Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download New Innovative Material The Kings School Robin HillsLonsdaleite
Document related concepts
Transcript
Nicola Sergeant and Jeana Kent Mrs I. Krynauw The King’s School Robin Hills We chose this material, because it is not very common or something you hear about often. Also, because it was named in honour of a lady named Kathleen Lonsdale and you don’t often hear about a scientific discovery named after a woman. Delight yourself in Lonsdaleite Properties • • • • Lonsdaleite is an allotrope of carbon, also called “hexagonal diamond”, because of the hexagonal lattice. It occurs naturally, forming when meteorites containing graphite hit the Earth. The graphite transforms into diamond due to the extreme heat and pressure of the impact. Scientists have also managed to synthesise Lonsdaleite in a laboratory. Lonsdaleite was first discovered in 1967 in the Canyon Diablo meteorite. There are no current applications of this Lonsdaleite is translucent, but is a greyish colour when in crystal form and a brownish-yellow colour when in broken fragments. It has a hexagonal shape due to the interlocking rings of six carbon atoms. It is said to be 58% stiffer than diamond. It is a very good conductor of heat. Future Applications Seeing as though scientists have already synthesised Lonsdaleite successfully in a laboratory, they could create more and use it in similar applications as industrial diamonds are used currently. It has potential for high pressure applications and research as it is much stronger and stiffer than current materials. Examples of use are as conductors of heat, anvils, cutting tools and drill bits. The atomic structure of Lonsdaleite material. References on back References: Ralph, J. & Chau, I. Date unknown. Mindat.org: Lonsdaleite. Date accessed: 2014/08/29. http://www.mindat.org/min-2431.html Qingkun, L., Yi, S., Zhiyuan, L. & Yu, Z. 2011. ScienceDirect.com: Lonsdaleite – A material stronger and stiffer than diamond. Date accessed: 2014/08/29. http://www.sciencedirect.com/science/article/pii/S1359646211002053 Diamond and Lonsdaleite. Date unknown. Google Images. Date accessed: 2014/08/29. http://phycomp.technion.ac.il/~anastasy/seminar2/lonsdiam.jpg Lonsdaleite datasheet, ©2001-2005 Mineral Data Publishing, version 1.
