X-Ray Diffraction (XRD) is one of spectroscopy method that utilize X-Ray as an energy source in the phases identification. This method is used to characterize the type of amethyst of Sukamara, Central Kalimantan. In this paper, the crystallography of three types of Sukamara amethyst is reported. Samples was collected directly from the amethyst mine in the Ajang village in the District of Permata Kecubung. The samples consists of three types i.e. purple amethyst, black amethyst, and violet amethyst. The results show that quartz or silica (SiO2) is the main phase of the gemstone amethyst. Amethyst cell parameters are a = b ≠ c and α = β ≠ γ, the crystal system is hexagonal. Amethyst average density is 2.65 g / cm3 and 112.84 pm3 cell volume. Peak FWHM value indicates that the degree of crystallinity of the black one is greater than that of the gasoline, while the degree of crystallinity of violet amethyst higher than purple amethyst.
|Journal of Physics: Conference Series
|Published - 2 Jun 2017
|5th International Conference on Theoretical and Applied Physics 2015, ICTAP 2015 - Kendari, Southeast Sulawesi, Indonesia
Duration: 23 Nov 2015 → 25 Nov 2015