Fig. 3From: Sintering polycrystalline olivine and polycrystalline clinopyroxene containing trace amount of graphite from natural crystalsX-ray diffraction patterns from the mineral powders and sintered samples of a olivine and b clinopyroxene from powders milled with ethanol. Olivine and clinopyroxene samples were sintered at 1300 and 1280 °C, respectively. The XRD patterns of both sintered samples did not exhibit graphite peaks (e.g., at a 2θ value of 26°)Back to article page