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Braunite is a
silicate mineral containing both di- and tri-valent
manganese with the
chemical formula: Mn2+Mn3+6[O8|SiO4].
Common impurities include iron...
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metamorphosed sedimentary manganese ore
deposits ****ociated with hyalophane,
braunite and tamaite. It was
first reported for an
occurrence in the
Shiromaru Mine...
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Pyrolusite occurs ****ociated with manganite, hollandite, hausmannite,
braunite, cryptomelane, chalcophanite, goethite, and
hematite under oxidizing conditions...
- A
specimen of m****ive
braunite with
sparkling microcrystalline kentrolite, from the
Norrbotten working, Långban....
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meter (3 ft 3 in)
thick and
extending laterally up to 200
meters (660 ft).
Braunite is the
common manganese mineral type
found in the ore. An
outcrop of deformed...
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contains 0.01 μg/m3.
Manganese occurs prin****lly as
pyrolusite (MnO2),
braunite (Mn2+Mn3+6)SiO12),
psilomelane (Ba,H2O)2Mn5O10, and to a
lesser extent...
- and vugs. It
occurs in ****ociation with hollandite, pyrolusite, nsutite,
braunite, chalcophanite,
manganite and
various other manganese oxides. Polyhedral...
- with beryl, quartz, spessartine, hematite, pseudobrookite, hausmannite,
braunite and
topaz in
pneumatolytic or
hydrothermal veins and
cavities and in metamorphic...
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Botryogen Boulangerite Bournonite Boussingaultite Bowieite Braggite Br****ite
Braunite Brazilianite Breithauptite Brewsterite (series of zeolites) Brezinaite...
- with calcite, barite, and siderite.
Often ****ociated with pyrolusite,
braunite,
hausmannite and goethite.
Manganite occurs in
specimens exhibiting good...
