| 单词 | rhombic |
| 例句 | In so doing, he became interested in the rhombus and invented plastic rhombic hexahedrons that interlocked to form novel shapes. Charles O. Perry Dies at 81; Sculptor Inspired by Geometry 2011-02-11T06:26:06Z And what a shape it will be: a 12-sided rhombic dodecahedron. Spare Times for Children for Jan. 11-17 2013-01-10T23:09:44Z The most common and most stable allotrope of sulfur is yellow, rhombic sulfur, so named because of the shape of its crystals. Chemistry 2019-02-14T00:00:00Z Going up a level of systematic focus, this strange Cretaceous flier belonged to a family of pterosaurs called istodactylids that are recognized by their long skulls and “rhombic teeth.” New Pterosaur Was Fossilized with a Ridiculous Grin 2019-09-28T04:00:00Z They therefore came up with a rhombic pattern, covering the brickwork of the entire tower along with the already filled-in windows • • Know more? Accidentally Wes Anderson: Instagram finds stylised symmetry in real cities 2018-01-04T05:00:00Z It crystallizes in rhombic prisms which are readily soluble in hot water, melt at 187� C. and decompose at about 240� C. It is readily hydrolysed by hot caustic alkalis to benzoic acid and glycocoll. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 5 "Hinduism" to "Home, Earls of" 2012-03-25T02:00:05.717Z A silicate of aluminium, occurring usually in thick rhombic prisms, nearly square, of a grayish or pale reddish tint. Webster's Unabridged Dictionary 2012-03-24T02:00:23.513Z Crystals of rhombic sulfur melt at 113 °C. Cooling this liquid gives long needles of monoclinic sulfur. Chemistry 2019-02-14T00:00:00Z Pertaining to the shorter diagonal, as of a rhombic prism. Webster's Unabridged Dictionary (2nd 100 Pages) 2012-03-24T02:00:19.387Z The crystals are usually oblique rhombic prisms, varying in size from the larger symmetrical shapes to the more minute, apparently granular, forms. A System of Practical Medicine by American Authors, Vol. I Volume 1: Pathology and General Diseases 2012-03-17T02:00:54.097Z Well-developed crystals are of common occurrence; they usually have the form of the regular octahedron, sometimes in combination with the cube and the rhombic dodecahedron. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 8 "Cube" to "Daguerre, Louis" 2012-01-31T03:00:17.257Z A drawing of a crystal showing a combination of the cube, octahedron and rhombic dodecahedron is shown in fig. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" 2012-01-22T03:00:24.397Z This form is stable from 96 °C to the melting point, 119 °C. At room temperature, it gradually reverts to the rhombic form. Chemistry 2019-02-14T00:00:00Z The shorter of the diagonals in a rhombic prism. Webster's Unabridged Dictionary (2nd 100 Pages) 2012-03-24T02:00:19.387Z The solution is filtered and allowed to cool, when colourless rhombic pyramids of the aurocyanide separate. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2 "Gloss" to "Gordon, Charles George" 2011-10-31T02:00:28.703Z The two forms, rhombic and monosymmetric, can exist in equilibrium at 95.6�, the transition point at which they have the same vapour pressure. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" 2011-08-15T02:00:28.473Z Of the seven simple forms, the cube, rhombic dodecahedron and tetrakis-hexahedron are geometrically the same as before, though on actual crystals the faces will have different surface characters. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" 2012-01-22T03:00:24.397Z Both rhombic sulfur and monoclinic sulfur contain S8 molecules in which atoms form eight-membered, puckered rings that resemble crowns, as illustrated in Figure 18.25. Chemistry 2019-02-14T00:00:00Z Fluor-spar crystallizes in the cubic system, commonly in cubes, either alone or combined with the octahedron, rhombic dodecahedron, four-faced cube, &c. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 5 "Fleury, Claude" to "Foraker" 2011-04-03T02:00:20.883Z It crystallizes in yellow rhombic prisms, and is readily soluble in water, the solution having a bitter taste and an alkaline reaction. Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 7 "Bible" to "Bisectrix" 2010-12-20T17:12:05.780Z It forms rhombic crystals possessing a sweet taste. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" All the forms are open, being either pinacoids or prisms; the former consisting of a pair of parallel faces, and the latter of four faces intersecting in parallel edges and with a rhombic cross-section. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" 2012-01-22T03:00:24.397Z When rhombic sulfur melts, the straw-colored liquid is quite mobile; its viscosity is low because S8 molecules are essentially spherical and offer relatively little resistance as they move past each other. Chemistry 2019-02-14T00:00:00Z The crystals have the form of the octahedron or rhombic dodecahedron, and are frequently twinned. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 5 "Arculf" to "Armour, Philip" They form rhombic crystals of a red or brown red or brown red colour and are readily decomposed by warm water, with formation of the bichromate. Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 7 "Bible" to "Bisectrix" 2010-12-20T17:12:05.780Z Autunite, a hydrous phosphate of uranium and calcium, crystallizing in the rhombic system in yellow plates. The New Gresham Encyclopedia. Vol. 1 Part 3 Atrebates to Bedlis Six of the simple forms, the cube, tetrahedron, rhombic dodecahedron, deltoid dodecahedron, triakis-tetrahedron and pentagonal dodecahedron, are geometrically the same in this class as in either the tetrahedral or pyritohedral classes. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" 2012-01-22T03:00:24.397Z An important character of blende is the perfect dodecahedral cleavage, there being six directions of cleavage parallel to the faces of the rhombic dodecahedron, and angles between which are 60�. Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 1 "Bisharin" to "Bohea" The “rhombic dodecahedron,” one of the geometrical semiregular solids, is an important crystal form. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 5 "Dinard" to "Dodsworth" The acid is thus obtained in colourless rhombic prisms of the composition C6H8O7 + H2O. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 4 "Cincinnatus" to "Cleruchy" In the case of sodium dihydrogen phosphate, NaH2PO4�H2O, a stable rhombic form is obtained from warm solutions, while a different, unstable, rhombic form is obtained from cold solutions. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Six kinds of primitive forms were distinguished, namely, the cube, the regular octahedron, the regular tetrahedron, a rhombohedron, an octahedron with a rhombic base, and a double six-sided pyramid. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" 2012-01-22T03:00:24.397Z The chloride crystallizes in colourless rhombic tables of specific gravity 3.0 and is readily soluble in water, but is almost insoluble in concentrated hydrochloric acid and in absolute alcohol. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon" Thus calcspar is in the 2nd, or hexagonal, whilst aragonite is in the 4th, the rhombic, system, yet both are the same substance, viz.:—carbonate of lime. The Chemistry, Properties and Tests of Precious Stones These differ much in appearance from the rhombic crystals obtained by crystallizing sulphur from its solution in carbon disulphide. An Elementary Study of Chemistry The above may be illustrated by considering the equilibrium between rhombic and monoclinic sulphur. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" If a little more ammonia is added, several varieties of rhombic octahedra appear; if a little nitric acid is added, the rectangular prism appears again. On the Genesis of Species It forms rhombic prisms or plates which melt at 25� and boil at 83�, and has a spiritous smell, resembling that of camphor. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary" They are dark brown or yellow rhombic prisms. Aids to Forensic Medicine and Toxicology Above this temperature the rhombic changes into monoclinic; at lower temperatures the monoclinic changes into rhombic. An Elementary Study of Chemistry Monoclinic sulphur, obtained by crystallizing fused sulphur, melts at 119.5�, and admits of undercooling even to ordinary temperatures, but contact with a fragment of the rhombic modification spontaneously brings about the transformation. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" The form is a cube modified to an octahedron and a rhombic dodecahedron. To The Gold Coast for Gold, Vol. II A Personal Narrative It is obtained as rhombic plates by mixing dilute solutions of calcium chloride and sodium phosphate, and passing carbon dioxide into the liquid. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary" Barberio's Test.—Mix a drop of the spermatic stain with a drop of a saturated solution of picric acid, when needle-shaped yellow rhombic crystals are formed. Aids to Forensic Medicine and Toxicology Sulphur occurs in two crystalline forms, namely, rhombic sulphur and monoclinic sulphur. An Elementary Study of Chemistry From Reicher’s determinations, the exact transition point is 95.6�; it rises with increasing pressure about 0.05� for one atmosphere; the density of the rhombic form is greater than that of the monoclinic. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Anterior part with 7 equatorial and 1 rhombic plates Genus *Peridinium Anterior part with 5 equatorial and no rhombic plates Genus Gonyaulax Anterior part with 3 equatorial and no rhombic plates Genus *Ceratium 9. Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21:415-468, 1901 The crystals are rhombic or hexagonal tablets or leaves, and are quite regularly formed. Scientific American Supplement, No. 711, August 17, 1889 The rhombic dodecahedron is not regular, for though the lines and surfaces are equal, the angles are not. Occult Chemistry Clairvoyant Observations on the Chemical Elements When sulphur crystallizes from its solution in carbon disulphide it separates in crystals which have the same color and melting point as roll sulphur, and are rhombic in shape. An Elementary Study of Chemistry The overheating curve of rhombic sulphur extends along the curve AC, where C is the melting-point of monoclinic sulphur. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Mannite crystallises in needles or rhombic prisms, which are soluble in water and alcohol, and have a sweet taste. Nitro-Explosives: A Practical Treatise The bark is marked with numerous rhombic or oval scars, arranged in quincunx order, and indicating the points where the long, needle-shaped leaves were formerly attached. The Ancient Life History of the Earth A Comprehensive Outline of the Principles and Leading Facts of Palæontological Science For, instead of a siliceous ground, maculated with the rhombic feld-spar, which is the common state of porphyry, the ground is uniformly crystallised, or a homogeneous regular feld-spar, maculated with the transparent siliceous substance. Theory of the Earth, Volume 1 (of 4) Flowers of sulphur, the preparation of which has been described, consists of a mixture of rhombic crystals and amorphous particles. An Elementary Study of Chemistry When precipitated from solutions it forms red tetragonal crystals, which, on careful heating, give a yellow rhombic form, also obtained by crystallization from the fused substance, or by sublimation. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" The tail round, tapering, with imbricate rhombic seales, with the keels forming longitudinal ridges. Discoveries in Australia, Volume 1. With an Account of the Coasts and Rivers Explored and Surveyed During The Voyage of H.M.S. Beagle, in the Years 1837-38-39-40-41-42-43. By Command of the Lords Commissioners of the Admiralty. Also a Narrative Of Captain Owen Stanley's Visits to the Islands in the Arafura Sea. The rhombic crystals that characterize sulphur at ordinary temperatures and pressures, give place to monoclinic crystals at 95.5 degrees C. Sulphur thus exists with two crystalline forms whose stability depends directly upon the temperature. Popular Science Monthly Oct, Nov, Dec, 1915 — Volume 86 The pectoral fins, which are large and broad and united to the sides of the body and head, give a somewhat rhombic form to these fishes. The Gutenberg Webster's Unabridged Dictionary Section S In a few days it becomes quite brittle and passes over into ordinary rhombic sulphur. An Elementary Study of Chemistry Hexachlorethane is trimorphous, forming rhombic, triclinic and cubic crystals; the successive changes occur at about 44� and 71�, and are attended by a decrease in density. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Body compressed, with rings of rather small rhombic keeled rough uniform scales placed in cross rings; of the belly rather larger, obliquely keeled; of the limbs larger. Discoveries in Australia, Volume 1. With an Account of the Coasts and Rivers Explored and Surveyed During The Voyage of H.M.S. Beagle, in the Years 1837-38-39-40-41-42-43. By Command of the Lords Commissioners of the Admiralty. Also a Narrative Of Captain Owen Stanley's Visits to the Islands in the Arafura Sea. But Sophy's boss had a rhombic nose, and no instep, and the tail of his name had been amputated. Buttered Side Down: Stories The color of the mineral itself is a glistening grayish lead color, resembling chromite somewhat in appearance, but the crystals of an entirely different shape, being highly modified or indistinct rhombic prisms. Scientific American Supplement, No. 363, December 16, 1882 Roll sulphur is made up of minute rhombic crystals. An Elementary Study of Chemistry And quite the same thing occurs with ivy, the climbing stems of which never flower, but always first produce erect and free branches with rhombic leaves. Species and Varieties, Their Origin by Mutation Its back displayed, upon a yellow ground, transverse bands, partly black, and partly inclining to a brown green: under the belly the bands were blue, and united in rhombic spots. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 Very recently a paper was read before the Mathematical Society of London by Mrs. Bryant, Sc.D., on the geometrical form of perfectly regular cell structure, illustrated by models of cube and rhombic dodecahedron. Hold Up Your Heads, Girls! : Helps for Girls, in School and Out The laminae of this fine-grained rock may be as thin as cardboard in places, and close joints may break the rock into small rhombic blocks. The Elements of Geology Heat is set free when monoclinic sulphur changes into rhombic. An Elementary Study of Chemistry Calcium carbonate sometimes crystallizes in needle-shaped crystals belonging to the rhombic system. An Elementary Study of Chemistry The traga-venados have no transverse bands on the back, but a chain of rhombic or hexagonal spots. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 |
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