Mystery meteorite diamond, tentatively recorded as being half as hard as terrestrial diamonds, successfully created by researchers
Breakthrough in the Lab: The Emergence of Harder Diamond Variant
In a groundbreaking development, scientists have successfully synthesized a new form of diamond, known as hexagonal diamond or lonsdaleite, in the lab [1][2][3][5]. This new crystal structure, which is theoretically harder than cubic diamond, could potentially revolutionize various industries with its enhanced properties.
The unique hexagonal lattice arrangement of hexagonal diamond involves carbon atoms stacked in alternating layers (ABAB…), differing from the cubic diamond’s ABCABC… stacking [1][2][3]. This distinctive structure is believed to boost the solid's hardness by up to 58%, according to scientific theories [1][2][3]. However, it's important to note that the experimental confirmation of its superior hardness is still ongoing, as current samples contain impurities or traces of cubic diamond [4][5].
The creation of this hardier diamond was achieved by a team led by Wenge Yang at the Center for High Pressure Science and Technology Advanced Research in Beijing [6]. They replicated the intense conditions of an impact with Earth in the lab, using a diamond anvil cell and starting with purified graphite. By applying pressures around 20 GPa (200,000 atmospheres) and laser heating above 1400 °C (2,552 Fahrenheit), they managed to force the flat carbon layers of graphite to slide and bond with adjacent layers, forming a buckled carbon honeycomb characteristic of hexagonal diamond [4].
The potential industrial applications of hexagonal diamond are vast and promising. It could potentially replace cubic diamond in high-performance cutting, drilling, and abrasive tools due to its superior hardness and toughness [1][2][3]. Furthermore, its enhanced mechanical properties could increase wear resistance in precision machining and high-precision equipment. In the realm of quantum technologies and electronics, its unique electronic and thermal properties could benefit quantum computing and thermal management systems [1][2][3][4][5]. Additionally, the novel properties of hexagonal diamond might enable breakthroughs in biosensors and advanced coatings, leading to increased sensor sensitivity and durability [1][2][3][4][5].
However, it's important to note that the production of larger, purer crystals is still in progress, with researchers aiming to fully characterize the material’s properties and transition from laboratory synthesis toward industrial adoption, which is anticipated to take about a decade [3][4].
In conclusion, hexagonal diamond shows great promise to surpass cubic diamond in hardness and enable next-generation material applications. While large-scale, pure production and comprehensive testing are still in progress, this breakthrough could pave the way for a new era of industrial diamond applications [1][4][5].
[1] https://www.nature.com/articles/nature25673 [2] https://www.sciencemag.org/news/2021/03/scientists-create-first-large-diamonds-hexagonal-structure-lonsdaleite [3] https://phys.org/news/2021-03-scientists-large-diamonds-hexagonal-structure-lonsdaleite.html [4] https://www.bbc.com/future/article/20210316-the-diamond-that-could-revolutionise-industry [5] https://www.sciencealert.com/scientists-have-created-the-first-large-hexagonal-diamonds-that-could-revolutionize-industry [6] https://www.chpc.ac.cn/en/
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In the realm of science and technology, the hardier diamond could potentially revolutionize various medical-conditions and industrial sectors, such as quantum technologies and electronics, precision machining, and high-precision equipment, biosensors, and advanced coatings, due to its enhanced properties resulting from a different carbon atom stacking arrangement. The creation of this hardier diamond, called hexagonal diamond or lonsdaleite, involves replicating the intense conditions of an impact with Earth in the lab using technology like diamond anvil cells and laser heating.
