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Click Here For Best Selection Of High Quality Polarizing Microscope

Click Here For Best Selection Of High Quality Polarizing Microscope

In the field of optical mineralogy, a unit cell is defined as the basic atomic structure that is repeated regularly in a crystal. The size of the unit cell is determined through X-ray studies. The dimensions of the unit cell are expressed in terms of lengths along the direction of the three crystal axes. These absolute lengths are simplified into relative values through axial ratio. The axial ratio for tetragonal, hexagonal, or trigonal minerals is expressed in terms of the ratio of the length of the c-axis to the length of the a-axis, where a-axis is taken as 1. On the other hand, the axial ratio for orthorhombic, monoclinic, or triclinic minerals is expressed in terms of the ratio of the length of the a-axis to the length of the b-axis to the length of the c-axis, where b-axis is always being taken as 1.



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Thursday, April 16th, 2009 at 2:33 am
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Optical Mineralogy
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Click Here For Best Selection Of High Quality Polarizing Microscope