WebOct 9, 2024 · A twinning wisp diamond inclusion is a type of inclusion in the crystal structure of diamonds. It occurs when tiny, needle-like crystals are formed by an external agent. … WebAug 19, 2024 · The commonest type of twinned crystal is triangular and rather flattened looking and is called a macle. Evidence of the twinning consists of notches (re-entrant …
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WebNov 19, 2007 · A model for the formation of crystal twins in chemical vapour deposited diamond materials is presented. The twinning mechanism originates from the formation … WebDec 15, 1993 · The electronic properties of twinning boundaries, stacking faults, and a recently proposed structure, the twinning superlattice, in group IV and III-V diamond-type and zinc-blende-type semiconductors are calculated and discussed. The electronic properties of twinning boundaries, stacking faults, and a recently proposed structure, the twinning … riviera high school requirements
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Crystal twinning occurs when two or more adjacent crystals of the same mineral are oriented so that they share some of the same crystal lattice points in a symmetrical manner. The result is an intergrowth of two separate crystals that are tightly bonded to each other. The surface along which the lattice points are … See more Twinning is a form of symmetrical intergrowth between two or more adjacent crystals of the same mineral. It differs from the ordinary random intergrowth of mineral grains in a mineral deposit, because the relative … See more Simple twinned crystals may be contact twins or penetration twins. Contact twins meet on a single composition plane, often appearing as mirror … See more • Macle • Tin cry • Icosahedral twins • Slip bands • Slip (materials science) See more Twin laws are symmetry operations that define the orientation between twin crystal segments. These are as characteristic of the mineral as are its crystal face angles. For example, … See more There are three modes of formation of twinned crystals. • Growth twins are the result of an interruption or change in the lattice during formation or growth due to a possible deformation from a larger substituting ion. Parallel growth … See more • Slip and twinning mechanism in detail • Mineral galleries – twins • Mathematical and Theoretical Crystallography See more WebMar 17, 2010 · A DIAMOND COCKTAIL WATCH, c. 1930, the oblong dial with diamond-set arched lugs on a twinned snak. In Fine Art & Antique Sale. ... A DIAMOND COCKTAIL WATCH, c. 1930, the oblong dial with diamond-set arched lugs on a twinned snake link strap, the clasp stamped "9ct", the reverse of the case engraved "JPR to MMR 22-1-44". Auction … WebWikipedia Word definitions in Wikipedia Macle is a term used in crystallography . It is a crystalline form, twin-crystal or double crystal (such as chiastolite ). Macle is an old … smoothing by bin mean