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.
... the Netherlands
Subsidized education in the Netherlands consists of the following official categories:
po: elementary education
vo: secondary education (vmbo, havo, ...
Buy Halloween Costumes
Kids.Net.Au - kids safe portal for children, parents, schools and