How deep-sea worms help keep natural gases on ice

It is well known that natural gas hydrates, crystalline lattices of hydrogen-bonded water molecules that encapsulate small hydrocarbon molecules, on the ocean floors constitute both a potential accelerator of climate change ...

All is quiet among newly studied Centaurs

Often, the squeaky wheel, or at least the shiniest object, seems to get all the attention. In a new study led by PSI Research Scientist Eva Lilly, it is the inactive Centaurs that take center stage and illuminate why other ...

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Crystal structure

In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms in a crystal. A crystal structure is composed of a motif, a set of atoms arranged in a particular way, and a lattice. Motifs are located upon the points of a lattice, which is an array of points repeating periodically in three dimensions. The points can be thought of as forming identical tiny boxes, called unit cells, that fill the space of the lattice. The lengths of the edges of a unit cell and the angles between them are called the lattice parameters. The symmetry properties of the crystal are embodied in its space group. A crystal's structure and symmetry play a role in determining many of its properties, such as cleavage, electronic band structure, and optical properties.

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