How to use Acicular in a sentence

acicular
  • The difference between schists and gneisses is mainly that the latter have less highly developed foliation; they also, as a rule, are more coarse grained, and contain far more quartz and felspar, two minerals which rarely assume platy or acicular forms, and hence do not lead to the production of a fissile character in the rocks in which they are important constituents.

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  • As found in nature, saltpetre generally forms aggregates of delicate acicular crystals, and sometimes silky tufts; distinctly developed crystals are not found in nature.

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  • It dissolves in water with evolution of heat; on evaporation a basic salt, ZrOC1 2.8H 2 0, separates out in star-shaped acicular aggregates.

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  • Iodine dissolves in an aqueous solution of the salt to form a dark brown liquid, which on evaporation over sulphuric acid gives black acicular crystals of the tri-iodide, K1 3.

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  • Elongated, cylindrical, rounded at both ends; thick cuticle with acicular spicules; radula polystichous or wanting.

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  • In Pinus the only leaves produced on the main stern and the lateral shoots are scales, the acicular leaves of the tree growing from axillary shoots.

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  • The monoxychloride, WOC14, is obtained as red acicular crystals by heating the oxide or dioxychloride in a current of the vapour of the hexachloride, or from the trioxide and phosphorus pentachloride.

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  • Tungsten disulphide, W52, is obtained as soft black acicular crystals by the action of sulphur, sulphuretted hydrogen or carbon bisulphide on tungsten.

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  • Quinine of commerce is the neutral sulphate,C20H24N202 H2S04.8H20, which occurs in commerce in the form of very light slender white acicular crystals.

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  • It crystallizes in white or pale fawn-coloured acicular prisms or silky needles, and is soluble in alcohol and ether, and in loo parts of cold and 3 of boiling water; it is without odour and has an astringent and an acid taste and reaction.

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  • Sometimes the same plant produces both kinds of leaves on different branches, or the young plants produce acicular leaves, while those of the older plants are squamiform.

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  • Crystals of arsenic belong to the rhombohedral system, and have a perfect cleavage parallel to the basal plane; natural crystals are, however, of rare occurrence, and are usually acicular in habit.

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  • Distinctly developed crystals are, however, of rare occurrence; they are usually acicular with acute pyramid-planes and are repeatedly twinned on the prism.

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  • The material retains the nodular graphite distribution of ductile iron, but the matrix is acicular ferrite in a high carbon austenite.

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  • Delicate, acicular crystals with tiny quartz crystals attached to their terminations.

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  • An oxysulphide, 2CaS CaO, is sometimes present in "soda - waste," and orangecoloured, acicular crystals of 4CaS CaSO 4.18H 2 O occasionally settle out on the long standing of oxidized "sodaor alkali-waste" (see Alkali Manufacture).

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  • Crystals are prismatic, acicular or scaly in habit; they have a perfect cleavage parallel to the brachypinacoid (M in the figure).

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  • Sammetblende or przibramite is a variety, from Przibram in Bohemia, consisting of delicate acicular or capillary crystals arranged in radiating groups with a velvety surface and yellow colour.

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  • These are, according to Meyer, acicular crystals, which he calls tricizites.

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  • It is the methyl ester of a neutral body colchicein, which may be obtained in white acicular crystals.

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  • The haematoidin pigment may vary in colour from yellowish or orange-red to a ruby-red, and forms granular masses, rhombic prisms or acicular crystals.

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