_audit_creation_method 'generated by CrystalMaker 9.2.7'Ĭrystal structure data from: W.F. CrystalMaker allows visualization of massive structures (millions of. You can create the CIF file yourself: data_Ice_Ic Moreover, some computer programs make use of anaglyphs such that the images. From the paper “High-resolution neutron powder diffraction study of ice Ic”, Le Journal de Physique Colloques, 48.C1 (1987), C1-631: XtalDraw is interactive Windows-based software that draws crystal and molecular structures as ball and stick, polyhedral, and thermal ellipsoid representations. Here are some examples of a cubic function. For example, there is only one real number that satisfies x 3 0 (which is x 0) and hence the cubic function f (x) x 3 has only one real root (the other two roots are complex numbers).

These were done from X-ray diffraction studies and only feature heavy atoms (oxygen) positions.Īlthough I could not find in any open database a CIF file for cubic ice with hydrogen positions, it is easy to make one. Since a cubic function involves an odd degree polynomial, it has at least one real root. With downloadable structure files in CIF format: 1, 2. You will then find several experimental structures for cubic ice: The structures are nets (special kinds of graphs) and to use the data one needs to. Search for structures with two elements O and H, and named “ice”. Knots, polycatenanes, tangled polyhedra (think of Eschers cube). One resource you can use is the Crystallography Open Database.

How to draw a cubic in crystalmaker