Lonsdaleite static press or using explosives. It has also been produced by chemical vapor deposition, and also by the thermal decomposition of a polymer, poly(hydridocarbyne), at atmospheric pressure, under argon atmosphere, at . It is translucent, brownish-yellow, and has an index of refraction of 2.40 to 2.41 and a specific gravity of 3.2 to 3.3. Its hardness is theoretically superior to that of cubic diamond (up to 58% more), according to computational simulations, but natural specimens exhibited somewhat lower hardness through a large range of values (from 7 to 8 on Mohs hardness scale). The cause is speculated as being due
Frederic E. Mohs sections are examined instead of the Mohs paste-fixed sections. This method is now commonly referred to as Mohs surgery, and occasionally "chemosurgery", in reference to the Mohs paste that Mohs initially used. In 1943 Mohs married Mary Ellen Reynolds, who died in 1995. Mohs died at his home in Madison, Wisconsin on 2 July 2002, at the age of 92. He was survived by two sons, Frederic and Thomas, of Madison; and a daughter, Jane Schimming of Stuart, Fla. Frederic E. Mohs Frederic Edward Mohs (1 March 1910 – 2 July 2002), a physician and general surgeon, developed the Mohs