Lonsdaleite, often called hexagonal diamond, is an allotrope of carbon with a unique structure that theoretically makes it harder than diamond. Unlike diamond's cubic crystal structure, Lonsdaleite has a hexagonal arrangement, which could make its bonds stronger under certain conditions. Diamonds are f...
Biphasic structureExtreme shear strainPhase transitionFirst principle calculationIt has been found recently in experiments that diamond/lonsdaleite biphase could possess excellent thermal-mechanical properties, implying that the properties of carbon materials can be improved by reasonably designing their internal...
Hexagonal diamond or lonsdaleite (2H) is a new form of carbon which was found in meteorites [1]. For the first time it was obtained artificially [2] under conditions of static pressure exceeding 13 GPa and temperature greater than 1000 °C. Hexagonal diamond differs from the cubic one (3C...
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Lonsdaleite (named in honour of Kathleen Lonsdale), also called hexagonal diamond in reference to the crystal structure, is an allotrope of carbon with a hexagonal lattice. In nature, it forms when meteorites containing graphite strike the Earth. The great heat and stress of the impact transforms...
structure (solids and liquids)gold, Augallium, Gastrontium, SrThe title compound is prepared by induction melting of the elements (Ta tube, Ar flow, 1300 K, 10 min) followed by annealing at 770 K (1 d).doi:10.1002/chin.201435003
We formulate a unit-cell model of open-cell elastic foams. In this model, a foam consists of four-bar tetrahedra arranged in the hexagonal diamond structure known as Lonsdaleite. The parameters of the model are the Young's modulus of the bars and a few geometric parameters, the values of ...
Electronic structure and optical properties of Si, Ge and diamond in the lonsdaleite phaseAuthor(s): C. A. B. de MARIA, C Pryor Publication date: 2014 Read this article at ScienceOpen Bookmark There is no author summary for this article yet. Authors can add summaries to their articles ...
The existence of polymorphs analogous to wurtzite among these elements is not surprising, because the two types of structure are so similar geometrically that the energy differences between them must be small. A wurtzite-like polymorph of silicon has already been synthesized. For carbon a ...
We formulate a unit-cell model of open-cell elastic foams. In this model, a foam consists of four-bar tetrahedra arranged in the hexagonal diamond structure known as Lonsdaleite. The parameters of the model are the Young's modulus of the bars and a few geometric parameters, the values of ...