geschlossenkörnig

geschlossenkörnig refers to a specific texture or structure found in certain materials, particularly in geology and material science. It describes a material where the individual grains or particles are tightly packed together with very little or no pore space between them. This close arrangement means that the grains are in direct contact with each other, minimizing any voids or empty spaces.

In petrology, a geschlossenkörnig texture often indicates that a rock has undergone significant pressure and compaction during its formation or subsequent history. This can lead to a dense, solid rock with reduced permeability, meaning fluids cannot easily flow through it. Examples of rocks that might exhibit this texture include some types of shale or tightly cemented sandstone.

In material science, geschlossenkörnig describes a microstructure where the grains of a material are uniformly fine and densely packed. This can affect the material's properties, such as its strength, hardness, and resistance to wear. For instance, in metals or ceramics, a fine-grained and geschlossenkörnig structure can lead to improved mechanical performance. The term emphasizes the absence of significant intergranular spaces, which can be weak points in a material.