Alias hexagonal diamond
Crystal System of Meteorite Diamonds: Hexagonal Crystal System Explanation: The composition of lonsdale is similar to that of ordinary diamonds, but all the diamonds on the earth are equiaxed, and few of them belong to hexagonal crystal system. There are only 2-3 public beings on the earth.
history
America 200 years ago? (The netizen said Britain earlier, but I found it was the United States. Geologist lonsdale was studying a small particle that fell from the sky into a table tennis meteorite in Arizona, USA, and found a strange combination of carbon atoms in this meteorite particle. Then we also know the concept of allotrope. Diamond is hard and graphite is soft, but they are all composed of the same carbon element. The problem is that its crystal arrangement is different, so the carbon atoms of diamonds we see in nature are all arranged in equiaxed crystal system. However, among the meteorite particles discovered by Mr. lonsdale, they are arranged in hexagonal equiaxed crystal system, so they are different from those on the earth. Therefore, Mr lonsdale defined it as a hexagonal meteorite diamond. Because this kind of diamond was discovered in lonsdale, this kind of gem is also named after lonsdale.
The most in the world
Lonsdale stone is the second hardest ore in the world. The hardness is 58% higher than that of ordinary diamonds. Sina Science and Technology News February 19, Beijing time, according to the British "New Scientist" magazine, Shanghai scientists found through experiments that the hardness of two substances is higher than that of diamonds, and the hardness of a rare natural substance is 58% higher than that of diamonds. Pan Zicheng, who founded Shanghai Jiaotong University under extreme conditions, and his colleagues conducted a simulation experiment to simulate how atoms of two substances with high hardness react to the pressure exerted by a pointed probe. The first substance is wurtzite boron nitride, which is similar in structure to diamond, but consists of different atoms; The second is lonsdale stone (also known as "hexagonal diamond"), which, like diamonds, is composed of carbon atoms, but their carbon atoms are arranged in different shapes. Few wurtzite boron nitride and lonsdale stone are naturally produced or made in the laboratory. Until now, no one has found their amazing hardness. The simulation experiment shows that the compressive strength of wurtzite boron nitride is 65438 08% higher than that of diamond and 58% higher than that of Birence Dailite. If these results can be confirmed by physical experiments, the hardness of these two substances will greatly exceed that of any other substances that have been measured.
Location of lonsdale (Owner)
1. There is 1 lonsdale in the Washington Museum, with a diameter of about1mm. That's what I said. At that time, the geologist in lonsdale said that he had found hexagonal diamonds. (This is an authoritative possession) 2. Wang Zhankui in Chifeng, Inner Mongolia, China has a natural sphere, beige and opaque, weighing 43.03 carats, with a diameter of 1.75cm- 1.80cm, which naturally glows at night, commonly known as the "meteor diamond night pearl" (because of the Washington Museum). This "lonsdale" was comprehensively tested and identified by the appraisal room of China Gemological Association, and was named. In 2003, the Notary Office of Chifeng City in Inner Mongolia issued a notarial certificate for Mr. Wang Zhankui [(2003) CHZ NeiminziNo. 1-3].