-
Amphiboles can be green, black, colorless, white, yellow, blue, or brown. The
International Mineralogical ****ociation
currently classifies amphiboles...
-
smoking from Belgium, with
inscription "Real
asbestos best quality".
Amphiboles including amosite (brown asbestos) and
crocidolite (blue asbestos) were...
- of magnesium-rich
amphibole, the
latter being metastable. ****mingtonite
shares few
compositional similarities with
alkali amphiboles such as arfvedsonite...
- of
hornblende amphibole is
called a hornblendite,
which is
usually a
crystal ****ulate rock.
Igneous rocks with
greater than 90%
amphiboles,
which have a...
- minerals, such as
olivine and pyroxene. However,
micas and aluminium-rich
amphiboles were excluded,
while some
calcium minerals containing little iron or magnesium...
- The
major examples of
these are quartz, the feldspars, the micas, the
amphiboles, the pyroxenes, the olivines, and calcite;
except for the last one, all...
-
Riebeckite is a sodium-rich
member of the
amphibole group of
silicate minerals,
chemical formula Na2(Fe2+3Fe3+2)Si8O22(OH)2. It
forms a
solid solution...
- + Na2O) are
described as peralkaline, and they
contain unusual sodium amphiboles such as riebeckite.
Granites in
which there is an
excess of
aluminum beyond...
- but the name is used as a
general or
field term, to
refer to a dark
amphibole.
Hornblende minerals are
common in
igneous and
metamorphic rocks. The...
-
substitutes extensively for
silicon in
silicates such as
feldspars and
amphiboles, the
substitution occurs only to a
limited extent in most pyroxenes. They...
