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Granite does not belong to any crystal structure group because granite is a rock, not a mineral, and only minerals can be grouped by crystal form or shape. Minerals are naturally occurring solids which form the earth and make up its rocks. Minerals develop in predictable geometric patterns called crystals. The term used to describe a crystal's general shape is habit. Some examples of crystal habit groups are cubic, prismatic, tabular, etc. Minerals are sometimes called the building blocks of rocks because rocks are usually made up of 2 or more minerals which formed together in the same space, often without enough room for recognizable crystal formation. The minerals involved and the environment they formed in will determine the type of rock they make. Granite is a rock formed underground from cooled magma (lava that never reached the earth's surface) containing the minerals quartz, feldspar, mica and others. Each individual mineral in a rock belongs to a particular crystal group, but not the rock itself.

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What is an fact about Granite?

Granite is very resistant to fracture because of its interlocking mineral crystal structure.


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The tetragonal space group of the crystal structure being studied is P4/mmm.


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The space group notation for the crystal structure of a material is a way to describe the arrangement of atoms in the crystal lattice. It is represented by a combination of letters and numbers, such as P63/mmc or Fm-3m.


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Feldspar and quartz, with a hardness of 6 and 7 on the Mohs Scale respectively, are the minerals that give granite its abrasion resistance. Its hardness is due to the interlocking crystal structure as it cools from melt, making it among the hardest of rock types.


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