- is a
chemical compound of
aluminium and
oxygen with the
chemical formula Al2O3. It is the most
commonly occurring of
several aluminium oxides, and specifically...
-
Corundum is a
crystalline form of
aluminium oxide (
Al2O3)
typically containing traces of iron, titanium, vanadium, and chromium. It is a rock-forming...
-
commonly applied to
chemical compounds which are
derived from
aluminium oxide,
Al2O3 and
silicon dioxide, SiO2
which may be
anhydrous or hydrated, naturally...
- most
important ore of aluminium,
contains only 30–60%
aluminium oxide (
Al2O3), the rest
being a
mixture of silica,
various iron oxides, and titanium...
-
applications the same
formula is
typically written in
terms of oxides, thus
giving Al2O3·2SiO2·2H2O.
Compared with
other clay minerals,
kaolinite is
chemically and...
-
generally as a "mineral
aggregate composed of
hydrous silicates of
aluminium (
Al2O3·2SiO2·2H2O) with or
without free silica." High-grade fire
clays can withstand...
- Sapphire, ruby, and pure
corundum are α-alumina, the most
stable form of
Al2O3, in
which 3
electrons leave each
aluminium ion to join the
regular octahedral...
-
composition can be
represented only by
metastable forms (gamma-
Al2O3 etc.).
Corundum (alpha-
Al2O3), the only
stable form of
aluminum oxide, does not have such...
-
having a
formula variously given as NaAlO2, NaAl(OH)4 (hydrated), Na2O·
Al2O3, or Na2Al2O4.
Commercial sodium aluminate is
available as a
solution or...
-
provides both K2O and Na2O for fluxing, and
Al2O3 and CaO as stabilizers. As an
important source of
Al2O3 for gl****making,
feldspar is
valued for its...
