- of
lower valence such as aluminum. Al for Si
substitution is common.
Nesosilicates (from Gr**** νῆσος nēsos 'island'), or orthosilicates, have the orthosilicate...
- iron
silicate with the
chemical formula (Mg,Fe)2SiO4. It is a type of
nesosilicate or orthosilicate. The
primary component of the Earth's
upper mantle,...
-
Spessartine is a
nesosilicate,
manganese aluminium garnet species, Mn2+3Al2(SiO4)3. This
mineral is
sometimes mistakenly referred to as spessartite. Spessartine's...
-
Phenakite or
phenacite is a
fairly rare
nesosilicate mineral consisting of
beryllium orthosilicate, Be2SiO4.
Occasionally used as a gemstone, phenakite...
- form are
similar to topaz; however,
topaz is a
calcium fluorine bearing nesosilicate. The clarity, resilience, and
strong dispersion of
danburite make it...
-
sphene (from
Ancient Gr**** σφηνώ (sphēnṓ) 'wedge'), is a
calcium titanium nesosilicate mineral, CaTiSiO5.
Trace impurities of iron and
aluminium are typically...
-
Andradite is a
mineral species of the
garnet group. It is a
nesosilicate, with
formula Ca3Fe2Si3O12.
Andradite includes three varieties: Colophonite: a...
-
Staurolite is a
reddish brown to black,
mostly opaque,
nesosilicate mineral with a
white streak. It
crystallizes in the
monoclinic crystal system, has...
-
Datolite is a
calcium boron hydroxide nesosilicate, CaBSiO4(OH). It was
first observed by Jens
Esmark in 1806, and
named by him from δατεῖσθαι, "to divide...
-
Andalusite is an
aluminium nesosilicate mineral with the
chemical formula Al2SiO5. This
mineral was
called andalousite by Delamétherie, who
thought it...
