = jacobsite, arrow shows relic of braunite in epitactic jacobsite.
Stylianos Augustithis,
1995
5
The Ore Minerals Under the Microscope: An Optical Guide
Strunz Classification - Group Members - Chemical Formula - Crystallography VIII/
B.09-Braunite-Långbanite-Katoptrite series Descriptions A Braunite crystals (
brownish grey, slight bireflectance), partially cemented by crednerite (light grey, ...
6
Manganese Mineralization: Geochemistry and Mineralogy of ...
In the ore horizons, braunite and hollandite are the principal minerals with
bixbyite and rare jacobsite and rare vredenburgite. Manganese minerals in the
gondites are spessartine and rhodite, together with quartz and aluminosilicates.
7
Industrial Minerals & Rocks: Commodities, Markets, and Uses
The first group (Type I) is lenticular bodies (actually clusters of lenticular bodies)
of bedded rhodochrosite with lesser braunite within belts of early Precambrian (
Archean) basic volcanic rocks ("greenstone belts"). Type 1 deposits are clustered
...
Jessica Elzea Kogel,
2006
Veins of manganese ore containing chiefly manganite, subordinated pyrolusite,
braunite, hausmannite, psilomelane, wad, and varvacite, occur at the Ilfeld," in
the Harz Mountains. The associated gangue minerals are barite, calcite, dolomite
, ...
9
Stratabound Ore Deposits in the Andes
Pyrolusite (Mn02) occurs in pores as microcrystalline aggregates within braunite,
hausmannite, and a -vredenburgite, or associated with manjiroite and
cryptomelane in the matrix or as veinlets. Braunite and hausmannite are replaced
by ...
10
The Goodnews Platinum Deposits, Alaska
Braunite. — Braunite is a steel-gray mineral that has a brownish- black streak
and submetallic luster and a hardness of 5.5 to 6. It is weakly magnetic and is
either granular or crystalline but generally crystalline. The composition is usually
...
2 ACTUALITÉS CONTENANT LE TERME «BRAUNITE»
Découvrez de quoi on parle dans les médias nationaux et internationaux et comment le terme
braunite est employé dans le contexte des actualités suivantes.
Manganese Iron Oxide (MnFe2O4) Nanoparticles - Properties …
Manganese is found in braunite, psilomelane, pyrolusite, and rhodochrosite, while iron is found in the minerals hematite and magnetite. «AZoNano.com, juil 13»
X-Ray Diffraction (XRD) - Quantitative Mineralogy by Phase Analysis …
Commonly present minerals are: braunite Mn2+Mn3+6SiO12, hematite Fe2O3, hausmannite Mn2+Mn3+ 2O4, jacobsite (Mn2+,Fe2+,Mg)(Fe3+ ... «Azom.com, juin 09»