论文部分内容阅读
在初学矿物学课程中,如果学生进行晶体球面投影,就很容易理解结晶学的概念,特别是晶体的球面投影和立体投影间的关系.使用一支易着色且耐久的笔来标出晶抽、晶面极点和对称要素的位置,则不难在浑圆透明的气球上进行投影.为了说明这一过程,文中利用一个具立方体和八面体面的等轴晶体模型作球面投影,透过气球,可看到晶体模型的立体投影图.它看起来很类似于真实的二维立体图,这样,可使学生更容易看出三维立体、球面投影及二维立体投影间的关系.
In introductory mineralogy classes, students are easy to understand the notion of crystallography, especially if the students are using their crystal spheres, especially the relationship between the spherical projection of the crystal and the stereoscopic projection. Use an easily colored, durable pen to mark the crystal pumping , Crystal pole and the symmetry of the location of elements, it is not difficult to projection in the round and transparent balloon.To illustrate this process, the paper uses a cubic and octahedral surface of the equiaxed crystal model for spherical projection, through the balloon, You can see the stereoscopic projection of the crystal model that looks very much like a real two-dimensional perspective view, making it easier for students to see the relationship between three-dimensional, spherical and two-dimensional projections.