| pilot production was started in cooperation with district industry. By 1989, all hard material research...extensive field work to extract pyrophyllite in Vietnam (supported by the Institute for Raw Materials Research...Geodynamics Research Center, Ehime University, 2-5 Bunkyo-cho, Matsuyama 790-8577, Japan; toinoue@hiroshima-u.ac...the EDS analyses. Working parameters of 15 kV, 1 nA, and collection times of 30–50 s were used. The chemical...acceleration voltage of 15 kV and probe current of 0.55 nA. Natural forsterite and synthetic fayalite and MnTiO3 |
