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Amphibole (/ˈæmfəboʊl/ AM-fə-bohl) is a
group of
inosilicate minerals,
forming prism or
needlelike crystals,
composed of
double chain SiO 4 tetrahedra...
- in the
amphibole group was
banned in much of the
Western world by the mid-1980s, and in ****an by 1995. Some
products that
included amphibole types of...
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appearance from the
parallel intergrowth of
quartz crystals and
altered amphibole fibres that have
mostly turned into limonite.
Tiger iron is an altered...
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Amphibolite (/æmˈfɪbəlaɪt/) is a
metamorphic rock that
contains amphibole,
especially hornblende and actinolite, as well as
plagioclase feldspar, but...
- ****mingtonite (/ˈkʌmɪŋtənaɪt/ KUM-ing-tə-nyte) is a
metamorphic amphibole with the
chemical composition (Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2, magnesium...
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quartz and
alkali feldspar. Most
granitic rocks also
contain mica or
amphibole minerals,
though a few (known as leucogranites)
contain almost no dark...
- 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...
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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...
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silicate mineral names:
nephrite (a
silicate of
calcium and
magnesium in the
amphibole group of minerals), or
jadeite (a
silicate of
sodium and
aluminum in the...
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species of
amphibole,
although variations, as in the pyroxenes, most
commonly involve mixtures of Ca2+, Fe2+ and Mg2+.
Several amphibole mineral species...
