一种新的锆石平衡态理论晶型

利用Machenzie方法, 计算了锆石晶体的{100}, {110}, {101}和{211}面的表面张力; 然后, 根据Wulf定律, 作出了一种新的锆石平衡态理论晶型. 该理论晶型由{211}锥面和不完全发育的{100}柱面组成, 与PBC理论晶型比较存在较大的差异. 平衡态理论晶型的推导将有助于理解深源岩浆或岩浆早期结晶锆石的晶型演化, 从而说明了锆石的形态具有岩石学标型意义.     

A new equilibrium form of zircon crystal

The surface tensions of the {100}, {110}, {101} and {211} faces are calculated by using Machenzie's method. A new equilibrium form of zircon crystal is then derived on the basis of Wulf's Law. This theoretic form consists of {100} prismatic faces and {211} pyramidal faces, which is different from that of the prediction by the periodic bond chain theory. The discovery of the equilibrium form of zircon crystal provides a clue for understanding of the morphology of zircon crystals formed in deep magma chamber, indicating that zircon morphology is an indicator of crystallization conditions.