抄録
The morphology of zircon crystals synthesized by the flux method and doped with elements common in igneous rocks is described quantitatively, using a new method proposed by the first author. Within the experimental temperature range of 1150° to 1100°C, only {100} among the prism faces develops in all the zircons. The zircons doped with P or S show long prismatic habit, whereas non-doped zircons show a bipyramidal habit with very short prisms, and those with other doping elements a short-prismatic habit. As for the pyramid, {101} is exclusive in zircons doped with Ti, Al, Fe, P, S or U, and it is dominant in those doped with Ca, Mg, K, Na, Ni or Mn, with small {211} increasing in dimension in the same order. The effect of S and Mn, when mixed with other doping elements, becomes less distinct. The presence of P, however, always induces the formation of long prismatic crystals.
