目的要求：
1、熟练掌握晶体的定向原则；
2、熟练运用各晶系的晶轴的选择方法，熟悉各晶系晶体几何常数特点；
3、学会确定晶体上晶面符号并掌握晶面符号的书写方法及意义。
步骤：
1、找出晶体模型全部的对称要素；
2、根据对称特点选择合适的晶轴，对晶体进行定向；
3、观察晶面与结晶轴的空间方位关系，确定晶面符号。
模型号码：7052
[canvasio3D objPath=”../wp-content/uploads/2018/03/2-1.7022.stl” width=”500″ height=”500″ objScale=”0.80″ objColor=”#0099cc” lightSet=”3″ Mouse=”on”][/canvasio3D]模型号码：7011
[canvasio3D objPath=”http://202.117.108.119/jjxykwx/wp-content/uploads/2018/03/2-2.7011.stl” width=”500″ height=”500″ objScale=”0.80″ objColor=”#0099cc” lightSet=”3″ Mouse=”on”][/canvasio3D]模型号码：7006
[canvasio3D objPath=”http://202.117.108.119/jjxykwx/wp-content/uploads/2018/03/2-3.7006.stl” width=”500″ height=”500″ objScale=”0.80″ objColor=”#0099cc” lightSet=”3″ Mouse=”on”][/canvasio3D]模型号码：6011
[canvasio3D objPath=”http://202.117.108.119/jjxykwx/wp-content/uploads/2018/03/2-4.6011.stl” width=”500″ height=”500″ objScale=”0.80″ objColor=”#0099cc” lightSet=”3″ Mouse=”on”][/canvasio3D]模型号码：5034
[canvasio3D objPath=”http://202.117.108.119/jjxykwx/wp-content/uploads/2018/03/2-5.5034.stl” width=”500″ height=”500″ objScale=”0.80″ objColor=”#0099cc” lightSet=”3″ Mouse=”on”][/canvasio3D]模型号码：5020
[canvasio3D objPath=”http://202.117.108.119/jjxykwx/wp-content/uploads/2018/03/2-6.5020.stl” width=”500″ height=”500″ objScale=”0.50″ objColor=”#0099cc” lightSet=”3″ Mouse=”on”][/canvasio3D]模型号码：4022
[canvasio3D objPath=”http://202.117.108.119/jjxykwx/wp-content/uploads/2018/03/2-7.4022.stl” width=”500″ height=”500″ objScale=”0.80″ objColor=”#0099cc” lightSet=”3″ Mouse=”on”][/canvasio3D]模型号码：3027
[canvasio3D objPath=”http://202.117.108.119/jjxykwx/wp-content/uploads/2018/03/2-8.3027.stl” width=”500″ height=”500″ objScale=”1.00″ objColor=”#0099cc” lightSet=”3″ Mouse=”on”][/canvasio3D]
