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Manganese is a
chemical element; it has
symbol Mn and
atomic number 25. It is a hard, brittle,
silvery metal,
often found in
minerals in
combination with...
- is a
group name for hard
black manganese oxides including hollandite and romanechite.
Psilomelane consists of
hydrous manganese oxide with
variable amounts...
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mineral consisting essentially of
manganese dioxide (MnO2) and is
important as an ore of
manganese. It is a
black,
amorphous appearing mineral, often...
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often missing their skin layer, the
white ash layer) was
painted with
black manganese giving their color. The red
mummy technique (2500 BCE to 2000 BCE)...
- nodules, also
called manganese nodules, are
mineral concretions on the sea
bottom formed of
concentric layers of iron and
manganese hydroxides around a...
- game engine.
Stands for "Where's All the Data?" Wad (mineral), any
black manganese oxide or
hydroxide mineral rich rock of
various ore
deposits WAD, the...
- were red (iron oxide, hematite, or red ochre) and
black (
manganese dioxide, pyrolusite),
though black from
juniper or pine
carbons has also been discovered...
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largest manganese reserves in
South Africa having estimated reserves of 70.4
million tonnes of
manganese ore
grading 39%
manganese metal. "
Black Rock manganese...
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Manganese dioxide is the
inorganic compound with the
formula MnO 2. This
blackish or
brown solid occurs naturally as the
mineral pyrolusite,
which is...
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Rhodonite is a
manganese inosilicate, with the
formula (Mn, Fe, Mg, Ca)SiO3, and
member of the
pyroxenoid group of minerals,
crystallizing in the triclinic...
