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Acicular, in mineralogy,
refers to a
crystal habit composed of slender, needle-like crystals.
Crystals with this
habit tend to be fragile. Complete, undamaged...
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Acicular may
refer to In botany: a
slender leaf
shape In mineralogy:
Acicular (crystal habit)
refers to a needle-like
crystal form
Acicular ferrite, a...
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Acicular ferrite is a
microstructure of
ferrite in
steel that is
characterised by needle-shaped
crystallites or
grains when
viewed in two dimensions. The...
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chemical precipitation.
Individual crystals are rare, but
occur as
slender to
acicular prisms.
Pseudomorphs after more
tabular or
blocky azurite crystals also...
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Rutilated quartz is a
variety of
quartz which contains acicular (needle-like)
inclusions of rutile. It is used for gemstones.
These inclusions mostly look...
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altered igneous rocks, and in
certain gneisses and schists. In
groups of
acicular crystals it is
frequently seen
penetrating quartz as in the fléches d'amour...
- show a
variety of habits, but the most
common are tabular, prismatic, or
acicular (columnar) crystals,
often with no
imperfections or inclusions. Twinned...
- bi****h with
formula Pb Cu Bi S3. It
forms black to grey or
reddish brown acicular orthorhombic crystals with a Mohs
hardness of 2 to 2.5 and a
specific gravity...
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orthorhombic system. The
normal form is as m****ive encrustations,
while acicular or
fibrous crystals are
rarely found. It is
colorless to
white with tints...
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porphyritic granite,
notable for the
presence of
clusters of radially-arranged
acicular tourmaline crystals enclosed by
phenocrysts of
orthoclase and
quartz in...
