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In optical mineralogy and petrography, a thin section (or petrographic thin section) is a thin slice of a rock or mineral sample, prepared in a laboratory, for use with a polarizing petrographic microscope, electron microscope and electron microprobe. A thin sliver of rock is cut from the sample with a diamond saw and ground optically flat.
Ultramicrotomy is a method for cutting specimens into extremely thin slices, called ultra-thin sections, that can be studied and documented at different magnifications in a transmission electron microscope (TEM). It is used mostly for biological specimens, but sections of plastics and soft metals can also be prepared.
Ceramography is the art and science of preparation, examination and evaluation of ceramic microstructures. [1] Ceramography can be thought of as the metallography of ceramics. The microstructure is the structure level of approximately 0.1 to 100 μm , between the minimum wavelength of visible light and the resolution limit of the naked eye.
These thin sections allow for the examination of the internal structure of the ceramics and facilitate the identification of mineral phases, crystalline structures, and textural features. The methodology of ceramic petrography draws upon principles from various fields, including optical mineralogy, thin section petrography, and soil micromorphology
Microtomy is a method for the preparation of thin sections for materials such as bones, minerals and teeth, and an alternative to electropolishing and ion milling. Microtome sections can be made thin enough to section a human hair across its breadth, with section thickness between 50 nm and 100 μm.
A scanned image of a thin section in cross polarized light. A rock-section should be about one-thousandth of an inch (30 micrometres) in thickness, and is relatively easy to make. A thin splinter of the rock, about 1 centimetre may be taken; it should be as fresh as possible and free from obvious cracks.
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Sections are known as thin slices need to be tested in all studies of cellular structures. [13] This technique can be used for the preparation of tissue of animals and plants. [ 14 ] For using under optical microscopy, the thickness of the material should be between above 2 and 25 micrometers.