Lonsdaleite is also known as "hexagonal diamond." It has an index of refraction from 2.40 to 2.41, a density from 3.2 to 3.3, and a hardness of 3.00.
... mention of the cemetery in written record is in the Tang Dynasty, by Du You (杜佑) in A Comprehensive Guide (通典 Tong Dian).
It is called by ...
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