Jisho

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立方晶窒化ホウ素
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Wikipedia definition
1. Borazon​Borazon is a brand name of a cubic form of boron nitride (CBN). Its color ranges from black to brown and gold, depending on the chemical bond. It is one of the hardest known materials, along with various forms of diamond and boron nitride. Borazon is a crystal created by heating equal quantities of boron and nitrogen at temperatures greater than 1800 °C (3300 °F) at 7 GPa. Borazon was first produced in 1957 by Robert H. Wentorf, Jr. , a physical chemist working for the General Electric Company.
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