Creestal structur

In crystallographie, crystal structur is a description o the ordered arrangement o atoms, ions or molecules in a crystalline material.^[3]

The (3-D) crystal structur o H₂O ice Ih (c) consists o bases o H₂O ice molecules (b) locatit on lattice pynts within the (2-D) hexagonal space lattice (a). The valyies for the H–O–H angle an O–H distance hae come frae Physics of Ice^[1] wi uncertainties o ±1.5° an ±0.005 Å, respectively. The white box in (c) is the unit cell defined bi Bernal an Fowler^[2]