orthorhombic

• The results of mas nmr analysis indicate that the crystalline structure of cordierite was considerably changed by the incorporation of the zn2 ions or ti " " ions , leading to the partial transition from a - cordierite with a hexagonal crystalline structure to p - cordierite with a orthorhombic crystalline structure
  2al2o3 ? 4 . 6sio2堇青石固溶体样品的结构。 masnmr研究结果表明， zn2 + 、 ti4 -的固溶对样品中的堇青石结构具有重要的影响，使得样品中的堇青石由六方结构-堇青石向四方结构-堇青石转变。