Molecular formula :
nature : a category can grow rules since the outbreak of convex polygon shape with the anisotropic crystalline material, its internal atoms, ions or molecules in 3D space for extended cyclical rules with its prominent structural features, with liquid, gas , amorphous solids (such as vitreous) are different. The three-dimensional crystal structure cycle consists of two elements, namely by repeated cycles of 3D entities (crystal structure-based or cell yuan), and reflect the basic cycle of three-dimensional size and direction of a base vector.
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