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Topics referred to by the same term
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
Acicular
Crystal shape resembling slender needles
In mineralogy, acicular refers to a crystal habit composed of slender, needle-like crystals. Crystals with this habit tend to be fragile; complete, undamaged
Acicular_(crystal_habit)
Steel microstructure characterized by long needle-like grains
Acicular ferrite is a microstructure of ferrite in steel that is characterised by needle-shaped crystallites or grains when viewed in two dimensions. The
Acicular_ferrite
Mineral variety of copper carbonate
chemical precipitation. Individual crystals are rare, but occur as slender to acicular prisms. Pseudomorphs after more tabular or blocky azurite crystals also
Malachite
Calcium carbonate mineral
resulting in a different crystal shape, an orthorhombic crystal system with acicular crystal. Repeated twinning results in pseudo-hexagonal forms. Aragonite
Aragonite
Mineral (hydrated sodium calcium borate hydroxide)
deposits, and the precipitated ulexite commonly forms a "cotton ball" tuft of acicular crystals. Ulexite is frequently found associated with colemanite, borax
Ulexite
Oxide mineral composed of titanium dioxide
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
Rutile
Transparent variety of gypsum
show a variety of habits, but the most common are tabular, prismatic, or acicular (columnar) crystals, often with no imperfections or inclusions. Twinned
Selenite_(gypsum)
Index of articles associated with the same name
Sagenite may refer to any of the following types of minerals with an acicular (needle-shaped) crystal habit. It is not a valid mineral species. A twinned
Sagenite
Mineral form of potassium nitrate
and nitrate seep into the openings. It occasionally occurs as prismatic acicular crystal groups, and individual crystals commonly show pseudohexagonal twinning
Niter
Quartz variety
(also known as Venus' Hair Stone) is a variety of quartz which contains acicular (needle-like) inclusions of rutile. It is used for gemstones. These inclusions
Rutilated_quartz
Alloy steel
and also forms oxides that are necessary for the nucleation of acicular ferrite. Acicular ferrite is desirable in HY-80 steels because it promotes excellent
HY-80
Zeolite mineral in the natrolite subgroup
Mesolite crystallizes in the orthorhombic system and typically forms fibrous, acicular prismatic crystals or masses. Radiating sprays of needlelike crystals are
Mesolite
Nickel sulfide mineral
blende is a nickel sulfide mineral, NiS. It is brassy in colour and has an acicular habit, often forming radiating masses and furry aggregates. It can be distinguished
Millerite
Zeolite mineral
stone or needle-zeolite are other informal names, alluding to the common acicular habit of the crystals, which are often very slender and are aggregated
Natrolite
Sulfate mineral
orthorhombic system. The normal form is as massive encrustations, while acicular or fibrous crystals are rarely found. It is colorless to white with tints
Epsomite
Image Term Latin Refers principally to Description acicular acicularis whole leaf Slender and pointed, needle-like acuminate acuminatus leaf tip Tapering
Glossary_of_leaf_morphology
Copper silicate hydroxide mineral
system and usually occurs in a granular massive form and also as fibrous acicular crystals. It is closely allied to plancheite in structure and appearance
Shattuckite
mineral composed of tellurium dioxide (TeO2). It occurs as prismatic to acicular transparent yellow to white orthorhombic crystals. It occurs in the oxidation
Tellurite_(mineral)
bismuth 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
Aikinite
Sodium-rich member of the amphibole group of silicate minerals
crystals showing a diamond-shaped cross section, but also in fibrous, bladed, acicular, columnar, and radiating forms. Its Mohs hardness is 5.0–6.0, and its specific
Riebeckite
Calcium sulfate mineral
Bassanite White radial-acicular bassanite crystals from Kimba, Eyre Peninsula, South Australia General Category Sulfate mineral Formula CaSO4·1/2H2O
Bassanite
Rare type of granite
tournalinized granite, notable for the presence of clusters of radially-arranged acicular tourmaline crystals enclosed by phenocrysts of orthoclase and quartz in
Luxullianite
Hydrated copper silicate mineral
silica tetrahedra parallel to the c crystal axis. It occurs as sprays of acicular or fibrous radial clusters, with fibers extended parallel to the chains
Plancheite
Mixture with a lower melting point than its constituents
structure, but other possible structures include rodlike, globular, and acicular. Besides, a vermicular microstructure has been observed in a high-entropy
Eutectic_system
Rare carbonate mineral and raw material for the extraction of strontium
habits. Crystals are short prismatic parallel to the c axis and often acicular. Calcium-rich varieties often show steep pyramidal forms. Crystals may
Strontianite
Blue gemstone from Dominican Republic
Identification Color Shades of blue, blue-green Crystal habit Tabular to acicular, radiating fibrous, spheroidal, or columnar; massive Twinning Twin axis
Larimar
Secondary uranium mineral
grass green to dark green in color, and its crystal habit is typically acicular, flat bladed crystals. It is a strongly radioactive mineral. Cuprosklodowskite
Cuprosklodowskite
Halide mineral
chloride hexahydrate mineral with formula CaCl2·6H2O. It forms colorless acicular trigonal crystals. It is hygroscopic and has a low relative density of
Antarcticite
Single chain calcium inosilicate (CaSiO3)
yield while capturing CO 2. The acicular nature of many wollastonite products allows it to compete with other acicular materials, such as ceramic fiber
Wollastonite
Nesosilicate mineral
Identification Color Colorless to pale pink or grey Crystal habit Prismatic to acicular crystals Cleavage Good on [010] Optical properties Biaxial (+) Refractive
Mullite
Hydrous copper arsenate mineral
Cu3AsO4(OH)3. Clinoclase is a rare secondary copper mineral and forms acicular crystals in the fractured weathered zone above copper sulfide deposits
Clinoclase
Copper sulfate mineral
can range from emerald green to black-green to blue-green, and can be acicular or prismatic. Brochantite is often associated with minerals such as malachite
Brochantite
Nesosilicate mineral
Color Colorless, yellow, pink, brown Crystal habit Tabular, prismatic to acicular crystals often as columnar aggregates, as spherulites and granular Twinning
Phenakite
Banded variety of chalcedony
from Maramureș Onyx from Germany Sagenitic agates, or sagenites, have acicular (needle-shaped) inclusions of another mineral, usually anhydrite, aragonite
Agate
Calcium vanadium phyllosilicate mineral
Identification Color Brilliant sky-blue to greenish blue Crystal habit Radiating acicular prismatic crystals commonly as spherulitic rosettes Cleavage Good on {010}
Cavansite
Heat treatment in ferrous materials
bainite microstructure whereas in cast irons it produces a structure of acicular ferrite and high-carbon-stabilized austenite known as ausferrite. It is
Austempering
Calcium inosilicate mineral
crystallizes in the monoclinic – prismatic crystal system, with typically an acicular crystal form or habit, meaning it occurs as needle-like crystals. It is
Xonotlite
Star-shaped reflection
reflections of light from twin-lamellae or from extremely fine needle-shaped acicular inclusions within the stone's crystal structure. A common cause is oriented
Asterism_(gemology)
Cyclosilicate, mineral
represented by elbaite, some exhibiting multicolor zonation. Microscopic acicular inclusions in some elbaite crystals show the cat's eye effect in polished
Elbaite
Arsenate mineral
light Crystal habit Well developed orthorhombic crystals of bladed or acicular habit elongated parallel to the c axis, sometimes with sceptre-like terminations
Austinite
Snowflake-like speleothem
In geology, frostwork is a type of speleothem with acicular ("needle-like") growths almost always composed of aragonite (a polymorph of calcite) or calcite
Frostwork_(geology)
Halide mineral
crystallizing in the hexagonal system. It occurs as tufts of very delicate acicular crystals of a fine blue color, and is associated with other copper minerals
Connellite
Uranium mineral
contains magnesium and is a bright yellow colour, its crystal habit is acicular, but can form in other shapes. It has a Mohs hardness of about 2–3. It
Sklodowskite
Hydrated sodium borate hydroxide mineral
crystallizing in the monoclinic crystal system typically occurring as prismatic to acicular crystals or granular masses. It is relatively soft with Mohs hardness of
Kernite
massive). Crystal appearance (foliated/lamellar (layered), dendritic, bladed, acicular, lenticular, tabular (tablet shaped)). Thrust tectonics Extensional tectonics
Prism_(geology)
Species of cactus
Spines on the adult branches are 1 to 4 mm (0.039 to 0.157 in) long, being acicular (needle-like) to almost conical, and greyish brown to black in colour and
Selenicereus_undatus
radial acicular crystal aggregates of extremely fine fibers. It crystallizes in the monoclinic system and forms translucent bright blue acicular crystal
Cyanotrichite
Crystalline chemical element or compound formed by geologic processes
Several terms are used to describe this property. Common habits include acicular, which describes needle-like crystals as in natrolite; dendritic (tree-pattern)
Mineral
Zeolite mineral
pseudotetragonal. Scolecite, like natrolite and mesolite, usually occurs as acicular (needle-like) and fibrous aggregations. It has nearly the same angles between
Scolecite
Light yellow mineral of the strunzite group
Z = 2 Identification Color Straw yellow to brownish yellow Crystal habit Acicular Mohs scale hardness 4 Luster vitreous Streak white Specific gravity 2.52
Strunzite
Copper sulfate mineral
sulfate mineral, with the formula Cu3(SO4)(OH)4. It occurs in tabular, acicular, or fibrous crystals with a vitreous luster. Originally believed to be
Antlerite
Mineral
2/m) Space group Pbca Identification Color Red, pink, black Crystal habit Acicular – cccurs as needle-like crystals Cleavage {100} good Fracture Very brittle
Hutchinsonite
Sulfosalt mineral
mineral composed of lead antimony sulfide Pb9Sb22S42. Zinkenite occurs as acicular needle-like crystals. It was first described in 1826 for an occurrence
Zinkenite
Coating or deposit of ice
ranging from long dendritic crystals (tree-like) growing across a surface, acicular crystals (needle-like) growing outward from the surface, snowflake-shaped
Frost
Genus of fishes
bearing molar-like teeth, or are oval shaped or subtriangular and bearing acicular (needle-like) or conic teeth. A. jatius lacks these tooth plates, but has
Arius_(fish)
Type of alloy steel
by precipitation hardening. Acicular ferrite steels: These steels are characterized by a very fine high strength acicular ferrite structure, a very low
High-strength_low-alloy_steel
Speleothems composed of long needle-like crystals situated in clusters
The individual crystals of anthodites develop in a form described as "acicular" (needle-like) and often branch out as they grow. They usually grow downward
Anthodite
Phenomenon of certain material grains growing faster than others
materials, this phenomenon can result in the formation of elongated prismatic, acicular (needle-like) grains in a densified matrix. This microstructure has the
Abnormal_grain_growth
Mineral
= 14.2 Å; Z = 16 Identification Colour Yellow Crystal habit Occurs as acicular to elongated bladed crystals, flattened on {010}, also as radiating fibrous
Weeksite
Solid carbon-rich material
particularly ash and volatile matter contents. Needle coke, also called acicular coke, is a highly crystalline petroleum coke used in the production of
Petroleum_coke
Oxide mineral
67 [Å]; Z = 3 Identification Color Black Crystal habit Anhedral, can be acicular - occurs as needle-like crystals Fracture conchoidal Mohs scale hardness
Loveringite
Cave formation
the definition of the word. Rimstone pool with subaques coralloids and Acicular (crystal habit) aragonite Oddly colored rimstone with scale Pool spar inside
Rimstone
Lead sulfate mineral
county of Lanarkshire, hence the name. It forms white or light green, acicular monoclinic prismatic crystals, usually microscopic in size. It is an oxidation
Lanarkite
Lead carbonate mineral
Broken Hill in New South Wales, and several other localities. Delicate acicular crystals of considerable length were found long ago in the Pentire Glaze
Cerussite
Genus of annelid worms
exchange. They may have two types of setae, which are found on the parapodia. Acicular setae provide support. Locomotor setae are for crawling, and are the bristles
Nereis
is a bright green to duller bottle green colour. Its crystal habit is acicular, it is most likely to be found along with the uranyl selenium mineral demesmaekerite
Derriksite
Species of flowering plant in the daisy family Asteraceae
isoalantolactone. Helenin is a stearoptene, which may be prepared in white acicular crystals, insoluble in water, but freely soluble in alcohol. When freed
Elecampane
Uncommon barium feldspar mineral
adularia, larger, stout crystals (Spencer, 1941), and long, slender to acicular. It is usually colorless and transparent with a pearly to non-fluorescent
Celsian
Mineral made of silicon and oxygen
Clear with golden-yellow or black inclusions Mineral inclusions Contains acicular (needle-like) inclusions of rutile Macrocrystalline Transparent to translucent
Quartz
Antimony oxide mineral
Identification Color Yellow to nearly white Crystal habit Microscopic acicular crystals; massive Cleavage Excellent on {001}, distinct on {100} Fracture
Cervantite
Common iron oxide mineral
Tabular, rhombohedral, pseudo-octahedral, pseudo-cubic and very rarely also acicular crystals. Twinning Not well observed Cleavage Distinct on {001} Fracture
Segnitite
Place in Batken, Kyrgyzstan
provisions which will eliminate primary mercury mining. Blue fur-like mass of acicular crystals of the Copper-Aluminium mineral Khaidarkanite (Cyanotrichite group)
Aydarken
Hydrous manganese oxide mineral
intergrowths of elongated crystallites resembling the twinned variety of acicular rutile have been observed by electron microscopy in todorokites from an
Todorokite
Iron(III) oxide-hydroxide named in honor to the poet Goethe
Color Yellowish to reddish to dark brown or black Crystal habit Radial acicular, mammillary, botryoidal, stalactitic, massive, as encrustation, as pseudomorph;
Goethite
= 5.13 [Å]; Z = 8 Identification Color Yellow Crystal habit Prismatic, acicular to fibrous clusters Twinning On {100} Cleavage Perfect on {010} Tenacity
Carpholite
Iron aluminium phosphate mineral
yellow, deep orange, green; yellow in transmitted light Crystal habit Acicular, radial, stellate Cleavage None Fracture Uneven Mohs scale hardness 3–4
Cacoxenite
Thomsonite series of the zeolite group
spikey in appearance, dense and ball-like, or form worm-like growths. Tight acicular radiating clusters and sphericules are common forms. Thomsonite occurs
Thomsonite
Genus of annelids
lateral antennae are inserted terminoventrally. Parapodia with elongate acicular lobes with both acicula penetrating epidermis. The notochaetae are stout
Acholoe_squamosa
Fibrous amphibole mineral discovered in Sicily
Colour Light green to light yellow, grey-black Crystal habit Prismatic, acicular, fibrous (asbestiform) Twinning None mentioned Cleavage Perfect on {110}
Fluoro-edenite
Arsenic sulfide mineral
United States Cherry-red realgar crystals atop a matrix, and a sharp acicular spray of the rare species picropharmacolite (white needles) below Crystals
Realgar
Mineral
Lustrous, acicular, deep wine-red kermesite crystals, up to 4 cm long, on massive sulfide matrix, from Pezinok, Malé Karpaty Mts, Bratislava Region, Slovakia
Kermesite
Halide mineral
colorless to white to purple monoclinic prismatic crystals. It often occurs as acicular radiating sprays of fine prisms. It is translucent to transparent with
Creedite
Lead chromate mineral
orange-red in transmitted light. Crystal habit Coarsely crystalline to acicular Cleavage Distinct on {110} indistinct on {001} and {100} Fracture Conchoidal
Crocoite
Species of flowering plant
The plant has slender stems with dense leaves. The leaves are narrow or acicular with stiff hairs on the edges and stand semi-erect. The flower heads are
Chrysocoma_ciliata
Type of iron-colored agate
favorite among agate collectors. Sagenitic agates, or sagenites, have acicular (needle-shaped) inclusions of another mineral, usually a zeolite such as
Lake_Superior_agate
Oxide mineral
Color Brown, light brown, brownish black, yellow, black Crystal habit Acicular, massive Cleavage None Fracture Brittle - conchoidal Tenacity Brittle Mohs
Aeschynite-(Ce)
Sulfosalt mineral
series with benavidesite. It is a dark grey metallic mineral which forms acicular prismatic monoclinic crystals. It is soft with a Mohs hardness of 2.5 and
Jamesonite
Soft and porous white magnesium phyllosilicate clay
transformation based on the Yoshida effect can utilize sepiolite as an acicular nanofiber. The Yoshida effect is the transfer of DNA to a bacterial cell
Sepiolite
Alloy of iron and nickel found in meteorites
Meteorites" and Massalski's "Speculations about Plessite" are:[citation needed] acicular or type I plessite black or type II plessite cellular or type III plessite
Plessite
Sincosite Sincosite with an associated spray of white, acicular minyulite; from Ross Hannibal Mine, South Dakota, US General Category Vanadate minerals
Sincosite
Sulfate mineral
typically occurs as fibrous or powdery encrustations, but may also occur as acicular triclinic crystals. It was first described in 1891 for an occurrence in
Siderotil
Fibrous zeolite mineral
(no. 194) Identification Color White, Green, Gray, Orange Crystal habit Acicular - Occurs as needle-like crystals (asbestosform). Cleavage [010] Distinct
Erionite
Copper arsenate mineral
terminated by domal faces. More commonly, it occurs as globular aggregates of acicular crystals, these fibrous forms often having a velvety luster; sometimes
Olivenite
Very rare organic mineral
Identification Color Yellow, yellowish brown on exposure Crystal habit Acicular to thin tabular in bladed groups and fibrous radiating aggregates Cleavage
Carpathite
Concrete degradation mainly caused by ettringite crystallization
sulfate ions to form ettringite (AFt). Ettringite crystallizes into small acicular needles slowly growing in the concrete pores. Once the pores are completely
Sulfate attack in concrete and mortar
Sulfate_attack_in_concrete_and_mortar
Iron-arsenic sulfide mineral
3°; Z = 4 Identification Colour Steel grey to silver white Crystal habit Acicular, off-square prismatic, stubby; striated; also compact, granular, columnar
Arsenopyrite
Species of nocturnal cactus native to Central America and the Caribbean
(6–)12–20 mm; spines 5–18, to 4.5–12 mm, basally ca 0,25 mm in diameter, acicular, elliptic or circular in cross section, bulbous basally, spreading, yellowish
Selenicereus_grandiflorus
Species of gastropod
mm, its diameter 1.3 mm. (Original description) The shell is minute and acicular, with the body whorl being very high and spirally striate. The sculpture
Aoteatilia_acicula
Extinct genus of ferns
Cretaceous forests. The fronds were slender and rigid, bearing narrow, acicular (needle-like) pinnae. This morphology likely provided structural support
Aculea
ACICULAR
ACICULAR
ACICULAR
ACICULAR
Girl/Female
Hindu, Indian, Malayalam, Marathi
The Beloved One
Boy/Male
Arabic, Muslim, Parsi
Firm; Solid
Boy/Male
Anglo Saxon
Quick.
Boy/Male
Arabic
Good Health; Ease; Comfort
Male
Cornish
, high one.
Girl/Female
Muslim/Islamic
Advice
Boy/Male
Shakespearean
The Winter's Tale' Lord of Sicilia.
Boy/Male
Hindu
Male
African
the slandered one.
Girl/Female
American, British, Christian, English, German
From Lorraine; Kingdom of Lothar; Made Famous in Battle
ACICULAR
ACICULAR
ACICULAR
ACICULAR
ACICULAR
a.
Resembling sagenite; -- applied to quartz when containing acicular crystals of other minerals, most commonly rutile, also tourmaline, actinolite, and the like.
n.
Acicular rutile occurring in reticulated forms imbedded in quartz.
a.
Needle-shaped; acicular.
n.
A large genus of evergreen coniferous trees, mostly found in the northern hemisphere. The genus formerly included the firs, spruces, larches, and hemlocks, but is now limited to those trees which have the primary leaves of the branchlets reduced to mere scales, and the secondary ones (pine needles) acicular, and usually in fascicles of two to seven. See Pine.
a.
Needle-shaped; slender like a needle or bristle, as some leaves or crystals; also, having sharp points like needless.
n.
A kind of crystallite having a (slender) acicular form.
a.
Acicular.
n.
A zeolite occuring in groups of glassy acicular crystals, and in masses which often have a radiated structure. It is a hydrous silicate of alumina and soda.
n.
Minute acicular or dendritic crystalline forms sometimes observed in glassy volcanic rocks.