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Diamond cleavage
| Diamond Glossary (алмазы и бриллианты - глоссарий терминологии) |
The plane along which a diamond crystal can be split easily. the four planes parallel¬ing the faces of an octahedron are those generally referred to as the cleavage planes, or diamond cleav¬age. all crystalline diamonds are more or less brittle and will be fractured by a sufficiently violent blow, but the irregular surface of a fracture cannot be mistaken for the brilliant flat surface produced by cleaving. the carbon has no cleavage, and in ballas cleavage is absent or very poorly defined. diamond cleaving. the act or process of splitting dia¬monds into smaller pieces, which may be more readily used as tool points, gems, or drill diamonds. diamond concentration. the ratio of the area of a single-layer bit face covered by the inset diamonds or, in an impregnated bit, the bulk proportion of the crown occupied by diamonds.
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Cleavage, английский
- In an adhesively bonded joint, a separation in the joint caused by a wedge or other crack-‑opening-‑type action.
- The repeated division of cells in an embryo cleavage lines cleavage lines plural
- N расщепление class ~ расщепление класса
- The splitting of any body having a structure or line of cleavage: as fir cleaves longitudinally, slates horizontally, stones roughly, smoothly, conchoidal, or stratified, &c.
- A breakable weak point or fracture, usually caused by weak molecular structure. a cleavage is likely to split if struck in a certain direction, and in uncut diamonds, it is used as a natural site for splitting crystals prior to cutting and polishing.
- A break in a diamond which is parallel to the diamonds crystal planes. a cleavage may be caused by internal strain or a sharp blow.
- The natural areas of a diamond or gem where weak bonds hold the atoms together. when a stone is cut, the cutter will ‘split’ the stone along these planes/the cleavage lines.
- A fragment of a crystalline substance, such as a diamond produced by cleaving.
- As used by crystallographers, the tendency for crystalline substances, such as diamonds, to split along planes that are always parallel to at least one of the possible crystal faces peculiar to the crystal structure of a specific mineral or substance.
- As used by petrographers, the tendency for rocks to split along definite, parallel, closely spaced planes, which may be highly inclined to the bedding planes.
- Property or tendency of a rock to split easily along aligned, usually closely-spaced
- The mitotic divisions of the early embryo that occur in the absence of growth to divide the embryo into too many smaller nucleated cells.
- The splitting (fracture) of a crystal on a crystallographic plane of low index.
Cleavage banding, английский
Cleavage crack, английский
Cleavage fracture, английский
- Разрушение по плоскости спайности; разрушение сколом
- A fracture, usually of a polycrystalline metal, in which most of the grains have failed by cleavage, resulting in bright reflecting facets. it is one type of crystalline fracture. contrast with shear fracture.
Cleavage of lateral epitaxial films for transfer (cleft), английский
- A process for making inexpensive gallium arsenide (gaas) photovoltaic cells in which a thin film of gaas is grown atop a thick, single-crystal gaas (or other suitable material) substrate and then is cleaved from the substrate and incorporated into a cell, allowing the substrate to be reused to grow more thin-film gaas.
- A process for making
Cleavage plane, английский
- In a crystalline material, such as certain types of rocks, a plane along which splitting takes place most easily.
- The crystallographic plane, which can be likened to the grain in wood, along which a crys¬talline substance such as diamond may be split easily. see cleavage 2.
Cleavage test, английский
A test that measures the resistance of a timber to splitting longitudinally along the radial and tangential planes
Cleavage, 4., английский
Cleavages, английский
As used by the diamond-cutting and diamond-besetting industries, the more or less flat diamond fragments produced by splitting a crystalline diamond along the octahedral plane. such fragments are used primarily as a material from which special-shaped, diamond-pointed cutting tools are produced.
Diamond, английский
- Брильянт - конфигурация головы и плеч, в которой воротник “разорван”, поэтому конфигурация имеет ромбовидный вид;
- Mineral composed essentially of carbon crystallized at extremely high temperatures and pressures; in nature, diamonds form 150 to 200km (93 to 124 miles) or more below the earth`s surface. diamond is the hardest of all known natural substances (10 on the mohs scale); its refractive index is 2.417, dispersion 0.044, specific gravity 3.52, and its lustre is adamantine. diamond ranges from colourless to yellow, brown, gray, orange, green, blue, white, black, purple, pink and extremely rarely, red. transparent and near-colourless is a desirable colour, diamond is a highly valued gemstone.
- A diamond is a precious gem, comprised of a crystalline form of pure carbon, the hardest naturally occurring substance.
- The hardest known substance composed of carbon crystallized in the isometric system, the more common crystal forms being the octahedron and rhombic dodecahedron. the cube and some com¬plex and combination forms of the isometric system are found, as well as rounded, distorted, twinned, and cryptocrystalline forms. although very hard, diamond has excellent cleavage and breaks readily under a blow, yielding flat surfaces parallel to the octahedral planes. diamonds usually are classified as either "gems" or "industrials" on the basis of color, shape, size, crystal form, and the size and location of inclusions or other imperfections. dia¬monds sometimes also are classified on a geographical basis, such as angolas, brazilians, congos, sierra leones, or west africans. this does not strictly mean that diamonds so classed come from that specific geographical area but that they are similar to stones characteristically produced by mines in that locality. a method for synthesizing diamonds has been developed, and small industrial diamonds have been produced on a commercial scale. these synthetic diamonds are commonly called "manmade" and/or "mm diamonds."
- Ore drill manufacturers association. see dcdma.
Diamond (impregnated) wire, английский
Diamond - shaped lattice, английский
Diamond ashlar, английский
A rectangular building stone having a face that is pyramidal rather than flat.
Diamond ballas, английский
Diamond bit, английский
- Any bit having diamonds inset in its crown, which serve as the cutting points or media. commonly also called boart bit, boart-set bit, bort bit, bort-set bit, bortz bit, bortz-set bit.
- A drill bit that has small industrial diamonds embedded in its cutting surface. cutting is performed by the rotation of the very hard diamonds over the rock surface.
Diamond bit core head, английский
Алмазная головка колонкового снаряда набора со съемным керноприемником
Diamond boring, английский
Diamond broker, английский
A person who buys packets of diamonds from the marketing agency of the diamond syndicate or other source, re-sorts the diamonds, and acts as a retail agent selling directly to consumers. compare diamond buyer, diamond dealer. 32 a glossary of the diamond-drilling industry
Diamond buyer, английский
A person who buys diamonds directly from the producer at or near the site where the diamonds are found or mined. not to be confused with diamond broker who is sometimes miscalled a diamond buyer. diamond chip. a fragment of a diamond crystal. also called chip, chip diamond.
Diamond chip, английский
Diamond chisel, английский
Octahedron, английский
Восьмигранник, октаэдр
Crystalline, английский
- A substance or rock composed largely or wholly of mineral crystals.
- Transparent, clear, or pure.
- Made up of crystals. the term crystalline applies to sections of all chemical fibers, which consists of alternate crystalline and amorphous (noncrystalline) regions. these regions are influenced by manufacturing conditions and to some extent can be controlled. the degree of crystallinity influences the physical properties of fibers.
Concentration, английский
- The amount of a substance present in a certain amount of soil, water, air, food, blood, hair, urine, breath, or any other media.
- Concentración
- N концентрация
- Концентрация; кучность
- The area covered by the diamonds as compared with the total area of the cutting surface of a surface-set bit.
- The volume of diamonds, expressed in percent, compared to the total volume of the crown of an im pregnated bit
- The percentage of acid compared with the volume of water added to produce a dilute solution.
- Концентрация. количество вещества, выраженное в единицах массы или молярных единицах, в единице объема жидкости или единице массы твердого тела. con. dence interval
- Концентрация. количество вещества, выраженное в единицах массы или молярных единицах, в единице объема жидкости или единице массы твердого тела.
Impregnated, английский
- A metallic material in which fragments of diamond or other hard substances (in unflocculated distribution) are intermixed and embedded. see impregnated bit.
- Said of rock, fabrics, or other bodies the pores of which are more or less filled with extraneous materials such as oil, tar, resins, rubber, etc.
- Containing metallic minerals, scattered or dif fused throughout the mass. properly used in re ferring to country rock containing scattered grains of mineral similar to that in the vein. 53
Proportion, английский
- A quantity of something, especially as compared to the whole a high proportion of cancers can be treated by surgery. the proportion of outpatients to inpatients is increasing. ‘…the target cells for adult myeloid leukaemia are located in the bone marrow, and there is now evidence that a substantial proportion of childhood leukaemias also arise in the bone marrow’ [british medical journal]
- Доля; отношение; пропорция prospective (cohort) study
- Доля; отношение; пропорция
- In naval architecture, the length, breadth, and height of a vessel, having a due consideration to her rate, and the object she is intended for.
- Пропорция; состав (смеси и т.п.); пропорциональная часть || составлять, дозировать
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Bedding planes, английский
The planes or surfaces separating individual laminae, beds, or strata of sedimentary rock.
Kickoff point, английский
The place in a borehole where the first intentional deviation starts. sometimes abbrevi¬ated kop.
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