lonsdaleite sentence in Hindi
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- Additionally, carbon polymorphs even harder than lonsdaleite have been discovered in the crater.
- Lonsdaleite has also been made artificially in laboratories.
- Lonsdaleite occurs naturally in asteroids and cosmic dust and as a result of extraterrestrial impacts on Earth.
- When viewed altogether, the atomic positions are the same as in lonsdaleite ( hexagonal diamond ).
- Naturally occurring lonsdaleite has also been identified in non-bolide diamond placer deposits in the Sakha Republic.
- It exists in various wurtzite BN modification is similar to lonsdaleite and may even be harder than the cubic form.
- Consequently, it has been suggested that " stacking disordered diamond " is the most accurate structural description of lonsdaleite.
- Lonsdaleite is simulated to be 58 % harder than diamond on the diamond's tip hardness of 162 GPa.
- Lonsdaleite was first identified in 1967 from the Canyon Diablo meteorite, where it occurs as microscopic crystals associated with diamond.
- :: According to " the stability domain of lonsdaleite ( hexagonal diamond ) lies entirely within that of cubic diamond ".
- Under some conditions, carbon crystallizes as lonsdaleite, a hexagonal crystal lattice with all atoms covalently bonded and properties similar to those of diamond.
- A quantitative analysis of the X-ray diffraction data of lonsdaleite has shown that about equal amounts of hexagonal and cubic stacking sequences are present.
- Some typical diamonds contain inclusions of common polymorph, lonsdaleite, have been found as inclusions in carbonados, although such inclusions might be expected if carbonados formed by meteorite impact.
- On the other hand, recent shock experiments with in situ X-ray diffraction show strong evidence for creation of relatively pure lonsdaleite in dynamic high-pressure environments such as meteor impacts.
- The property of lonsdaleite as a discrete material has been questioned, since specimens under crystallographic inspection showed not a bulk hexagonal lattice, but instead cubic diamond dominated by structural defects that include hexagonal sequences.
- One group examined carbon-14 dates for charcoal particles that showed wildfires occurred well after the proposed impact date, and the glass-like carbon was produced by wildfires and no lonsdaleite was found.
- The wurtzite form of boron nitride ( w-BN; point group = C 6v; space group = P6 3 mc ) has the same structure as lonsdaleite, a rare hexagonal polymorph of carbon.
- :I thought lonsdaleite occurs naturally and could in principle be harder than diamond ( except natural samples are never pure enough for that ) . talk ) 09 : 22, 8 May 2014 ( UTC)
- I would try to be clear about structures and show how lonsdaleite can be seen as derived from the diamond structure ( but hexagonal ) and nanotubes can be seen as derived from the graphite stucture ( rolled sheet ).
- I went to look this up, and according to Wikipedia, there's a whole nother kind of carbon called Lonsdaleite with a hexagonal matrix, which is harder than diamond in one plane but much softer in practice.
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